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  <url>
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    <loc>https://preiser.com/products/lead-acetate-trihydrate-acs-reagent-grade-100-g-gfs-chemicals-46830</loc>
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    <loc>https://preiser.com/products/magnesium-oxide-reagent-acs-bottle-of-500-grams-non-regulated</loc>
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    <loc>https://preiser.com/products/phenol-acs-reagent-crystals-500-g-58152-6-1-un1671-p-g-ii</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/GFS-980-09.png?v=1786099884</image:loc>
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      <image:caption>Phenol, ACS Reagent, Crystals, 500 g, 58152, (6.1, UN1671, P.G. II)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/potassium-ferricyanide-acs-reagent-sold-by-each-each-100-grams-non-regulated</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/GFS-991-07.png?v=1786099886</image:loc>
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      <image:caption>Potassium Ferricyanide, ACS Reagent (Sold by Each / Each = 100 Grams) (Non-Regulated)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/magnesium-chloride-98-anhydrous-500-g-gfs-chemicals-48811</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/GFS-A4602-09_0b5860a1-d5e0-46b6-ac90-84d3dbe02faf.png?v=1786099888</image:loc>
      <image:title>Magnesium Chloride, 98% Anhydrous, 500 g, GFS Chemicals, 48811</image:title>
      <image:caption>Magnesium Chloride, 98% Anhydrous, 500 g, GFS Chemicals, 48811</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/sodium-hexametaphosphate-99-500-g-gfs-chemicals-67551</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/GFS-A7302-09_36cd0f0f-8880-4f7a-a373-548038a031ee.png?v=1786099890</image:loc>
      <image:title>Sodium Hexametaphosphate, 99%, 500 g, GFS Chemicals 67551</image:title>
      <image:caption>Sodium Hexametaphosphate, 99%, 500 g, GFS Chemicals 67551</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/sodium-tripolyphosphate-technical-grade-500-g-gfs-chemicals-69681</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/GFS-A7566.png?v=1786099892</image:loc>
      <image:title>Sodium Tripolyphosphate, Technical Grade, 500 g, GFS Chemicals, 69681</image:title>
      <image:caption>Sodium Tripolyphosphate, Technical Grade, 500 g, GFS Chemicals, 69681</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/no-200-whitehouse-glass-bead-sieve-standards-5-vials-of-1-0-g</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/GIL-BS398.png?v=1786099894</image:loc>
      <image:title>No. 200 Whitehouse Glass Bead Sieve Standards, 5 Vials of 1.0 g</image:title>
      <image:caption>No. 200 Whitehouse Glass Bead Sieve Standards, 5 Vials of 1.0 g</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/whitehouse-sieve-reference-standards-170-mesh-90-micron-beads-bs-399</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/GIL-BS399.png?v=1786099896</image:loc>
      <image:title>Whitehouse Sieve Reference Standards, 170 Mesh (90 micron) Beads, BS-399</image:title>
      <image:caption>Whitehouse Sieve Reference Standards, 170 Mesh (90 micron) Beads, BS-399</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/whitehouse-sieve-standards-soda-lime-glass-beads-for-sieves-with-no-100-150-%C2%B5m-openings-1-lb-bs-402</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/GIL-BS402.png?v=1786099897</image:loc>
      <image:title>Whitehouse Sieve Standards, Soda-Lime Glass Beads, for Sieves with No. 100 (150 µm) Openings, 1 lb, BS-402</image:title>
      <image:caption>Whitehouse Sieve Standards, Soda-Lime Glass Beads, for Sieves with No. 100 (150 µm) Openings, 1 lb, BS-402</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/porta-cover-for-the-ps-3-and-ps-4-gilson-porta-screen-models-psa-312</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/GIL-PSA312.png?v=1786099898</image:loc>
      <image:title>Porta Cover for the PS-3 and PS-4 Gilson Porta-Screen Models, PSA-312</image:title>
      <image:caption>Porta Cover for the PS-3 and PS-4 Gilson Porta-Screen Models, PSA-312</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/pump-pedal-spring-for-gilson-test-master-testing-screens</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/GIL-RPTM-KEY209.png?v=1786099900</image:loc>
      <image:title>Pump Pedal Spring for Gilson Test-Master Testing Screens</image:title>
      <image:caption>Pump Pedal Spring for Gilson Test-Master Testing Screens</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/gilson-model-sc-163-aluminum-pan-4qt-13-5-in-x-10-in-x-2-5-in-h-2lb</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/GIL-SC163_8ec93d7f-3c96-4aef-9366-62e4d0f02f60.png?v=1786099901</image:loc>
      <image:title>Gilson Model SC-163 Aluminum Pan, 4qt., 13.5 in. x 10 in. x 2.5 in. H, 2lb.</image:title>
      <image:caption>Gilson Model SC-163 Aluminum Pan, 4qt., 13.5 in. x 10 in. x 2.5 in. H, 2lb.</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/pan-round-aluminum-1-3-qt-8-x-1-5-in-203-x-38mm-diameter-x-height-gilson-sc-165</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/GIL-SC165.png?v=1786506507</image:loc>
      <image:title>Pan, Round Aluminum, 1.3 qt, 8 x 1.5 in, (203 x 38mm) Diameter x Height, Gilson, SC-165</image:title>
      <image:caption>Pan, Round Aluminum, 1.3 qt, 8 x 1.5 in, (203 x 38mm) Diameter x Height, Gilson, SC-165</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/gilson-model-sp-0-universal-splitter-3-5-cu-ft-hopper-capacity-48-1-in-chute-bars</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/GIL-SP-0.png?v=1786099903</image:loc>
      <image:title>Gilson Model SP-0 Universal Splitter, 3.5 cu.ft. Hopper Capacity, 48-1 in. Chute Bars,</image:title>
      <image:caption>Gilson Model SP-0 Universal Splitter, 3.5 cu.ft. Hopper Capacity, 48-1 in. Chute Bars,</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/gilson-model-sp3-universal-splitter-with-0-06-cu-ft-hopper-capacity</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/GIL-SP3-01_539add43-f24d-467a-b1e2-c8011be111c6.png?v=1786099905</image:loc>
      <image:title>Gilson Model SP3 Universal Splitter with 0.06 cu.ft. Hopper Capacity</image:title>
      <image:caption>Gilson Model SP3 Universal Splitter with 0.06 cu.ft. Hopper Capacity</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/chute-attachment-for-gilson-sp-1-sample-splitter</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/GIL-SPA102-01_18770a16-98b3-4bc8-a31b-c98c0b7e9ecf.png?v=1786099906</image:loc>
      <image:title>Chute Attachment for Gilson SP-1 Sample Splitter</image:title>
      <image:caption>Chute Attachment for Gilson SP-1 Sample Splitter</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/gilson-model-spa-301-aluminum-pan-1-1-qt-for-sp3-7-5-in-x-3-7-in-x-2-3-in-h-1-lb</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/GIL-SPA301.png?v=1786099907</image:loc>
      <image:title>Gilson Model SPA-301 Aluminum Pan, 1.1 qt., for SP3, 7.5 in. x 3.7 in. x 2.3 in. H, 1 lb.</image:title>
      <image:caption>Gilson Model SPA-301 Aluminum Pan, 1.1 qt., for SP3, 7.5 in. x 3.7 in. x 2.3 in. H, 1 lb.</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/gilson-model-spa-450-lift-cart-for-sp-0-universal-splitter</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/GIL-SPA450_f11a14c4-7fb5-4656-b184-ae8334b267ab.png?v=1786099909</image:loc>
      <image:title>Gilson Model SPA-450 Lift Cart for SP-0 Universal Splitter</image:title>
      <image:caption>Gilson Model SPA-450 Lift Cart for SP-0 Universal Splitter</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/test-master-testing-screen-7-tray-capacity-115v-60hz-gilson-tm-6</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/GIL-TM-6.png?v=1786099910</image:loc>
      <image:title>Test Master Testing Screen, 7-Tray Capacity, 115V, 60Hz, Gilson, TM-6</image:title>
      <image:caption>Test Master Testing Screen, 7-Tray Capacity, 115V, 60Hz, Gilson, TM-6</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/gilson-inclined-shoot-pan-tsa-117</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/GIL-TSA117.png?v=1786099911</image:loc>
      <image:title>Gilson Inclined Shoot Pan, TSA-117</image:title>
      <image:caption>Gilson Inclined Shoot Pan, TSA-117</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/blank-test-screen-tray-for-5in-no-4-125-4-75mm-astm-iso-wire-cloth</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/GIL-TSA136.png?v=1786099912</image:loc>
      <image:title>Blank Test Screen Tray for 5in-No. 4 (125-4.75mm) ASTM/ISO Wire Cloth</image:title>
      <image:caption>Blank Test Screen Tray for 5in-No. 4 (125-4.75mm) ASTM/ISO Wire Cloth</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/gilson-17qt-steel-material-handling-pan-tsa-163</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/GIL-TSA163.png?v=1786099915</image:loc>
      <image:title>Gilson 17qt. Steel Material Handling Pan, TSA-163</image:title>
      <image:caption>Gilson 17qt. Steel Material Handling Pan, TSA-163</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/coarse-sieve-cleaning-brush-gilson-tsa-172</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/GIL-TSA172_2e9ab4c2-e94b-46f2-9300-36364b505893.png?v=1786099917</image:loc>
      <image:title>Coarse Sieve Cleaning Brush, Gilson, TSA-172</image:title>
      <image:caption>Coarse Sieve Cleaning Brush, Gilson, TSA-172</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/sample-scoop-3-5-oz-cast-aluminum-flat-bottom</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/GIL-TSA183.png?v=1786099919</image:loc>
      <image:title>Sample Scoop, 3.5 oz., Cast Aluminum, Flat Bottom</image:title>
      <image:caption>Sample Scoop, 3.5 oz., Cast Aluminum, Flat Bottom</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/sample-scoop-38-oz-cast-aluminum-round-bottom</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/GIL-TSA188.png?v=1786099920</image:loc>
      <image:title>Sample Scoop, 38 oz., Cast Aluminum, Round Bottom</image:title>
      <image:caption>Sample Scoop, 38 oz., Cast Aluminum, Round Bottom</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/wire-cloth-stainless-steel-2-in-55-0-mm-mesh-opening-36-in-x-36-in-gilson-wc-3s-2</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/GIL-WC-3S-2.png?v=1786099922</image:loc>
      <image:title>Wire Cloth, Stainless Steel. 2 in (55.0 mm) Mesh Opening, 36 in. x 36 in., Gilson, WC-3S 2&quot;&quot;</image:title>
      <image:caption>Wire Cloth, Stainless Steel. 2 in (55.0 mm) Mesh Opening, 36 in. x 36 in., Gilson, WC-3S 2&quot;&quot;</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/wire-cloth-stainless-steel-3-in-75-0-mm-mesh-opening-36-in-x-36-in-gilson-wc-3s-3</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/GIL-WC-3S-3.png?v=1786099923</image:loc>
      <image:title>Wire Cloth, Stainless Steel. 3 in (75.0 mm) Mesh Opening, 36 in. x 36 in., Gilson, WC-3S 3&quot;&quot;</image:title>
      <image:caption>Wire Cloth, Stainless Steel. 3 in (75.0 mm) Mesh Opening, 36 in. x 36 in., Gilson, WC-3S 3&quot;&quot;</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/wire-cloth-stainless-steel-4-in-100-0-mm-mesh-opening-36-in-x-36-in-gilson-wc-3s-4</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/GIL-WC-3S-4.png?v=1786099924</image:loc>
      <image:title>Wire Cloth, Stainless Steel. 4 in (100.0 mm) Mesh Opening, 36 in. x 36 in., Gilson, WC-3S 4&quot;&quot;</image:title>
      <image:caption>Wire Cloth, Stainless Steel. 4 in (100.0 mm) Mesh Opening, 36 in. x 36 in., Gilson, WC-3S 4&quot;&quot;</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/microtitration-plate-96-well-flat-bottom-polystyrene-sterile-individually-wrapped-50-pk-globe-scientific-120330</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/GLB-120330.png?v=1786099925</image:loc>
      <image:title>Microtitration Plate, 96-Well, Flat Bottom, Polystyrene, Non-Sterile, Individually Wrapped, 375 microliters/Well, 50/PK, Globe Scientific, 120330</image:title>
      <image:caption>Microtitration Plate, 96-Well, Flat Bottom, Polystyrene, Non-Sterile, Individually Wrapped, 375 microliters/Well, 50/PK, Globe Scientific, 120330</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/pipet-transfer-large-opening-8-5-ml-with-4-9-ml-draw-non-sterile-2500-cs-globe-scientific-inc-138090</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/GLB-138090.png?v=1786099927</image:loc>
      <image:title>Pipet, Transfer, Large-opening, 8.5 mL with 4.9 mL Draw, Non-Sterile, 2500/CS, Globe Scientific Inc, 138090</image:title>
      <image:caption>Pipet, Transfer, Large-opening, 8.5 mL with 4.9 mL Draw, Non-Sterile, 2500/CS, Globe Scientific Inc, 138090</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/spreader-l-shaped-sterile-individually-wrapped-polystyrene-100-cs</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/GLB-2910_9d5f4626-8ed6-4bc3-b8b0-0c74cebe3fa6.png?v=1786099928</image:loc>
      <image:title>Spreader, L-Shaped, Sterile, Individually-Wrapped, Polystyrene, 100/CS</image:title>
      <image:caption>Spreader, L-Shaped, Sterile, Individually-Wrapped, Polystyrene, 100/CS</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/specimen-container-red-screwcap-sterile-4-oz-individually-wrapped-case-of-100</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/GLB-5912_c49d8ced-4619-4c05-8ab6-382dd882a4fe.png?v=1787715315</image:loc>
      <image:title>Specimen Container, Red ScrewCap, Sterile, 4  oz., Individually Wrapped (Case of 100), Globe Scientific, 5912</image:title>
      <image:caption>Specimen Container, Red ScrewCap, Sterile, 4  oz., Individually Wrapped (Case of 100), Globe Scientific, 5912</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/specimen-container-6-5-oz-with-pour-spout-polypropylene-graduated-500-pk-globe-scientific-5920</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/GLB-5920.png?v=1786099931</image:loc>
      <image:title>Specimen Container, 6.5 oz, with Pour Spout, Polypropylene, Graduated, 500/PK, Globe Scientific, 5920</image:title>
      <image:caption>Specimen Container, 6.5 oz, with Pour Spout, Polypropylene, Graduated, 500/PK, Globe Scientific, 5920</image:caption>
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  <url>
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      <image:caption>Centrifuge Tube, 15 mL, Polystrene, Molded Graduations, Bulk, 1000/CS, Globe Scientific, 6260</image:caption>
    </image:image>
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  <url>
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    <image:image>
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      <image:caption>Pall Syringe Filter Holder, Easy-Pressure , 25 mm, Autoclavable, Fits any Standard Syringe with Luer-Type Fitting, 6/PK, Cytiva, 4320</image:caption>
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  <url>
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    <image:image>
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      <image:caption>Acrodisc Ion Chromatography Syringe Filters, Pall Life Sciences, 13 mm, 0.2 Micrometers</image:caption>
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  <url>
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    <image:image>
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      <image:caption>Acrodisc Ion Chromatography Syringe Filters, Pall Life Sciences, 22 mm, 0.2 Micrometers</image:caption>
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  </url>
  <url>
    <loc>https://preiser.com/products/membrane-disc-filters-25-mm-diameter-0-45um-plain-non-sterile</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
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      <image:caption>Membrane Disc Filters, 25 mm Diameter, 0.45um, Plain, Non-Sterile</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/a-e-glass-fiber-filters-76-mm-diameter-1-0-micron-retention-fine-porosity-fast-flow-rate-100-pk</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/GLM-61663.png?v=1786099938</image:loc>
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      <image:caption>A/E Glass Fiber Filters, 76 mm Diameter, 1.0 Micron Retention, Fine Porosity, Fast Flow Rate, 100/PK</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/glass-fiber-filters-tclp-14-2-cm-diameter-0-7-micrometers-for-use-in-us-epa-method-1311-toxicity-characteristics-leaching-procedure-50-pk</loc>
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    <changefreq>daily</changefreq>
    <image:image>
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      <image:caption>Glass Fiber Filters, TCLP, 14.2 cm Diameter, 0.7 Micrometers, For Use in US EPA Method 1311 Toxicity Characteristics Leaching Procedure, 50/PK</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/versapor-membrane-disc-filters-pall-life-sciences-47-mm-0-45-um</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/GLM-66408.png?v=1786099941</image:loc>
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      <image:caption>Versapor Membrane Disc Filters, Pall Life Sciences, 47 mm, 0.45 um</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/m-fc-broth-fecal-coliforms-with-rosolic-box-of-20-2-ml-wide-mouth-glass-ampules</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/GLM-68101.png?v=1786099942</image:loc>
      <image:title>M-FC Broth, Fecal Coliforms, with Rosolic (Box of 20 - 2 mL Wide Mouth Glass Ampules)</image:title>
      <image:caption>M-FC Broth, Fecal Coliforms, with Rosolic (Box of 20 - 2 mL Wide Mouth Glass Ampules)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/mf-endo-broth-total-coliforms-2-ml-package-of-50</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/GLM-68105-01.png?v=1786099943</image:loc>
      <image:title>MF-Endo Broth, Total Coliforms, 2 mL (Package of 50)</image:title>
      <image:caption>MF-Endo Broth, Total Coliforms, 2 mL (Package of 50)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/rg600-tipping-bucket-rain-gauge-8-inch-standard-units-0-01-inch-per-tip-global-water-instrumentation-ek0000</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/GLW-RG600_33844c78-abc6-4176-b012-5cd52943a64d.png?v=1786099945</image:loc>
      <image:title>RG600 Tipping Bucket Rain Gauge, 8 inch, Standard Units-0.01 Inch Per Tip, Global Water Instrumentation, EK0000</image:title>
      <image:caption>RG600 Tipping Bucket Rain Gauge, 8 inch, Standard Units-0.01 Inch Per Tip, Global Water Instrumentation, EK0000</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/spx-050-inline-low-flow-meter-1-2-inch-global-water-instrumentation-inc-bt0050</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/GWI-BT00-50_9e21b718-36c5-4f52-b663-6fe32a4817fc.png?v=1786099946</image:loc>
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      <image:caption>SPX-050 Inline Low Flow Meter, 1/2 inch, Global Water Instrumentation, Inc., BT0050</image:caption>
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  </url>
  <url>
    <loc>https://preiser.com/products/spx-100-inline-low-flow-meter-1-inch-global-water-instrumentation-inc-bt0100</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
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      <image:caption>SPX-100 Inline Low Flow Meter, 1 inch, Global Water Instrumentation, Inc., BT0100</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/tensette%C2%AE-pipet-0-1-1-0-ml</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAC-19700-01.png?v=1786099949</image:loc>
      <image:title>Tensette® Pipet, 0.1-1.0 mL</image:title>
      <image:caption>Tensette® Pipet, 0.1-1.0 mL</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/cod-vial-0-1500-ppm-hach-2125915</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAC-21259-15_d1179b88-8266-4ab6-86ac-d2878cacba9a.png?v=1787283418</image:loc>
      <image:title>COD Vial, 0-1500 ppm, Hach 2125915</image:title>
      <image:caption>COD Vial, 0-1500 ppm, Hach 2125915</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/turbidity-standards-stablcal-stablized-formazin-0-1-20-200-1000-and-4000-ntu-hach-2662105</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAC-26621-05.png?v=1786506511</image:loc>
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      <image:caption>Turbidity Standards, Stablcal Stablized Formazin, &lt;0.1, 20, 200, 1000 and 4000 NTU, HACH, 2662105</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/intellical-ldo101-laboratory-luminescent-optical-dissolved-oxygen-do-sensor-3-m-cable-hach-ldo10103</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
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      <image:title>IntelliCAL LDO101 Laboratory Luminescent/Optical Dissolved Oxygen (DO) Sensor, 3 m Cable, HACH LDO10103</image:title>
      <image:caption>IntelliCAL LDO101 Laboratory Luminescent/Optical Dissolved Oxygen (DO) Sensor, 3 m Cable, HACH LDO10103</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/hach-titraver-edta-hardness-titrant-0-200-n-0-100m-29-oz</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-102133.png?v=1786099958</image:loc>
      <image:title>HACH TitraVer (EDTA) Hardness Titrant 0.200 N, 0.100M, 29 oz</image:title>
      <image:caption>HACH TitraVer (EDTA) Hardness Titrant 0.200 N, 0.100M, 29 oz</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/hach-magnesium-sulfate-standard-29-ml-for-calcium-titration-and-hardness-monitor-10000-mg-l-as-caco3-for-sp510</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
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      <image:title>HACH Magnesium Sulfate Standard, 29 mL, for Calcium Titration and Hardness Monitor, 10000 mg/L as CaCO3, for SP510</image:title>
      <image:caption>HACH Magnesium Sulfate Standard, 29 mL, for Calcium Titration and Hardness Monitor, 10000 mg/L as CaCO3, for SP510</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/ferrous-iron-reagent-powder-pillows-100-pk-hach-103769</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-1037-69_34c047a5-4531-43a7-ab0f-2e162ef9fe13.png?v=1786506515</image:loc>
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      <image:caption>Ferrous Iron Reagent Powder Pillows, 100/PK, HACH, 103769</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/chloride-2-indicator-powder-pillows-100-pk-hach-104399</loc>
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    <changefreq>daily</changefreq>
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      <image:caption>Chloride 2 Indicator Powder Pillows, 100/PK, HACH, 104399</image:caption>
    </image:image>
  </url>
  <url>
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    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
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      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-1057-66_6f57728c-1830-4226-aef6-be170949a583.png?v=1787783619</image:loc>
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      <image:caption>Chloride 2 Indicator Powder Pillows, 100 mL, 50/PK, HACH, 105766</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/hach-sulfite-standard-solution-15-mg-l-as-so3-equivalent-500-ml</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-1106-50.png?v=1786099968</image:loc>
      <image:title>HACH Sulfite Standard Solution, 15 mg/L as SO3 (Equivalent), 500 mL</image:title>
      <image:caption>HACH Sulfite Standard Solution, 15 mg/L as SO3 (Equivalent), 500 mL</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/silica-standard-solution-1-mg-l-as-sio2-nist-500-ml-poly-bottle-hach-110649</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
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      <image:caption>Silica Standard Solution, 1 mg/L as SiO2 (NIST), 500 mL Poly Bottle, HACH, 110649</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/chromaver-3-chromium-reagent-powder-pillows-25-ml-100-pk-hach-1206699</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-12066.png?v=1786506521</image:loc>
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      <image:caption>ChromaVer 3 Chromium Reagent Powder Pillows, 25 mL, 100/PK, HACH 1206699</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/silicone-oil-15-ml-screw-cap-dropper-bottle-hach-126936</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-1269-36.png?v=1786506523</image:loc>
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      <image:caption>Silicone Oil, 15 mL Screw Cap Dropper Bottle, HACH, 126936</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/chromaver-3-chromium-reagent-powder-pillows-5-or-10-ml-samples-100-pk-1271099</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
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      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-12710-01_ce5adcc4-ca91-458b-ab60-d1ed94993593.png?v=1787783621</image:loc>
      <image:title>ChromaVer 3 Chromium Reagent Powder Pillows, 5 or 10 mL Samples, 100/PK, 1271099</image:title>
      <image:caption>ChromaVer 3 Chromium Reagent Powder Pillows, 5 or 10 mL Samples, 100/PK, 1271099</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/hach-copper-standard-solution-10-mg-l-as-cu-nist-100-ml-measured-dropper-bottle</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-12932_5a96e237-472e-4824-9f7b-8c550129f41d.png?v=1786099977</image:loc>
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      <image:caption>HACH Copper Standard Solution, 10 mg/L as Cu, NIST, 100 mL Measured Dropper Bottle</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/sample-cell-glass-1-in-square-25-ml-unmatched-pair-2-pk-hach-1353702</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
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      <image:caption>Sample Cell, Glass, 1 in. Square, 25 mL, Unmatched Pair, 2/PK, HACH, 1353702</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/cyclohexanone-100-ml-amber-glass-bottle-hach-1403332</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-14033-32_77aabb80-bf32-46bf-8086-e3eaf48dadb8.png?v=1786506526</image:loc>
      <image:title>Cyclohexanone, 100 mL Amber Glass Bottle, HACH, 1403332</image:title>
      <image:caption>Cyclohexanone, 100 mL Amber Glass Bottle, HACH, 1403332</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/nitraver%C2%AE-5-nitrate-reagent-powder-pillows-5-ml-100-pk-hach-1403599</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-14035-99_ee806330-ecec-41c1-8cf1-c5194bc2838d.png?v=1786099981</image:loc>
      <image:title>NitraVer® 5 Nitrate Reagent Powder Pillows, 5 mL, 100/PK, HACH, 1403599</image:title>
      <image:caption>NitraVer® 5 Nitrate Reagent Powder Pillows, 5 mL, 100/PK, HACH, 1403599</image:caption>
    </image:image>
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  <url>
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  <url>
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  <url>
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  <url>
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    <changefreq>daily</changefreq>
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      <image:caption>HACH DPD Total Chlorine Reagent Powder Pillows, 5 mL Sample, 100/PK</image:caption>
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  <url>
    <loc>https://preiser.com/products/hach-dpd-free-chlorine-reagent-powder-pillows-5-ml-sample-pk-100</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
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      <image:caption>HACH DPD Free Chlorine Reagent Powder Pillows, 5 mL Sample, PK/100</image:caption>
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  </url>
  <url>
    <loc>https://preiser.com/products/nitriver-3-nitrite-reagent-powder-pillows-5-ml-100-pk-hach-1407899</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
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      <image:caption>NitriVer 3 Nitrite Reagent Powder Pillows, 5 mL, 100/PK, HACH, 1407899</image:caption>
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  </url>
  <url>
    <loc>https://preiser.com/products/ec-medium-mpn-tubes-15-pk-hach-1410415</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
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      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-14104-15_2d2441dc-0960-43fb-9e11-7bed33bcb087.png?v=1786506527</image:loc>
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      <image:caption>EC Medium MPN Tubes, 15/PK, HACH, 1410415</image:caption>
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  </url>
  <url>
    <loc>https://preiser.com/products/molyver-1-reagent-25-ml-powder-pillows-package-of-100-non-regulated</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
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      <image:caption>MolyVer-1 Reagent, 25 mL, Powder Pillows (Package of 100) (Non-Regulated)</image:caption>
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  </url>
  <url>
    <loc>https://preiser.com/products/molyver-2-reagent-25-ml-powder-pillows-package-of-100-non-regulated</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
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      <image:caption>MolyVer-2 Reagent, 25 mL, Powder Pillows (Package of 100) (Non-Regulated)</image:caption>
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  </url>
  <url>
    <loc>https://preiser.com/products/bod-nutrient-buffer-pillows-each-0-5-ml-pillow-prepares-300-ml-of-bod5-dilution-water-50-pk</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-14160-66.png?v=1786099999</image:loc>
      <image:title>BOD Nutrient Buffer Pillows, Each 0.5 mL Pillow Prepares 300 mL of BOD5 Dilution Water, 50/PK</image:title>
      <image:caption>BOD Nutrient Buffer Pillows, Each 0.5 mL Pillow Prepares 300 mL of BOD5 Dilution Water, 50/PK</image:caption>
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  <url>
    <loc>https://preiser.com/products/molyver-3-reagent-25-ml-powder-pillows-package-of-100-non-regulated</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
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      <image:caption>MolyVer-3 Reagent, 25 mL, Powder Pillows (Package of 100) (Non-Regulated)</image:caption>
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  <url>
    <loc>https://preiser.com/products/cuver-1-copper-reagent-powder-pillows-25-ml-100-pk-hach-1418801</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
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      <image:caption>CuVer 1 Copper Reagent Powder Pillows, 25 mL, 100/PK, HACH, 1418801</image:caption>
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  </url>
  <url>
    <loc>https://preiser.com/products/s5000-phosphate-molybdovanadate-reagent-2-9-l-bottle-8-un3264-p-g-iii</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-14207-03.png?v=1786100003</image:loc>
      <image:title>S5000 Phosphate Molybdovanadate Reagent, 2.9 L Bottle (8, UN3264, P.G. III)</image:title>
      <image:caption>S5000 Phosphate Molybdovanadate Reagent, 2.9 L Bottle (8, UN3264, P.G. III)</image:caption>
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  </url>
  <url>
    <loc>https://preiser.com/products/chlorine-standard-solution-50-75-mg-l-as-cl2-10-ml-ampules-nist-sold-by-each-each-16-ampules</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-14268-10_47b64276-ebec-4130-9a10-e96489399b7e.png?v=1787715321</image:loc>
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      <image:caption>Chlorine Standard Solution 50-75 mg/L as Cl2, 10 mL Ampules, NIST (Sold by Each / Each = 16 Ampules)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/volatile-acid-standard-solution-62-500-mg-l-as-acetic-acid-16-pk-10-ml-voluette-ampules-hach-1427010</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-1427010.png?v=1786506531</image:loc>
      <image:title>Volatile Acid Standard Solution, 62,500 mg/L as Acetic Acid, 16/PK, 10 mL Voluette Ampules, HACH, 1427010</image:title>
      <image:caption>Volatile Acid Standard Solution, 62,500 mg/L as Acetic Acid, 16/PK, 10 mL Voluette Ampules, HACH, 1427010</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/chlorine-free-total-test-kit-model-cn-70-color-disc-100-tests</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-14542-00_bf4ca3a2-ff44-4117-a2ae-844c4fa976b8.png?v=1786100007</image:loc>
      <image:title>Chlorine (Free &amp; Total) Test Kit, Model CN-70, Color Disc, 100 Tests</image:title>
      <image:caption>Chlorine (Free &amp; Total) Test Kit, Model CN-70, Color Disc, 100 Tests</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/hach-potassium-iodide-solution-20-100-ml</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-1456842.png?v=1786100009</image:loc>
      <image:title>HACH Potassium Iodide Solution, 20%, 100 mL</image:title>
      <image:caption>HACH Potassium Iodide Solution, 20%, 100 mL</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/hach-ascorbic-acid-powder-pillows-100-pk</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-14577-99_9e1eb0a6-5f51-4519-80e8-93dc60ce5024.png?v=1786100010</image:loc>
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      <image:caption>HACH Ascorbic Acid Powder Pillows, 100/PK</image:caption>
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  <url>
    <loc>https://preiser.com/products/ph-test-kit-color-disc-4-10-ph-300-test-1470-11</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
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      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-147011_3c2888ed-c030-4de4-8e8d-518e74a45d30.png?v=1786100015</image:loc>
      <image:title>pH Test Kit Color Disc 4-10 pH 300 Test, 1470-11</image:title>
      <image:caption>pH Test Kit Color Disc 4-10 pH 300 Test, 1470-11</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/bod-nutrient-buffer-pillows-each-pillow-prepares-3-liters-of-dilution-water-50-pk</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-14861-66.png?v=1786100016</image:loc>
      <image:title>BOD Nutrient Buffer Pillows, Each Pillow Prepares 3 Liters of Dilution Water, 50/PK</image:title>
      <image:caption>BOD Nutrient Buffer Pillows, Each Pillow Prepares 3 Liters of Dilution Water, 50/PK</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/bod-nutrient-buffer-pillows-use-for-preparing-bod-dilution-water-each-pillow-prepares-6-liters-of-dilution-water-50-pk-non-regulated</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-14862-66_f9b68eac-4a48-4ee3-b160-5b057e2c6dea.png?v=1786100018</image:loc>
      <image:title>BOD Nutrient Buffer Pillows, Use for Preparing BOD Dilution Water, Each Pillow Prepares 6 Liters of Dilution Water, 50/PK (Non-Regulated)</image:title>
      <image:caption>BOD Nutrient Buffer Pillows, Use for Preparing BOD Dilution Water, Each Pillow Prepares 6 Liters of Dilution Water, 50/PK (Non-Regulated)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/hach-bod-nutrient-buffer-pillows-19-ml-of-concentrate-to-make-19-l-25-pk</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-14863-98_b9b042ea-5b4a-496c-8564-f371e11ff77e.png?v=1786678489</image:loc>
      <image:title>HACH BOD Nutrient Buffer Pillows, 19 mL of Concentrate to Make 19 L, 25/PK</image:title>
      <image:caption>HACH BOD Nutrient Buffer Pillows, 19 mL of Concentrate to Make 19 L, 25/PK</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/bod-standard-solutions-10-ml-ampule-300-mg-l-glucose-plus-glutamic-acid</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-14865-10.png?v=1786100021</image:loc>
      <image:title>BOD Standard Solutions, 10 mL Ampule. 300 mg/L Glucose Plus Glutamic Acid</image:title>
      <image:caption>BOD Standard Solutions, 10 mL Ampule. 300 mg/L Glucose Plus Glutamic Acid</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/container-support-hach-1502</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-1502.png?v=1786506532</image:loc>
      <image:title>Container Support, HACH, 1502</image:title>
      <image:caption>Container Support, HACH, 1502</image:caption>
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  </url>
  <url>
    <loc>https://preiser.com/products/hach-ammonia-standard-solution-10-mg-l-0-5-mg-l-as-nh3-n-500-ml</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
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      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-15349_d600feed-4f33-4a82-a0b0-2f8ad5367b07.png?v=1786100025</image:loc>
      <image:title>HACH Ammonia Standard Solution, 10 mg/L ± 0.5 mg/L as NH3-N, 500 mL</image:title>
      <image:caption>HACH Ammonia Standard Solution, 10 mg/L ± 0.5 mg/L as NH3-N, 500 mL</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/phenolphthalein-indicator-solution-5-g-l-100-ml-mdb-apha-hach-16232</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-16232.png?v=1786506534</image:loc>
      <image:title>Phenolphthalein Indicator Solution, 5 g/L, 100 mL MDB (APHA), HACH, 16232</image:title>
      <image:caption>Phenolphthalein Indicator Solution, 5 g/L, 100 mL MDB (APHA), HACH, 16232</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/digital-titrator-0-00125-ml-digit-hach-1690001</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-16900-01_264fc767-7649-4bec-a6a3-bba2dbde4a44.png?v=1786506535</image:loc>
      <image:title>Digital Titrator, 0.00125 mL/digit, HACH, 1690001</image:title>
      <image:caption>Digital Titrator, 0.00125 mL/digit, HACH, 1690001</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/delivery-tubes-for-digital-titrator-5-pk</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-17205-00_34bbdcfd-cd72-425e-8b9f-aa62e474498b.png?v=1786100029</image:loc>
      <image:title>Delivery Tubes for Digital Titrator, 5/PK</image:title>
      <image:caption>Delivery Tubes for Digital Titrator, 5/PK</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/rochelle-salt-solution-29-ml-dropper-bottle-hach-172533</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-1725-33_f26d34b6-f3e2-4341-b3f5-1b51ae791918.png?v=1786506537</image:loc>
      <image:title>Rochelle Salt Solution, 29 mL Dropper Bottle, HACH, 172533</image:title>
      <image:caption>Rochelle Salt Solution, 29 mL Dropper Bottle, HACH, 172533</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/rochelle-salt-solution-500-ml-poly-bottle-hach-172549</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-172549.png?v=1786506539</image:loc>
      <image:title>Rochelle Salt Solution, 500 mL Poly Bottle, HACH, 172549</image:title>
      <image:caption>Rochelle Salt Solution, 500 mL Poly Bottle, HACH, 172549</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/glass-viewing-tube-6-pk-hach-173006</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-1730-06.png?v=1786506541</image:loc>
      <image:title>Glass Viewing Tube, 6/PK, HACH, 173006</image:title>
      <image:caption>Glass Viewing Tube, 6/PK, HACH, 173006</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/hach-ammonia-standard-solution-1-mg-l-0-03-mg-l-500-ml</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-1891-49.png?v=1786100036</image:loc>
      <image:title>HACH Ammonia Standard Solution, 1 mg/L +/- 0.03 mg/L, 500 mL</image:title>
      <image:caption>HACH Ammonia Standard Solution, 1 mg/L +/- 0.03 mg/L, 500 mL</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/lamp-assembly-ge-1630-for-1720d-1720e-low-range-turbidimeters</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
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    <image:image>
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      <image:caption>Lamp Assembly, GE 1630, for 1720D/1720E Low-Range Turbidimeters</image:caption>
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      <image:caption>Amino Acid Reagent, for Phosphate Determinations, 100 Tests (Non-Regulated)</image:caption>
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  <url>
    <loc>https://preiser.com/products/molybdate-3-reagent-for-silica-analysis-2-9-l-bottle-8-un3264-p-g-iii</loc>
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      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-1995-03.png?v=1786100044</image:loc>
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    <image:image>
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      <image:caption>HACH Molybdate 3 Reagent, 100 mL</image:caption>
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  <url>
    <loc>https://preiser.com/products/molybdate-3-reagent-1-l-hach-199553</loc>
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    <changefreq>daily</changefreq>
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      <image:caption>Molybdate 3 Reagent, 1 L, HACH 199553</image:caption>
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  <url>
    <loc>https://preiser.com/products/phenylarsine-oxide-pao-standard-solution-0-00564-n-100-ml-hach-199942</loc>
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    <image:image>
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  <url>
    <loc>https://preiser.com/products/sulfuric-acid-standard-solution-0-020-n-n-50-4-l</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
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      <image:caption>Sulfuric Acid Standard Solution, 0.020 N (N/50), 4 L</image:caption>
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  <url>
    <loc>https://preiser.com/products/edta-standard-solution-for-hardness-determination-0-0200n-4l</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-205-56.png?v=1786100055</image:loc>
      <image:title>EDTA Standard Solution for Hardness Determination, 0.0200N, 4L</image:title>
      <image:caption>EDTA Standard Solution for Hardness Determination, 0.0200N, 4L</image:caption>
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  <url>
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    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-20553.png?v=1786100058</image:loc>
      <image:title>HACH TitraVer EDTA Standard Solution, 0.0200 N, 1 L</image:title>
      <image:caption>HACH TitraVer EDTA Standard Solution, 0.0200 N, 1 L</image:caption>
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  <url>
    <loc>https://preiser.com/products/molybdovanadate-reagent-100-ml-marked-dropper-bottle</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
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      <image:title>Molybdovanadate Reagent, 100 mL Marked Dropper Bottle</image:title>
      <image:caption>Molybdovanadate Reagent, 100 mL Marked Dropper Bottle</image:caption>
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  <url>
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    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
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      <image:caption>HACH Molybdovanadate Reagent, 500 mL</image:caption>
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  <url>
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    <changefreq>daily</changefreq>
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      <image:caption>HACH Potassium Persulfate Powder Pillows, 100/PK</image:caption>
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  <url>
    <loc>https://preiser.com/products/turbidity-sample-cell-1-in-round-glass-30-ml-with-cap</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
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      <image:caption>Turbidity Sample Cell, 1 in. Round Glass, 30 mL, with Cap</image:caption>
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  <url>
    <loc>https://preiser.com/products/chloride-drop-count-titration-test-kit-model-cd-51-hach-208601</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
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      <image:title>Chloride Drop-Count Titration Test Kit, Model CD-51, HACH, 208601</image:title>
      <image:caption>Chloride Drop-Count Titration Test Kit, Model CD-51, HACH, 208601</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/silica-standard-solution-500ug-l-bottle-of-2-9-l-non-regulated</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
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      <image:caption>Silica Standard Solution, 500ug/L (Bottle of 2.9 L) (Non-Regulated)</image:caption>
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  </url>
  <url>
    <loc>https://preiser.com/products/silica-standard-solution-0-50-mg-l-3-78-l-hach-2100817</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-2100817.png?v=1786100072</image:loc>
      <image:title>Silica Standard Solution, 0.50 mg/L, 3.78 L, HACH, 2100817</image:title>
      <image:caption>Silica Standard Solution, 0.50 mg/L, 3.78 L, HACH, 2100817</image:caption>
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  <url>
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    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
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  <url>
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    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
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    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
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      <image:caption>DPD Total Chlorine Reagent, 10 mL Sample, Powder Pillows (Package of 1000)</image:caption>
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  <url>
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    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
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      <image:caption>DPD Total Chlorine Reagent, 10 mL Sample, Powder Pillows, Range: up to 2.00 mg/L</image:caption>
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  <url>
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    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
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      <image:caption>HACH FerroVer Iron Reagent Powder Pillows, 10 mL Sample, 100/PK</image:caption>
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  <url>
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    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
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      <image:caption>PhosVer 3 Phosphate Reagent Powder Pillows, 10 mL Sample Size, 50/PK, HACH, 2106046</image:caption>
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  <url>
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    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
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      <image:caption>PhosVer 3 Phosphate Reagent, 10 mL Sample Size (Package of 100 Powder Pillows)</image:caption>
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    <loc>https://preiser.com/products/hach-nitraver-5-nitrate-reagent-powder-pillows-10-ml-sample-100-pk</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-21061-69.png?v=1786100087</image:loc>
      <image:title>HACH NitraVer 5 Nitrate Reagent Powder Pillows, 10 mL Sample, 100/PK</image:title>
      <image:caption>HACH NitraVer 5 Nitrate Reagent Powder Pillows, 10 mL Sample, 100/PK</image:caption>
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  </url>
  <url>
    <loc>https://preiser.com/products/zincover-5-zinc-reagent-powder-pillows-20-ml-100-pk-hach-2106669</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
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      <image:title>ZincoVer 5 Zinc Reagent Powder Pillows, 20 mL, 100/PK, HACH 2106669</image:title>
      <image:caption>ZincoVer 5 Zinc Reagent Powder Pillows, 20 mL, 100/PK, HACH 2106669</image:caption>
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  <url>
    <loc>https://preiser.com/products/hach-sulfaver-4-sulfate-reagent-powder-pillows-10-ml-sample-100-pk</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-21067-69.png?v=1786100091</image:loc>
      <image:title>HACH SulfaVer 4 Sulfate Reagent Powder Pillows, 10 mL Sample, 100/PK</image:title>
      <image:caption>HACH SulfaVer 4 Sulfate Reagent Powder Pillows, 10 mL Sample, 100/PK</image:caption>
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  <url>
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    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
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      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-21069-69_e5351fa2-099e-4d35-bfb4-14981532a44a.png?v=1786506557</image:loc>
      <image:title>CyaniVer 4 Cyanide Reagent Powder Pillows, 10 mL, PK/100--Pyridine-Pyrazolone Method</image:title>
      <image:caption>CyaniVer 4 Cyanide Reagent Powder Pillows, 10 mL, PK/100--Pyridine-Pyrazolone Method</image:caption>
    </image:image>
  </url>
  <url>
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    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
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      <image:title>Nitrite High Range, NitriVer-2 Reagent , 10 mL Samples, Powder Pillows (Non-Regulated)</image:title>
      <image:caption>Nitrite High Range, NitriVer-2 Reagent , 10 mL Samples, Powder Pillows (Non-Regulated)</image:caption>
    </image:image>
  </url>
  <url>
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    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
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      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-21076-69_0336592c-2ba9-4699-88ef-0122ae7bfebe.png?v=1786100097</image:loc>
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    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/sodium-periodate-10-ml-powder-pillows-for-manganese-cold-periodate-method-10-ml-sample-100-pk</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-21077-69.png?v=1786100099</image:loc>
      <image:title>Sodium Periodate, 10 mL Powder Pillows, for Manganese, Cold Periodate Method, 10 mL sample, 100/PK</image:title>
      <image:caption>Sodium Periodate, 10 mL Powder Pillows, for Manganese, Cold Periodate Method, 10 mL sample, 100/PK</image:caption>
    </image:image>
  </url>
  <url>
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    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
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      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-21132_24842e2e-800b-487c-b22c-c49980145fe1.png?v=1786506559</image:loc>
      <image:title>Phenol Red Indicator Solution, 100 mL Market Dropper Bottle, HACH, 21132</image:title>
      <image:caption>Phenol Red Indicator Solution, 100 mL Market Dropper Bottle, HACH, 21132</image:caption>
    </image:image>
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  <url>
    <loc>https://preiser.com/products/hach-nessler-reagent-500-ml-for-ammonia-nitrogen</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-21194-49_94e9f084-2a8a-40a8-91d8-ee5dd8866c97.png?v=1787715330</image:loc>
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      <image:caption>HACH Nessler Reagent, 500 mL, for Ammonia Nitrogen</image:caption>
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  <url>
    <loc>https://preiser.com/products/hach-alkaline-cyanide-reagent-500-ml</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-21223-49.png?v=1786100105</image:loc>
      <image:title>HACH Alkaline Cyanide Reagent, 500 mL</image:title>
      <image:caption>HACH Alkaline Cyanide Reagent, 500 mL</image:caption>
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  <url>
    <loc>https://preiser.com/products/alkaline-cyanide-reagent-50-ml-self-contained-dropper-bottle-hach-2122326-representative-image</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-2122326.png?v=1786100107</image:loc>
      <image:title>Alkaline Cyanide Reagent, 50 mL Self-Contained Dropper Bottle, HACH, 2122326 [Representative Image]</image:title>
      <image:caption>Alkaline Cyanide Reagent, 50 mL Self-Contained Dropper Bottle, HACH, 2122326 [Representative Image]</image:caption>
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  <url>
    <loc>https://preiser.com/products/pan-indicator-solution-0-1-50-ml-self-contained-dropper-bottle-hach-2122426-representative-image</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-2122426_fdf1b023-f6b8-462e-b4ff-159178c3e28b.png?v=1786100109</image:loc>
      <image:title>PAN Indicator Solution, 0.1%, 50 mL Self-Contained Dropper Bottle, HACH, 2122426 [Representative Image]</image:title>
      <image:caption>PAN Indicator Solution, 0.1%, 50 mL Self-Contained Dropper Bottle, HACH, 2122426 [Representative Image]</image:caption>
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  </url>
  <url>
    <loc>https://preiser.com/products/phosver-3-phosphate-reagent-25-ml-sample-size-bottle-of-100-powder-pillows</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-2125-01_8a99db00-7d67-479b-bbd2-63f1924e4dc8.png?v=1786100110</image:loc>
      <image:title>PhosVer 3 Phosphate Reagent, 25 mL Sample Size (Bottle of 100 Powder Pillows)</image:title>
      <image:caption>PhosVer 3 Phosphate Reagent, 25 mL Sample Size (Bottle of 100 Powder Pillows)</image:caption>
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  </url>
  <url>
    <loc>https://preiser.com/products/triazole-reagent-for-the-analysis-of-benzotriazole-1-16-mg-l-or-tolyltriazole-1-20-mg-l-non-regulated</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-21412-99.png?v=1786100111</image:loc>
      <image:title>Triazole Reagent, for the Analysis of Benzotriazole (1-16 mg/L) or Tolyltriazole (1-20 mg/L) (Non-Regulated)</image:title>
      <image:caption>Triazole Reagent, for the Analysis of Benzotriazole (1-16 mg/L) or Tolyltriazole (1-20 mg/L) (Non-Regulated)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/benzotriazole-standard-solution-500-mg-l-sold-by-each-each-100-ml-bottle-non-regulated</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-21413-42_45509a7c-52b7-425d-af89-d65aaa6313aa.png?v=1786100113</image:loc>
      <image:title>Benzotriazole Standard Solution, 500 mg/L (Sold by Each / Each = 100 mL Bottle) (Non-Regulated)</image:title>
      <image:caption>Benzotriazole Standard Solution, 500 mg/L (Sold by Each / Each = 100 mL Bottle) (Non-Regulated)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/buffer-dilution-water-pillows-makes-1-l-per-pillow-package-of-25</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-21431-66_be04f398-e727-40a7-a8fe-3c9d5de73d0f.png?v=1786100115</image:loc>
      <image:title>Buffer Dilution Water, Pillows (makes 1 L per pillow) (Package of 25)</image:title>
      <image:caption>Buffer Dilution Water, Pillows (makes 1 L per pillow) (Package of 25)</image:caption>
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  </url>
  <url>
    <loc>https://preiser.com/products/pipet-tips-for-tensette-pipet-1970001-0-1-1-0-ml-1000-pk</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-21856-28.png?v=1786100116</image:loc>
      <image:title>Pipet Tips, for TenSette Pipet 1970001, 0.1-1.0 mL, 1000/PK</image:title>
      <image:caption>Pipet Tips, for TenSette Pipet 1970001, 0.1-1.0 mL, 1000/PK</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/pipet-tips-for-tensette-pipet-1970001-0-1-1-0-ml-50-pk-hach-2185696</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-21856-96.png?v=1786506561</image:loc>
      <image:title>Pipet Tips, for TenSette Pipet 1970001, 0.1-1.0 mL, 50/PK, HACH, 2185696</image:title>
      <image:caption>Pipet Tips, for TenSette Pipet 1970001, 0.1-1.0 mL, 50/PK, HACH, 2185696</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/methyl-purple-indicator-solution-100-ml-marked-dropper-bottle-hach-2193432</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-2193432_87425337-4d97-4d05-8d1a-62df3ecfea29.png?v=1786506562</image:loc>
      <image:title>Methyl Purple Indicator Solution, 100 mL Marked Dropper Bottle, HACH, 2193432</image:title>
      <image:caption>Methyl Purple Indicator Solution, 100 mL Marked Dropper Bottle, HACH, 2193432</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/dpd-free-chlorine-reagent-powder-pillows-5-ml-sample-size-50-pk-hach-2197846</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-21978-46.png?v=1786506564</image:loc>
      <image:title>DPD Free Chlorine Reagent Powder Pillows, 5 mL Sample Size, 50/PK, HACH, 2197846</image:title>
      <image:caption>DPD Free Chlorine Reagent Powder Pillows, 5 mL Sample Size, 50/PK, HACH, 2197846</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/dpd-total-chlorine-reagent-powder-pillows-5-ml-sample-size-50-pk-hach-2198246</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-21982-46_049c5115-875d-435a-87bd-4efd668ba37b.png?v=1786506566</image:loc>
      <image:title>DPD Total Chlorine Reagent Powder Pillows, 5 mL Sample Size, 50/PK, HACH, 2198246</image:title>
      <image:caption>DPD Total Chlorine Reagent Powder Pillows, 5 mL Sample Size, 50/PK, HACH, 2198246</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/mercuric-thiocyanate-solution-sold-by-each-each-200-ml-bottle</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-2212129.png?v=1786100126</image:loc>
      <image:title>Mercuric Thiocyanate Solution (Sold by Each / Each = 200 mL  Bottle)</image:title>
      <image:caption>Mercuric Thiocyanate Solution (Sold by Each / Each = 200 mL  Bottle)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/ferric-ion-solution-100-ml-amber-glass-bottle-hach-2212242</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-2212242_3dc9e5d7-94f7-4410-ba93-eec449242cd1.png?v=1786506569</image:loc>
      <image:title>Ferric Ion Solution, 100 mL Amber Glass Bottle, HACH, 2212242</image:title>
      <image:caption>Ferric Ion Solution, 100 mL Amber Glass Bottle, HACH, 2212242</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/nitriver-2-nitrite-reagent-powder-pillows-range-0-150-mg-l-non-regulated</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-2219-69_25527f8d-321a-4170-b6b6-8f8c8a244880.png?v=1786100130</image:loc>
      <image:title>NitriVer-2 Nitrite Reagent, Powder Pillows, Range: 0 - 150 mg/L (Non-Regulated)</image:title>
      <image:caption>NitriVer-2 Nitrite Reagent, Powder Pillows, Range: 0 - 150 mg/L (Non-Regulated)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/buffer-powder-pillows-ph-4-01-0-02-at-25-degrees-c-250-pk-hach-2226964</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-22269-64_af4ba76c-80b4-4db9-924a-ec9ab954656e.png?v=1786506570</image:loc>
      <image:title>Buffer Powder Pillows pH 4.01 +/- 0.02 at 25 degrees C, 250/PK, HACH, 2226964</image:title>
      <image:caption>Buffer Powder Pillows pH 4.01 +/- 0.02 at 25 degrees C, 250/PK, HACH, 2226964</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/buffer-powder-pillows-color-coded-yellow-ph-7-00-0-02-at-25-degrees-c-250-pk-2227064</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-22270-64.png?v=1786506572</image:loc>
      <image:title>Buffer Powder Pillows, Color-coded Yellow, pH 7.00 +/- 0.02,  at 25 degrees C, 250/PK, 2227064</image:title>
      <image:caption>Buffer Powder Pillows, Color-coded Yellow, pH 7.00 +/- 0.02,  at 25 degrees C, 250/PK, 2227064</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/buffer-powder-pillows-color-coded-blue-ph-10-01-0-02-at-25-degrees-c-250-pk-hach-2227164</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-22271-64.png?v=1786506574</image:loc>
      <image:title>Buffer Powder Pillows, Color-coded Blue, pH 10.01 +/- 0.02, at 25 degrees C, 250/PK, HACH, 2227164</image:title>
      <image:caption>Buffer Powder Pillows, Color-coded Blue, pH 10.01 +/- 0.02, at 25 degrees C, 250/PK, HACH, 2227164</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/sulfite-1-reagent-powder-pillows-100-pk-hach-223099</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-2230-99.png?v=1786100137</image:loc>
      <image:title>Sulfite 1 Reagent Powder Pillows, 100/PK, HACH 223099</image:title>
      <image:caption>Sulfite 1 Reagent Powder Pillows, 100/PK, HACH 223099</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/chlorine-free-total-test-kit-model-cn-66-color-disc-0-1-3-5-mg-l-100-tests</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-2231-01_1834220d-81f4-403e-a55f-f000fac25d72.png?v=1786100139</image:loc>
      <image:title>Chlorine (Free &amp; Total) Test Kit, Model CN-66, Color Disc, 0.1-3.5 mg/L 100 Tests</image:title>
      <image:caption>Chlorine (Free &amp; Total) Test Kit, Model CN-66, Color Disc, 0.1-3.5 mg/L 100 Tests</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/molybdate-reagent-100-ml-mdb-non-regulated</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-2236-32.png?v=1786100140</image:loc>
      <image:title>Molybdate Reagent, 100 mL MDB (Non Regulated)</image:title>
      <image:caption>Molybdate Reagent, 100 mL MDB (Non Regulated)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/aluminum-reagent-set-aluminon-method-0-008-0-800-mg-l-al-100-tests-hach-2242000</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-22420-00_211a8dc7-ca71-413f-ac45-3ccec087da59.png?v=1787715332</image:loc>
      <image:title>Aluminum Reagent Set, Aluminon Method, 0.008 - 0.800 mg/L Al, 100 Tests, HACH, 2242000</image:title>
      <image:caption>Aluminum Reagent Set, Aluminon Method, 0.008 - 0.800 mg/L Al, 100 Tests, HACH, 2242000</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/silica-reagent-set-25-ml-sample-size-100-ea-2244300</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-2244300.png?v=1786100149</image:loc>
      <image:title>Silica Reagent Set, 25 mL Sample Size, 100/EA, 2244300</image:title>
      <image:caption>Silica Reagent Set, 25 mL Sample Size, 100/EA, 2244300</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/amino-acid-f-reagent-powder-pillows-25-ml-100-pk-hach-2253869</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-22538-69.png?v=1786506577</image:loc>
      <image:title>Amino Acid F Reagent Powder Pillows, 25 mL, 100/PK, HACH, 2253869</image:title>
      <image:caption>Amino Acid F Reagent Powder Pillows, 25 mL, 100/PK, HACH, 2253869</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/citric-acid-f-reagent-solution-100-ml-hach-2254232</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-22542-32_f104ac3c-a01f-42e8-8e5e-9d0e19d09486.png?v=1787715338</image:loc>
      <image:title>Citric Acid F Reagent Solution, 100 mL, HACH 2254232</image:title>
      <image:caption>Citric Acid F Reagent Solution, 100 mL, HACH 2254232</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/hach-citric-acid-f-reagent-solution-500-ml</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-22542-49.png?v=1786100156</image:loc>
      <image:title>HACH Citric Acid F Reagent Solution, 500 mL</image:title>
      <image:caption>HACH Citric Acid F Reagent Solution, 500 mL</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/hach-hydrogen-peroxide-test-kit-model-hyp-1</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-2291700.png?v=1786100157</image:loc>
      <image:title>HACH Hydrogen Peroxide Test Kit, Model HYP-1</image:title>
      <image:caption>HACH Hydrogen Peroxide Test Kit, Model HYP-1</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/diphenylamine-sulfonic-acid-indicator-solution-25-ml-self-contained-dropper-bottle-hach-2296323</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-22963-23_41e6f1c3-65f8-4545-b5f4-dd1ebbfa664d.png?v=1787196933</image:loc>
      <image:title>Diphenylamine Sulfonic Acid Indicator Solution, 25 mL Self-Contained Dropper Bottle, HACH, 2296323</image:title>
      <image:caption>Diphenylamine Sulfonic Acid Indicator Solution, 25 mL Self-Contained Dropper Bottle, HACH, 2296323</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/chlorine-cl7-dpd-compound-free-total-24-g-non-regulated-hach-2297255</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-22972-55_4db487d7-efc7-492c-8573-95d7949c12fa.png?v=1786100161</image:loc>
      <image:title>Chlorine, CL7 DPD Compound, Free &amp; Total , 24 g (Non-Regulated), HACH, 2297255</image:title>
      <image:caption>Chlorine, CL7 DPD Compound, Free &amp; Total , 24 g (Non-Regulated), HACH, 2297255</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/chlorine-free-indicator-solution-for-cl17-and-cl17sc-analyzers-473-ml-8-un2586-p-g-iii</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-23140-11_ab52b63c-292e-4464-9d86-a1b3348ceb57.png?v=1786100163</image:loc>
      <image:title>Chlorine-Free, Indicator Solution, for CL17 and CL17sc Analyzers, 473 mL (8, UN2586, P.G. III)</image:title>
      <image:caption>Chlorine-Free, Indicator Solution, for CL17 and CL17sc Analyzers, 473 mL (8, UN2586, P.G. III)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/chlorine-chlorine-free-buffer-solution-for-cl17-and-cl17sc-analyzers-473-ml-non-regulated-hach-2314111</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-23141-11.png?v=1786100165</image:loc>
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  <url>
    <loc>https://preiser.com/products/hach-chloride-reagent-set-mercuric-thiocyanate-100-tests</loc>
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    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-23198-00_ec5a325a-7a9f-4496-8f39-419ad93f6270.png?v=1786100167</image:loc>
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      <image:caption>HACH Chloride Reagent Set, Mercuric Thiocyanate, 100 Tests</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/bromcresol-green-methyl-red-indicator-solution-100-ml-marked-dropper-bottle-hach-2329232-representative-image</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-23292-32.png?v=1786100169</image:loc>
      <image:title>Bromcresol Green-Methyl Red Indicator Solution, 100 mL Marked Dropper Bottle, HACH, 2329232 [Representative Image]</image:title>
      <image:caption>Bromcresol Green-Methyl Red Indicator Solution, 100 mL Marked Dropper Bottle, HACH, 2329232 [Representative Image]</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/bromcresol-green-methyl-red-indicator-solution-500-ml-hach-2329249-representative-image</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-23292-49.png?v=1786100171</image:loc>
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      <image:caption>Bromcresol Green-Methyl Red Indicator Solution, 500 mL, HACH 2329249 [Representative Image]</image:caption>
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  <url>
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    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
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      <image:caption>Wide Range pH Indicator Solution, 100 mL Dropper Bottle, HACH, 2329332</image:caption>
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  </url>
  <url>
    <loc>https://preiser.com/products/wide-range-ph-indicator-solution-1-l-hach-2329353</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-23293-53.png?v=1786506581</image:loc>
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      <image:caption>Wide Range pH Indicator Solution, 1 L, HACH, 2329353</image:caption>
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  <url>
    <loc>https://preiser.com/products/hach-bromocresol-green-indicator-solution-500-ml</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-23295-49.png?v=1786100176</image:loc>
      <image:title>HACH Bromocresol Green Indicator Solution, 500 mL</image:title>
      <image:caption>HACH Bromocresol Green Indicator Solution, 500 mL</image:caption>
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  </url>
  <url>
    <loc>https://preiser.com/products/citric-acid-surfactant-reagent-for-silica-analysis-sold-by-each-each-2-9-l-bottle-8-un3265-p-g-iii</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-23470-03.png?v=1786100179</image:loc>
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      <image:caption>Citric Acid/Surfactant Reagent, for Silica Analysis (Sold by Each / Each = 2.9 L Bottle) (8, UN3265, P.G. III)</image:caption>
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  <url>
    <loc>https://preiser.com/products/hach-sulfuric-acid-standard-solution-0-035-n-100-ml-marked-dropper-bottle</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-23497-32.png?v=1786100180</image:loc>
      <image:title>HACH Sulfuric Acid Standard Solution, 0.035 N, 100 mL Marked Dropper Bottle</image:title>
      <image:caption>HACH Sulfuric Acid Standard Solution, 0.035 N, 100 mL Marked Dropper Bottle</image:caption>
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  </url>
  <url>
    <loc>https://preiser.com/products/chloride-titrant-silver-nitrate-0-0493n-100-ml-mdb-hach-2349832</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-23498-32.png?v=1786100181</image:loc>
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      <image:caption>Chloride Titrant, Silver Nitrate, 0.0493N, 100 mL MDB, HACH, 2349832</image:caption>
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  </url>
  <url>
    <loc>https://preiser.com/products/hach-edta-standard-solution-0-035-n-100-ml-marked-dropper-bottle</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-23499-32.png?v=1786100183</image:loc>
      <image:title>HACH EDTA Standard Solution, 0.035 N, 100 mL Marked Dropper Bottle</image:title>
      <image:caption>HACH EDTA Standard Solution, 0.035 N, 100 mL Marked Dropper Bottle</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/hach-molybdenum-1-reagent-powder-pillows-20-ml-sample-100-pk</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
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      <image:title>HACH Molybdenum 1 Reagent Powder Pillows, 20 mL Sample, 100/PK</image:title>
      <image:caption>HACH Molybdenum 1 Reagent Powder Pillows, 20 mL Sample, 100/PK</image:caption>
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  </url>
  <url>
    <loc>https://preiser.com/products/molybdenum-2-reagent-solution-500-ml-hach-2352549</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-23525-49.png?v=1786506583</image:loc>
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      <image:caption>Molybdenum 2 Reagent Solution, 500 mL, HACH, 2352549</image:caption>
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  </url>
  <url>
    <loc>https://preiser.com/products/amino-acid-f-reagent-for-silica-analysis-2-7-l-solution-amino-acid-f-powder-reagent-non-regulated</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
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      <image:caption>Amino Acid F Reagent, for Silica Analysis, 2.7 L Solution + Amino Acid F Powder Reagent (Non-Regulated)</image:caption>
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  <url>
    <loc>https://preiser.com/products/chloride-standard-solution-100-mg-l-1-l-poly-bottle-hach-2370853</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-23708-53.png?v=1786506585</image:loc>
      <image:title>Chloride Standard Solution, 100 mg/L, 1 L Poly Bottle, HACH, 2370853</image:title>
      <image:caption>Chloride Standard Solution, 100 mg/L, 1 L Poly Bottle, HACH, 2370853</image:caption>
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  </url>
  <url>
    <loc>https://preiser.com/products/anionic-surfactant-solution-sold-by-each-each-2-9-l-bottle-non-regulated</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-23755-03.png?v=1787783630</image:loc>
      <image:title>Anionic Surfactant Solution (Sold by Each / Each = 2.9 L Bottle) (Non-Regulated)</image:title>
      <image:caption>Anionic Surfactant Solution (Sold by Each / Each = 2.9 L Bottle) (Non-Regulated)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/polyvinyl-alcohol-dispersing-agent-in-50-ml-self-contained-dropper-bottle-2376526</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
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      <image:caption>Polyvinyl Alcohol Dispersing Agent in 50 mL Self-Contained Dropper Bottle, 2376526</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/hach-mineral-stabilizer-solution-50-ml-in-self-contained-dropping-bottle</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
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      <image:title>HACH Mineral Stabilizer Solution, 50 mL in Self-Contained Dropping Bottle</image:title>
      <image:caption>HACH Mineral Stabilizer Solution, 50 mL in Self-Contained Dropping Bottle</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/hach-zinc-standard-solution-100-mg-l-as-zn-nist-100-ml</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-2378-42_0255a6bf-2645-4a3a-b3d0-e7fb2937ab80.png?v=1786100198</image:loc>
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      <image:caption>HACH Zinc Standard Solution, 100 mg/L as Zn (NIST), 100 mL</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/hach-amino-acid-f-reagent-solution-100-ml</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-23864-42.png?v=1787715340</image:loc>
      <image:title>HACH Amino Acid F Reagent Solution, 100 mL</image:title>
      <image:caption>HACH Amino Acid F Reagent Solution, 100 mL</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/glass-sample-cell-25-mm-round-10-20-25-ml-marks-6-pk-2401906</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-24019-06_3afcb25a-242f-4763-a1be-044114e714ba.png?v=1786100201</image:loc>
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      <image:caption>Glass Sample Cell, 25 mm Round, 10-20-25 mL Marks, 6/PK, 2401906</image:caption>
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  </url>
  <url>
    <loc>https://preiser.com/products/hach-ammonia-standard-solution-100-mg-l-2-mg-l-as-nh3n-500-ml</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-24065-49.png?v=1786100203</image:loc>
      <image:title>HACH Ammonia Standard Solution,100 mg/L +/- 2 mg/L as NH3N, 500 mL</image:title>
      <image:caption>HACH Ammonia Standard Solution,100 mg/L +/- 2 mg/L as NH3N, 500 mL</image:caption>
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  </url>
  <url>
    <loc>https://preiser.com/products/sample-cell-1-in-round-glass-with-caps-10-ml-6-pk-hach-2427606</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-24276-06.png?v=1786506588</image:loc>
      <image:title>Sample Cell: 1 in. Round Glass with Caps, 10 mL, 6/PK, HACH, 2427606</image:title>
      <image:caption>Sample Cell: 1 in. Round Glass with Caps, 10 mL, 6/PK, HACH, 2427606</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/bart-test-for-iron-related-bacteria-9-pk-hach-2432309</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-24323-09.png?v=1786506590</image:loc>
      <image:title>BART Test for Iron-Related Bacteria, 9/PK, HACH, 2432309</image:title>
      <image:caption>BART Test for Iron-Related Bacteria, 9/PK, HACH, 2432309</image:caption>
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  </url>
  <url>
    <loc>https://preiser.com/products/bart-tester-sulfate-reducing-bacteria-sold-by-each-each-9-vials</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-24324-09.png?v=1786100207</image:loc>
      <image:title>BART Tester, Sulfate-Reducing Bacteria (Sold by Each / Each = 9 Vials)</image:title>
      <image:caption>BART Tester, Sulfate-Reducing Bacteria (Sold by Each / Each = 9 Vials)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/sulfuric-acid-solution-5-25-n-2-9-l-bottle-8-un3264-p-g-iii</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-2449-03_e5a6fc25-ee53-43ec-8ffc-9b63e3fb5e2a.png?v=1787783632</image:loc>
      <image:title>Sulfuric Acid Solution, 5.25 N, 2.9 L Bottle (8, UN3264, P.G. III)</image:title>
      <image:caption>Sulfuric Acid Solution, 5.25 N, 2.9 L Bottle (8, UN3264, P.G. III)</image:caption>
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  </url>
  <url>
    <loc>https://preiser.com/products/sodium-hydroxide-standard-solution-5-0-n-sold-by-each-each-100-ml-bottle-8-un1824-p-g-ii</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-2450-32_8d3194f2-7c45-40d0-8e22-eff66ea6ba43.png?v=1786100213</image:loc>
      <image:title>Sodium Hydroxide Standard Solution, 5.0 N (Sold by Each / Each = 100 mL Bottle) (8, UN1824, P.G. II)</image:title>
      <image:caption>Sodium Hydroxide Standard Solution, 5.0 N (Sold by Each / Each = 100 mL Bottle) (8, UN1824, P.G. II)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/silica-low-range-reagent-set-10ml-100-ea-2459300</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
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      <image:caption>Silica, Low Range, Reagent Set, 10mL, 100/EA, 2459300</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/cyanuric-acid-2-reagent-powder-pillows-50-pk-hach-246066</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
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      <image:title>Cyanuric Acid 2 Reagent Powder Pillows, 50/PK, HACH,  246066</image:title>
      <image:caption>Cyanuric Acid 2 Reagent Powder Pillows, 50/PK, HACH,  246066</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/formazin-turbidity-standard-4000-ntu-100-ml-poly-bottle-hach-246142</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
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      <image:title>Formazin Turbidity Standard, 4000 NTU, 100 mL Poly Bottle, HACH, 246142</image:title>
      <image:caption>Formazin Turbidity Standard, 4000 NTU, 100 mL Poly Bottle, HACH, 246142</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/ampule-breakers-media-ampules-for-2-ml-pourrite-ampules</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-24846-00.png?v=1786100221</image:loc>
      <image:title>Ampule Breakers, Media Ampules for 2-mL PourRite Ampules</image:title>
      <image:caption>Ampule Breakers, Media Ampules for 2-mL PourRite Ampules</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/buffer-solution-ulr-chlorine-20-pk-hach-2493120</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-24931-20_d461d94b-f826-4b37-b74c-7c13e6f4a08e.png?v=1786100223</image:loc>
      <image:title>Buffer Solution, ULR Chlorine, 20/PK, HACH, 2493120</image:title>
      <image:caption>Buffer Solution, ULR Chlorine, 20/PK, HACH, 2493120</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/dpd-chlorine-indicator-solution-ampules-ulr-1-5-ml-ampule-20-pk-hach-2493220</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-24932-20.png?v=1786100225</image:loc>
      <image:title>DPD Chlorine Indicator Solution Ampules, ULR, 1.5 mL/Ampule, 20/PK, HACH, 2493220</image:title>
      <image:caption>DPD Chlorine Indicator Solution Ampules, ULR, 1.5 mL/Ampule, 20/PK, HACH, 2493220</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/sample-cell-1-in-square-glass-10-ml-matched-pair-hach-2495402</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
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    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-24954-02.png?v=1786100227</image:loc>
      <image:title>Sample Cell, 1 in. Square Glass, 10 mL Matched Pair, HACH, 2495402</image:title>
      <image:caption>Sample Cell, 1 in. Square Glass, 10 mL Matched Pair, HACH, 2495402</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/dpd-free-chlorine-reagent-accuvac-ampules-range-up-to-2-00-mg-l-non-regulated</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-25020-25_e34f00e2-3359-4848-a07a-370a34d6ae0d.png?v=1786100228</image:loc>
      <image:title>DPD Free Chlorine Reagent, AccuVac Ampules, Range: up to 2.00 mg/L (Non-Regulated)</image:title>
      <image:caption>DPD Free Chlorine Reagent, AccuVac Ampules, Range: up to 2.00 mg/L (Non-Regulated)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/dpd-total-chlorine-reagent-accuvac-ampules-range-0-02-to-2-00-mg-l-non-regulated</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-25030-25_b8a3bce1-3b67-4ecf-be10-1f409714a1e8.png?v=1786100229</image:loc>
      <image:title>DPD Total Chlorine Reagent, AccuVac Ampules, Range: 0.02 to 2.00 mg/L (Non-Regulated)</image:title>
      <image:caption>DPD Total Chlorine Reagent, AccuVac Ampules, Range: 0.02 to 2.00 mg/L (Non-Regulated)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/spadns-2-fluoride-reagent-accuvac-ampules-arsenic-free-25-pk-hach-2527025</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-2527025.png?v=1786506594</image:loc>
      <image:title>SPADNS 2 Fluoride Reagent AccuVac Ampules, Arsenic-Free, 25/PK, HACH, 2527025</image:title>
      <image:caption>SPADNS 2 Fluoride Reagent AccuVac Ampules, Arsenic-Free, 25/PK, HACH, 2527025</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/nitrification-inhibitor-for-bod-formula-2533t-tcmp-35-g-bottle</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-2533-35_7fd21c50-857d-4472-8ce4-38cdfa054111.png?v=1787110498</image:loc>
      <image:title>Nitrification Inhibitor for BOD, Formula 2533T, TCMP, 35 g Bottle</image:title>
      <image:caption>Nitrification Inhibitor for BOD, Formula 2533T, TCMP, 35 g Bottle</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/free-chlorine-reagent-set-includes-dpd-compound-indicator-and-buffer-for-rapid-liquid-method-cl17-process-analyzer-and-bulk-analytical-methods</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-25569-00.png?v=1786100236</image:loc>
      <image:title>Free Chlorine Reagent Set, Includes DPD compound, Indicator and Buffer, For Rapid Liquid Method, CL17 Process Analyzer, and Bulk Analytical Methods</image:title>
      <image:caption>Free Chlorine Reagent Set, Includes DPD compound, Indicator and Buffer, For Rapid Liquid Method, CL17 Process Analyzer, and Bulk Analytical Methods</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/hach-total-chlorine-reagent-set-for-chlorine-analyzer-cl17-cl17sc</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-25570-00.png?v=1786100239</image:loc>
      <image:title>HACH Total Chlorine Reagent Set for Chlorine Analyzer CL17/CL17sc</image:title>
      <image:caption>HACH Total Chlorine Reagent Set for Chlorine Analyzer CL17/CL17sc</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/iron-and-ph-color-disc-test-kit-model-ir-23-hach-256200</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-2562-00.png?v=1786506596</image:loc>
      <image:title>Iron and pH Color Disc Test Kit, Model IR-23, HACH, 256200</image:title>
      <image:caption>Iron and pH Color Disc Test Kit, Model IR-23, HACH, 256200</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/silica-reagent-set-ultra-low-range-3-to-1000-micrograms-l-sio2-40-tests-hach-2581400</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-2581400.png?v=1786506601</image:loc>
      <image:title>Silica Reagent Set, Ultra Low Range, 3 to 1000 micrograms/L SiO2, 40 tests, HACH, 2581400</image:title>
      <image:caption>Silica Reagent Set, Ultra Low Range, 3 to 1000 micrograms/L SiO2, 40 tests, HACH, 2581400</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/fluoride-ionic-strength-adjustor-isa-powder-pillows-100-pk-hach-258999</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-258999_41d91d5c-bb64-4553-a69c-1cce69dd6cf0.png?v=1786100249</image:loc>
      <image:title>Fluoride Ionic Strength Adjustor (ISA) Powder Pillows, 100/PK, HACH, 258999</image:title>
      <image:caption>Fluoride Ionic Strength Adjustor (ISA) Powder Pillows, 100/PK, HACH, 258999</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/hach-copper-masking-reagent-powder-pillows-10-ml-sample-100-pk</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-2603449.png?v=1786100251</image:loc>
      <image:title>HACH Copper Masking Reagent Powder Pillows, 10 mL Sample, 100/PK</image:title>
      <image:caption>HACH Copper Masking Reagent Powder Pillows, 10 mL Sample, 100/PK</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/porphyrin-1-reagent-powder-pillows-10-ml-sample-100-pk</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-26035-49.png?v=1786100253</image:loc>
      <image:title>Porphyrin 1 Reagent Powder Pillows, 10 mL Sample, 100/PK</image:title>
      <image:caption>Porphyrin 1 Reagent Powder Pillows, 10 mL Sample, 100/PK</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/porphyrin-2-reagent-powder-pillows-10-ml-sample-100-pk</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-26036-49.png?v=1786100255</image:loc>
      <image:title>Porphyrin 2 Reagent Powder Pillows, 10 mL Sample, 100/PK</image:title>
      <image:caption>Porphyrin 2 Reagent Powder Pillows, 10 mL Sample, 100/PK</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/nitrogen-ammonia-reagent-set-tnt-amver-salicylate-low-range-0-02-2-50-mg-l-as-nh3-n-535600</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-26045-45_9697796f-2e60-4ba2-99d8-e95d07ce6e3c.png?v=1786100258</image:loc>
      <image:title>Nitrogen-Ammonia Reagent Set, TNT, AmVer (Salicylate), Low Range, 0.02 - 2.50 mg/L as NH3-N, 535600</image:title>
      <image:caption>Nitrogen-Ammonia Reagent Set, TNT, AmVer (Salicylate), Low Range, 0.02 - 2.50 mg/L as NH3-N, 535600</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/hach-nitraver-x-nitrogen-nitrate-reagent-set-hr-50-tests</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-26053-45_a3711a4f-16bf-4a8b-9e51-9ef3ed8b5162.png?v=1786100260</image:loc>
      <image:title>HACH NitraVer X Nitrogen-Nitrate Reagent Set, HR, 50 Tests</image:title>
      <image:caption>HACH NitraVer X Nitrogen-Nitrate Reagent Set, HR, 50 Tests</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/hach-ammonia-nitrogen-reagent-set-tnt-amver-salicylate-high-range</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-26069-45.png?v=1786100263</image:loc>
      <image:title>HACH Ammonia Nitrogen Reagent Set, TNT, AmVer (Salicylate), High Range</image:title>
      <image:caption>HACH Ammonia Nitrogen Reagent Set, TNT, AmVer (Salicylate), High Range</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/tptz-iron-reagent-powder-pillows-10-ml-sample-size-100-pk-hach-2608799</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-26087-99.png?v=1786506602</image:loc>
      <image:title>TPTZ Iron Reagent Powder Pillows, 10 mL Sample Size, 100/PK, HACH, 2608799</image:title>
      <image:caption>TPTZ Iron Reagent Powder Pillows, 10 mL Sample Size, 100/PK, HACH, 2608799</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/bart-tester-denitrifying-bacteria-kit</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-26193-09_1db6446c-72b4-4f9a-b16f-c70bf9819712.png?v=1786100267</image:loc>
      <image:title>Bart Tester, Denitrifying Bacteria Kit</image:title>
      <image:caption>Bart Tester, Denitrifying Bacteria Kit</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/bart-tester-nitrifying-bacteria-kit</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-26194-07.png?v=1786100268</image:loc>
      <image:title>Bart Tester, Nitrifying Bacteria Kit</image:title>
      <image:caption>Bart Tester, Nitrifying Bacteria Kit</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/speccheck-secondary-gel-standards-set-dpd-chlorine</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-26353-00.png?v=1787715346</image:loc>
      <image:title>SpecCheck Secondary Gel Standards Set, DPD Chlorine</image:title>
      <image:caption>SpecCheck Secondary Gel Standards Set, DPD Chlorine</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/phenol-red-indicator-solution-spec-grade-50-ml-hach-2657512</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-2657512.png?v=1786506605</image:loc>
      <image:title>Phenol Red Indicator Solution, Spec. Grade, 50 mL, HACH, 2657512</image:title>
      <image:caption>Phenol Red Indicator Solution, Spec. Grade, 50 mL, HACH, 2657512</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/hach-stablcal-turbidity-standard-20-0-ntu-1-l-bottle</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-26601-53.png?v=1786100276</image:loc>
      <image:title>HACH Stablcal Turbidity Standard, 20.0 NTU,  1 L Bottle</image:title>
      <image:caption>HACH Stablcal Turbidity Standard, 20.0 NTU,  1 L Bottle</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/iron-ferrous-color-disc-test-kit-model-ir-18c-0-to-7-mg-l-fe2-100-tests</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-2667200.png?v=1786100278</image:loc>
      <image:title>Iron (Ferrous) Color Disc Test Kit, Model IR-18C, 0 to 7 mg/L Fe2+, 100 tests</image:title>
      <image:caption>Iron (Ferrous) Color Disc Test Kit, Model IR-18C, 0 to 7 mg/L Fe2+, 100 tests</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/stablcal-turbidity-standard-0-50-ntu-100-ml-hach-2698042</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-26980-42.png?v=1786100280</image:loc>
      <image:title>Stablcal Turbidity Standard, 0.50 NTU, 100 mL, HACH, 2698042</image:title>
      <image:caption>Stablcal Turbidity Standard, 0.50 NTU, 100 mL, HACH, 2698042</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/hach-phosphorus-reactive-tnt-reagent-set-low-range</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-27425-45.png?v=1787783634</image:loc>
      <image:title>HACH Phosphorus Reactive TNT Reagent Set, Low Range</image:title>
      <image:caption>HACH Phosphorus Reactive TNT Reagent Set, Low Range</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/phosphorus-total-test-n-tube-reagent-set-includes-phosver-3-phosphate-reagent-powder-pillows-potassium-persulfate-powder-pillows-sodium-hydroxide-solution-total-and-acid-hydrolyzable-test-vials-water-deionized</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-27426-45.png?v=1786100284</image:loc>
      <image:title>Phosphorus, Total, Test &apos;N Tube Reagent Set, Includes PhosVer 3 Phosphate Reagent Powder Pillows, Potassium Persulfate Powder Pillows, Sodium Hydroxide Solution, Total and Acid Hydrolyzable Test Vials, Water-Deionized</image:title>
      <image:caption>Phosphorus, Total, Test &apos;N Tube Reagent Set, Includes PhosVer 3 Phosphate Reagent Powder Pillows, Potassium Persulfate Powder Pillows, Sodium Hydroxide Solution, Total and Acid Hydrolyzable Test Vials, Water-Deionized</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/total-alkalinity-test-strips-0-240-mg-l-50-pk-hach-2744850</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-27448-50.png?v=1786506607</image:loc>
      <image:title>Total Alkalinity Test Strips, 0-240 mg/L, 50/PK, HACH, 2744850</image:title>
      <image:caption>Total Alkalinity Test Strips, 0-240 mg/L, 50/PK, HACH, 2744850</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/chloride-quantab-test-strips-30-600-mg-l-40-tests</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-27449-40.png?v=1787283425</image:loc>
      <image:title>Chloride QuanTab Test Strips, 30-600 mg/L, 40 Tests</image:title>
      <image:caption>Chloride QuanTab Test Strips, 30-600 mg/L, 40 Tests</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/chloride-quantab-test-strips-300-6000-mg-l-hach-2751340</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-27513-40.png?v=1787283427</image:loc>
      <image:title>Chloride QuanTab Test Strips, 300-6000 mg/L, HACH, 2751340</image:title>
      <image:caption>Chloride QuanTab Test Strips, 300-6000 mg/L, HACH, 2751340</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/ammonia-nitrogen-test-strips-0-to-6-0-mg-l-25-pk-hach-2755325</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-2755325.png?v=1786100292</image:loc>
      <image:title>Ammonia (Nitrogen) Test Strips, 0 to 6.0 mg/L, 25/PK, HACH, 2755325</image:title>
      <image:caption>Ammonia (Nitrogen) Test Strips, 0 to 6.0 mg/L, 25/PK, HACH, 2755325</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/ph-electrode-storage-solution-500-ml-poly-bottle-hach-2756549</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-27565-49.png?v=1786506612</image:loc>
      <image:title>pH Electrode Storage Solution, 500 mL Poly Bottle, HACH, 2756549</image:title>
      <image:caption>pH Electrode Storage Solution, 500 mL Poly Bottle, HACH, 2756549</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/hach-hardness-buffer-solution-for-hach-sp510-0-51-0-3-1-2-5-mg-l-1</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-2768549.png?v=1786100296</image:loc>
      <image:title>HACH Hardness Buffer Solution for HACH SP510, 0.51, 0.3, 1, 2, 5 mg/L</image:title>
      <image:caption>HACH Hardness Buffer Solution for HACH SP510, 0.51, 0.3, 1, 2, 5 mg/L</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/hach-hardness-indicator-solution-for-sp510-hardness-monitor-500-ml-2-mg-l</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-2769149.png?v=1786100298</image:loc>
      <image:title>HACH Hardness Indicator Solution for SP510 Hardness Monitor, 500 mL, 2 mg/L</image:title>
      <image:caption>HACH Hardness Indicator Solution for SP510 Hardness Monitor, 500 mL, 2 mg/L</image:caption>
    </image:image>
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  <url>
    <loc>https://preiser.com/products/manver-2-hardness-indicator-powder-113-grams-apha-hardness-method</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
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      <image:caption>ManVer 2 Hardness Indicator Powder, 113 grams. APHA, Hardness Method</image:caption>
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  </url>
  <url>
    <loc>https://preiser.com/products/dpd-total-chlorine-reagent-swiftest-dispenser-hach-2802400</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-2802400_52443721-f109-4437-9508-0b28fdf2c608.png?v=1786506614</image:loc>
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      <image:caption>DPD Total Chlorine Reagent, Swiftest Dispenser, HACH, 2802400</image:caption>
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  </url>
  <url>
    <loc>https://preiser.com/products/calver-2-calcium-indicator-113-g-amber-glass-bottle-hach-28114h</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-28114H.png?v=1787783636</image:loc>
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      <image:caption>CalVer 2 Calcium Indicator, 113 g  Amber Glass Bottle, HACH, 28114H</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/hach-potassium-hydroxide-standard-solution-8-00-n-100-ml-marked-dropper-bottle</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-28232-01_da329a65-1455-48d1-991e-8c6a1d050a54.png?v=1786100305</image:loc>
      <image:title>HACH Potassium Hydroxide Standard Solution, 8.00 N, 100 mL Marked Dropper Bottle</image:title>
      <image:caption>HACH Potassium Hydroxide Standard Solution, 8.00 N, 100 mL Marked Dropper Bottle</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/hach-potassium-hydroxide-standard-solution-8-00-n-500-ml</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-28249.png?v=1786100307</image:loc>
      <image:title>HACH Potassium Hydroxide Standard Solution, 8.00 N, 500 mL</image:title>
      <image:caption>HACH Potassium Hydroxide Standard Solution, 8.00 N, 500 mL</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/reducing-adapter-16-mm-to-13-mm-vials-5-pieces-hach-2895805</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-28958-05.png?v=1786506618</image:loc>
      <image:title>Reducing Adapter, 16 mm to 13 mm Vials, 5 Pieces, HACH, 2895805</image:title>
      <image:caption>Reducing Adapter, 16 mm to 13 mm Vials, 5 Pieces, HACH, 2895805</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/bottle-dropping-assembly-59-ml-6-pk-hach-2937606</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-2937606_a4cdc56d-d135-466f-868d-c3dda0ce0c90.png?v=1786100311</image:loc>
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      <image:caption>Bottle, Dropping, Assembly, 59 mL, 6/PK, HACH, 2937606</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/spadns-2-arsenic-free-fluoride-reagent-solution-500-ml-2947549</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-29475-49.png?v=1786100313</image:loc>
      <image:title>SPADNS 2 (Arsenic-free) Fluoride Reagent Solution, 500 mL, 2947549</image:title>
      <image:caption>SPADNS 2 (Arsenic-free) Fluoride Reagent Solution, 500 mL, 2947549</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/hach-spadns-2-fluoride-reagent-solution-arsenic-free-1-l</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-2947553_ff05d5c8-3aff-45ac-8bf7-e7801bfef1bb.png?v=1786100315</image:loc>
      <image:title>HACH SPADNS 2 Fluoride Reagent Solution, (Arsenic-Free), 1 L</image:title>
      <image:caption>HACH SPADNS 2 Fluoride Reagent Solution, (Arsenic-Free), 1 L</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/electrode-cleaning-solution-for-fats-oils-and-grease-samples-500-ml-hach-2964449</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-29644-49.png?v=1786506619</image:loc>
      <image:title>Electrode Cleaning Solution for Fats, Oils and Grease Samples, 500 mL, HACH, 2964449</image:title>
      <image:caption>Electrode Cleaning Solution for Fats, Oils and Grease Samples, 500 mL, HACH, 2964449</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/filling-solution-reference-2-44-m-kcl-59-ml-hach-2965026</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-2965026_73357f8c-6aa5-4b0d-9cb9-7b5bc828c105.png?v=1786506621</image:loc>
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      <image:caption>Filling Solution, Reference, 2.44 M KCl, 59 mL, HACH, 2965026</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/stablcal-turbidity-standards-calibration-kit-2100q-qis-portable-turbidimeter-sealed-vials-hach-2971205</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-29712-05.png?v=1786506623</image:loc>
      <image:title>Stablcal Turbidity Standards Calibration Kit, 2100Q/QIS Portable Turbidimeter, Sealed Vials, HACH, 2971205</image:title>
      <image:caption>Stablcal Turbidity Standards Calibration Kit, 2100Q/QIS Portable Turbidimeter, Sealed Vials, HACH, 2971205</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/speccheck-secondary-gel-standards-set-dpd-chlorine-mr-hach-2980500</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-2980500.png?v=1786506625</image:loc>
      <image:title>SpecCheck Secondary Gel Standards Set, DPD Chlorine - MR, HACH, 2980500</image:title>
      <image:caption>SpecCheck Secondary Gel Standards Set, DPD Chlorine - MR, HACH, 2980500</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/sodium-thiosulfate-standard-solution-0-1-n-100-ml-poly-marked-dropper-bottle-hach-32332</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-32332.png?v=1786506628</image:loc>
      <image:title>Sodium Thiosulfate Standard Solution, 0.1 N, 100 mL Poly Marked Dropper Bottle, HACH, 32332</image:title>
      <image:caption>Sodium Thiosulfate Standard Solution, 0.1 N, 100 mL Poly Marked Dropper Bottle, HACH, 32332</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/hach-hardness-1-buffer-solution-100-ml-marked-dropping-bottle</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-424-32.png?v=1787196945</image:loc>
      <image:title>HACH Hardness 1 Buffer Solution, 100 mL Marked Dropping Bottle</image:title>
      <image:caption>HACH Hardness 1 Buffer Solution, 100 mL Marked Dropping Bottle</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/hardness-1-buffer-solution-sold-by-each-each-500-ml-bottle-non-regulated</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
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      <image:title>Hardness 1 Buffer Solution (Sold by Each / Each = 500 mL Bottle) (Non-Regulated)</image:title>
      <image:caption>Hardness 1 Buffer Solution (Sold by Each / Each = 500 mL Bottle) (Non-Regulated)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/hardness-1-buffer-solution-1-l-hach-42453</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-424-53.png?v=1786100330</image:loc>
      <image:title>Hardness 1 Buffer Solution, 1 L, HACH, 42453</image:title>
      <image:caption>Hardness 1 Buffer Solution, 1 L, HACH, 42453</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/manver-hardness-2-indicator-solution-100-ml-marked-dropper-bottle-hach-42532</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-425-32.png?v=1787196947</image:loc>
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      <image:caption>ManVer Hardness 2 Indicator Solution, 100 mL Marked Dropper Bottle, HACH 42532</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/manver-hardness-2-indicator-solution-500-ml-bottle-hach-42549-representative-image</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
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      <image:caption>ManVer Hardness 2 Indicator Solution, 500 mL Bottle, HACH 42549 [Representative Image]</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/hardness-3-solution-100-ml-marked-dropper-bottle-hach-42632</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
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      <image:caption>Hardness 3 Solution, 100 mL Marked Dropper Bottle, HACH, 42632</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/spadns-fluoride-reagent-solution-500-ml-hach-44449-representative-image</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
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      <image:caption>SPADNS Fluoride Reagent Solution, 500 mL, HACH, 44449 [Representative Image]</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/spadns-fluoride-reagent-solution-1-l-hach-44453</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-444-53.png?v=1786506632</image:loc>
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      <image:caption>SPADNS Fluoride Reagent Solution, 1 L, HACH, 44453</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/spadns-fluoride-reagent-solution-3-78-l-hach-44417</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
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      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-44417_a317dbd5-aaf5-49f3-a260-ac6574091d57.png?v=1786100341</image:loc>
      <image:title>SPADNS Fluoride Reagent Solution, 3.78 L, HACH, 44417</image:title>
      <image:caption>SPADNS Fluoride Reagent Solution, 3.78 L, HACH, 44417</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/ammonia-ionic-strength-adjustor-isa-powder-pillows-100-pk-hach-4447169</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-44471-69_347f35e2-c74e-4fe7-91b9-1fc02c1a42e4.png?v=1786506634</image:loc>
      <image:title>Ammonia Ionic Strength Adjustor (ISA) Powder Pillows, 100/PK, HACH,  4447169</image:title>
      <image:caption>Ammonia Ionic Strength Adjustor (ISA) Powder Pillows, 100/PK, HACH,  4447169</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/hach-series-5000-silica-analyzer-reagent-set-with-silica-standard-contains-molybdate-3-reagent</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-45627-00.png?v=1786100347</image:loc>
      <image:title>HACH Series 5000 Silica Analyzer Reagent Set with Silica Standard (Contains Molybdate 3 Reagent)</image:title>
      <image:caption>HACH Series 5000 Silica Analyzer Reagent Set with Silica Standard (Contains Molybdate 3 Reagent)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/sample-cell-1-cm-rectangular-quartz-10-mm-pathlength-matched-pair-hach-4822800</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-4822800.png?v=1786506635</image:loc>
      <image:title>Sample Cell, 1 cm Rectangular Quartz, 10 mm Pathlength, Matched Pair, HACH, 4822800</image:title>
      <image:caption>Sample Cell, 1 cm Rectangular Quartz, 10 mm Pathlength, Matched Pair, HACH, 4822800</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/spoon-measuring-0-05-gram-capacity</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-49200.png?v=1786100351</image:loc>
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      <image:caption>Spoon, Measuring, 0.05 Gram Capacity</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/spoon-measuring-1-0-gram-capacity</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-51000_70333cbf-91b4-4579-a946-1f9ee41c9dbb.png?v=1786100352</image:loc>
      <image:title>Spoon, Measuring, 1.0 Gram Capacity</image:title>
      <image:caption>Spoon, Measuring, 1.0 Gram Capacity</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/cl17-chlorine-analyzer-maintenance-kit-self-assembly-hach-5444300</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-5444300.png?v=1786100353</image:loc>
      <image:title>Cl17 Chlorine Analyzer Maintenance Kit (Self Assembly), HACH, 5444300</image:title>
      <image:caption>Cl17 Chlorine Analyzer Maintenance Kit (Self Assembly), HACH, 5444300</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/maintenance-kit-for-sp-510-hardness-monitor</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-5516500_7ea56fd0-f3f2-462f-9268-94a7e402b591.png?v=1786100355</image:loc>
      <image:title>Maintenance Kit for SP-510 Hardness Monitor</image:title>
      <image:caption>Maintenance Kit for SP-510 Hardness Monitor</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/intellical-isenh3181-ammonia-ion-selective-electrode-ise-replacement-membranes-pack-of-3</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-5812711.png?v=1786100356</image:loc>
      <image:title>IntelliCAL ISENH3181 Ammonia Ion Selective Electrode (ISE) Replacement Membranes, pack of 3</image:title>
      <image:caption>IntelliCAL ISENH3181 Ammonia Ion Selective Electrode (ISE) Replacement Membranes, pack of 3</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/protective-shroud-kit-for-standard-intellical-ldo-probes-hach-5832500</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-5832500_b8936a81-7e0b-4e33-8b43-2506d608df5f.png?v=1786506636</image:loc>
      <image:title>Protective Shroud Kit for Standard IntelliCAL LDO Probes, HACH, 5832500</image:title>
      <image:caption>Protective Shroud Kit for Standard IntelliCAL LDO Probes, HACH, 5832500</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/sodium-persulfate-solution-0-6-molar-sold-by-each-each-5-gal-non-regulated</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-58453-00.png?v=1786100359</image:loc>
      <image:title>Sodium Persulfate Solution 0.6 Molar (Sold by Each / Each = 5 Gal.) (Non-Regulated)</image:title>
      <image:caption>Sodium Persulfate Solution 0.6 Molar (Sold by Each / Each = 5 Gal.) (Non-Regulated)</image:caption>
    </image:image>
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  <url>
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  <url>
    <loc>https://preiser.com/products/ph-sensor-union-mount-lcp-liquid-crystal-polymer-5-wire-with-internal-preamplifier-10-ft-3-m-cable-hach-6058po</loc>
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      <image:caption>pH Sensor, Union Mount, LCP (Liquid Crystal Polymer), 5-wire with Internal Preamplifier, 10 ft (3 m) Cable, HACH, 6058PO</image:caption>
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  <url>
    <loc>https://preiser.com/products/dpd-oxalate-analytical-grade-25-g-hach-608424</loc>
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    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-608424.png?v=1786506640</image:loc>
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      <image:caption>DPD Oxalate, Analytical Grade, 25 g, HACH, 608424</image:caption>
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  <url>
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    <loc>https://preiser.com/products/maintenance-kit-for-hach-5500sc-silica-2-4-channel-analyzers</loc>
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      <image:caption>Maintenance Kit for HACH 5500sc Silica 2/4 Channel Analyzers</image:caption>
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      <image:caption>Sulfite 3 Reagent, 100 mL MDB, HACH, 70532</image:caption>
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      <image:caption>NEW Low Range Total Alkalinity Chemkey® Reagents, 25/Box, 8636200</image:caption>
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      <image:caption>NEW Low Range Hardness Chemkey® Reagents, 25/Box, 8636400</image:caption>
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      <image:caption>NEW Low Range Orthophosphate Chemkey® Reagents, 25/Box, 8636600</image:caption>
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  <url>
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  <url>
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  <url>
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  </url>
  <url>
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      <image:caption>Calcium Indicator, CalVer 2, Powder Pillows (Package of 100 Pillows)</image:caption>
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  <url>
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  <url>
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    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
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  <url>
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  <url>
    <loc>https://preiser.com/products/dr1900-portable-spectrophotometer-hach-dr1900-01h</loc>
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      <image:caption>DR1900 Portable Spectrophotometer, HACH, DR1900-01H</image:caption>
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  </url>
  <url>
    <loc>https://preiser.com/products/intellical-lbod101-luminescent-optical-dissolved-oxygen-ldo-sensor-for-bod-measurements-1-m-cable</loc>
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    <changefreq>daily</changefreq>
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  <url>
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  <url>
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      <image:caption>Pour-Thru Cell Kit for DR3900 and DR1900, HACH, LZV899</image:caption>
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  <url>
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      <image:caption>Electrolyte Solution (3 M KCL), 50 mL Bottle</image:caption>
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      <image:caption>Stablcal Primary Standards Set with RFID (10 NTU, 20 NTU, 600 NTU), for TU5200, TU5300sc, and TU5400sc Laser Turbidimeters, HACH, LZY835</image:caption>
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    <image:image>
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      <image:caption>Manual Vial Wiper for TU5200, TU5300sc, and TU5400sc Laser Turbidimeters, HACH, LZY903</image:caption>
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      <image:caption>2 in. PVC Union Mounting Tee, For 1.5 inch pH/ORP Sensors, HACH MH578N9A</image:caption>
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      <image:caption>2&quot; PVC Union Mounting Tee Only, for 1.5 inch pH/ORP Sensors, No Junction Box, HACH, MH578N9AZ</image:caption>
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    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-PHC10103.png?v=1786506658</image:loc>
      <image:title>IntelliCAL PHC101 Laboratory Low Maintenance Gel Filled pH Electrode, 3 m Cable, HACH, PHC10103</image:title>
      <image:caption>IntelliCAL PHC101 Laboratory Low Maintenance Gel Filled pH Electrode, 3 m Cable, HACH, PHC10103</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/chemical-oxygen-demand-cod-tntplus-vial-test-hr-20-1-500-mg-l-cod-25-tests-hach-tnt822</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-TNT822_db04080d-8d36-4785-bb86-6200bd4f5afb.png?v=1786506661</image:loc>
      <image:title>Chemical Oxygen Demand (COD) TNTplus Vial Test, HR (20-1,500 mg/L COD), 25 Tests, HACH, TNT822</image:title>
      <image:caption>Chemical Oxygen Demand (COD) TNTplus Vial Test, HR (20-1,500 mg/L COD), 25 Tests, HACH, TNT822</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/phosphorus-reactive-and-total-tntplus-vial-test-uhr-6-60-mg-l-po4-25-tests-hach-tnt845</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-TNT845.png?v=1786100451</image:loc>
      <image:title>Phosphorus (Reactive and Total) TNTplus Vial Test, UHR (6-60 mg/L PO4), 25 Tests, HACH TNT845</image:title>
      <image:caption>Phosphorus (Reactive and Total) TNTplus Vial Test, UHR (6-60 mg/L PO4), 25 Tests, HACH TNT845</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/copper-tntplus-vial-test-0-1-to-8-0-mg-l-cu-25-tests-hach-tnt860</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-TNT860.png?v=1786100451</image:loc>
      <image:title>Copper TNTplus Vial Test (0.1 to  8.0 mg/L Cu), 25 Tests, HACH, TNT860</image:title>
      <image:caption>Copper TNTplus Vial Test (0.1 to  8.0 mg/L Cu), 25 Tests, HACH, TNT860</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/free-and-total-chlorine-tntplus-vial-test-0-05-to-2-00-mg-l-cl2-24-tests-hach-tnt867</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-TNT867_091c976e-88ce-4114-b14c-fd3ad11f5501.png?v=1786100452</image:loc>
      <image:title>Free and Total Chlorine TNTplus Vial Test (0.05 to 2.00 mg/L Cl2), 24 Tests, HACH, TNT867</image:title>
      <image:caption>Free and Total Chlorine TNTplus Vial Test (0.05 to 2.00 mg/L Cl2), 24 Tests, HACH, TNT867</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/water-hardness-tntplus-vial-test-20-350-mg-l-as-caco3-25-tests-hach-tnt869</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-TNT869.png?v=1786100452</image:loc>
      <image:title>Water Hardness TNTplus Vial Test (20 - 350 mg/L as CaCO3), 25 Tests, HACH, TNT869</image:title>
      <image:caption>Water Hardness TNTplus Vial Test (20 - 350 mg/L as CaCO3), 25 Tests, HACH, TNT869</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/alkalinity-total-tntplus-vial-test-25-400-mg-l-caco3-25-tests-hach-tnt870</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-TNT870.png?v=1786100452</image:loc>
      <image:title>Alkalinity (Total) TNTplus Vial Test (25-400 mg/L CaCO3), 25 Tests, HACH, TNT870</image:title>
      <image:caption>Alkalinity (Total) TNTplus Vial Test (25-400 mg/L CaCO3), 25 Tests, HACH, TNT870</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/volatile-acids-tntplus-vial-test-50-2-500-mg-l-25-tests-hach-tnt872</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-TNT872.png?v=1786506663</image:loc>
      <image:title>Volatile Acids TNTplus Vial Test (50-2,500 mg/L), 25 Tests, HACH, TNT872</image:title>
      <image:caption>Volatile Acids TNTplus Vial Test (50-2,500 mg/L), 25 Tests, HACH, TNT872</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/fluoride-tntplus-vial-test-0-1-2-5-mg-l-f-25-tests-hach-tnt878</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-TNT878_4baaad52-b3a9-4295-8afa-ab55559b3114.png?v=1786506665</image:loc>
      <image:title>Fluoride TNTplus Vial Test (0.1-2.5 mg/L F), 25 Tests, HACH, TNT878</image:title>
      <image:caption>Fluoride TNTplus Vial Test (0.1-2.5 mg/L F), 25 Tests, HACH, TNT878</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/chloride-tntplus-vial-test-1-0-1-000-mg-l-cl-24-tests-hach-tnt879</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-TNT879.png?v=1786100452</image:loc>
      <image:title>Chloride TNTplus Vial Test (1.0-1,000 mg/L Cl), 24 Tests, HACH, TNT879</image:title>
      <image:caption>Chloride TNTplus Vial Test (1.0-1,000 mg/L Cl), 24 Tests, HACH, TNT879</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/simplified-tkn-s-tkn-tntplus-vial-test-0-16-mg-l-n-25-tests-hach-tnt880</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-TNT880.png?v=1786506667</image:loc>
      <image:title>Simplified TKN (s-TKN) TNTplus Vial Test (0-16 mg/L N), 25 Tests, HACH, TNT880</image:title>
      <image:caption>Simplified TKN (s-TKN) TNTplus Vial Test (0-16 mg/L N), 25 Tests, HACH, TNT880</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/ph-electrode-general-purpose-single-junction-for-hi8314-and-hi9210n-pei-body-din-connector-1-m-cable-hanna-instruments-hi1217d</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAN-HI1217D.png?v=1786100453</image:loc>
      <image:title>pH Electrode, General Purpose Single Junction for HI8314 and HI9210N, PEI Body, DIN Connector, &amp; 1 m Cable, Hanna Instruments, HI1217D</image:title>
      <image:caption>pH Electrode, General Purpose Single Junction for HI8314 and HI9210N, PEI Body, DIN Connector, &amp; 1 m Cable, Hanna Instruments, HI1217D</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/spare-ph-electrode-for-the-hanna-piccolo-tester-hanna-instruments-hi1280</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAN-HI1280_b2a4946d-3d3d-4f99-a4fc-968cb3c09f3e.png?v=1786100454</image:loc>
      <image:title>Spare pH Electrode for the Hanna Piccolo Tester, Hanna Instruments, HI1280</image:title>
      <image:caption>Spare pH Electrode for the Hanna Piccolo Tester, Hanna Instruments, HI1280</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/ph-ec-tds-multiparameter-probe-with-cal-check-din-connector-3-3-ft-cable-hanna-instruments-hi1285-6</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAN-HI1285-6.png?v=1786506669</image:loc>
      <image:title>pH/EC/TDS Multiparameter Probe with CAL Check, DIN Connector, 3.3 ft Cable, Hanna Instruments, HI1285-6</image:title>
      <image:caption>pH/EC/TDS Multiparameter Probe with CAL Check, DIN Connector, 3.3 ft Cable, Hanna Instruments, HI1285-6</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/preamplified-ph-and-ec-electrode-for-hi99-series-meters-gel-filled-bnc-connector-1-m-cable-hanna-instruments-hi1288</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAN-HI1288.png?v=1786100457</image:loc>
      <image:title>Preamplified pH and EC  Electrode for HI99-Series Meters, Gel Filled, BNC Connector, 1 m Cable, Hanna Instruments, HI1288</image:title>
      <image:caption>Preamplified pH and EC  Electrode for HI99-Series Meters, Gel Filled, BNC Connector, 1 m Cable, Hanna Instruments, HI1288</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/ph-electrode-intelligent-with-temperature-sensor-single-junction-gel-filled-pei-body-din-connector-1-m-cable-for-field-applications-hanna-instruments-hi1618d</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAN-HI1618D.png?v=1786100458</image:loc>
      <image:title>pH Electrode, Intelligent  with Temperature Sensor, Single Junction, Gel-Filled, PEI Body, DIN Connector, 1 m Cable for Field Applications, Hanna Instruments, HI1618D</image:title>
      <image:caption>pH Electrode, Intelligent  with Temperature Sensor, Single Junction, Gel-Filled, PEI Body, DIN Connector, 1 m Cable for Field Applications, Hanna Instruments, HI1618D</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/sulfate-test-kit-low-and-high-range-hanna-instruments-hi38001</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAN-HI38001.png?v=1786100464</image:loc>
      <image:title>Sulfate Test Kit (Low and High Range), Hanna Instruments, HI38001</image:title>
      <image:caption>Sulfate Test Kit (Low and High Range), Hanna Instruments, HI38001</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/backpack-lab-water-quality-educational-test-kit-hanna-instruments-hi3817bp</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAN-HI3817BP.png?v=1786100465</image:loc>
      <image:title>Backpack Lab Water Quality Educational Test Kit, Hanna Instruments, HI3817BP</image:title>
      <image:caption>Backpack Lab Water Quality Educational Test Kit, Hanna Instruments, HI3817BP</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/glycol-chemical-test-kit-25-tests-hanna-instruments-hi3859</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAN-HI3859.png?v=1786100469</image:loc>
      <image:title>Glycol Chemical Test Kit, 25 Tests, Hanna Instruments, HI3859</image:title>
      <image:caption>Glycol Chemical Test Kit, 25 Tests, Hanna Instruments, HI3859</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/backpack-lab-soil-quality-educational-test-kit-hanna-instruments-hi3896bp</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAN-HI3896BP.png?v=1786100476</image:loc>
      <image:title>Backpack Lab Soil Quality Educational Test Kit, Hanna Instruments, HI3896BP</image:title>
      <image:caption>Backpack Lab Soil Quality Educational Test Kit, Hanna Instruments, HI3896BP</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/buffer-solution-ph-4-01-500-ml-bottle-hanna-instruments-hi7004l</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAN-HI7004L.png?v=1786100479</image:loc>
      <image:title>Buffer Solution, pH 4.01, 500 mL Bottle, Hanna Instruments, HI7004L</image:title>
      <image:caption>Buffer Solution, pH 4.01, 500 mL Bottle, Hanna Instruments, HI7004L</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/buffer-solution-ph-7-01-500-ml-bottle-hanna-instruments-hi7007l</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAN-HI7007L.png?v=1786100480</image:loc>
      <image:title>Buffer Solution, pH 7.01, 500 mL Bottle, Hanna Instruments, HI7007L</image:title>
      <image:caption>Buffer Solution, pH 7.01, 500 mL Bottle, Hanna Instruments, HI7007L</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/buffer-solution-ph-10-01-500-ml-bottle-hanna-instruments-hi7010l</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAN-HI7010L.png?v=1786100481</image:loc>
      <image:title>Buffer Solution, pH 10.01, 500 mL Bottle, Hanna Instruments, HI7010L</image:title>
      <image:caption>Buffer Solution, pH 10.01, 500 mL Bottle, Hanna Instruments, HI7010L</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/orp-test-solution-240-mv-25-degree-c-500-ml-hanna-instruments-hi7021l</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAN-HI7021L.png?v=1786100483</image:loc>
      <image:title>ORP Test Solution, 240 mV @ 25 Degree C, 500 mL, Hanna Instruments, HI7021L</image:title>
      <image:caption>ORP Test Solution, 240 mV @ 25 Degree C, 500 mL, Hanna Instruments, HI7021L</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/orp-test-solution-240-mv-at-25-degrees-c-230-ml-hanna-instruments-hi7021m</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAN-HI7021M.png?v=1786100496</image:loc>
      <image:title>ORP Test Solution, 240 mV at 25 degrees C, 230 mL, Hanna Instruments, HI7021M</image:title>
      <image:caption>ORP Test Solution, 240 mV at 25 degrees C, 230 mL, Hanna Instruments, HI7021M</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/orp-test-solution-at-470-mv-25-degrees-c-230-ml-bottle-hanna-instruments-hi7022m</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAN-HI7022M_86bfc0f9-65cb-4b0f-9252-a7c4d660ba85.png?v=1786100486</image:loc>
      <image:title>ORP Test Solution at 470 mV @ 25 Degrees C, 230 mL Bottle, Hanna Instruments, HI7022M</image:title>
      <image:caption>ORP Test Solution at 470 mV @ 25 Degrees C, 230 mL Bottle, Hanna Instruments, HI7022M</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/electrolyte-refilling-solution-for-polarographic-do-probes-500-ml-hanna-instruments-hi7041l</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAN-HI7041L_7e6f077b-4616-4ef5-8926-4184479cdeb2.png?v=1786100488</image:loc>
      <image:title>Electrolyte Refilling Solution for Polarographic DO Probes, 500 mL, Hanna Instruments, HI7041L</image:title>
      <image:caption>Electrolyte Refilling Solution for Polarographic DO Probes, 500 mL, Hanna Instruments, HI7041L</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/electrolyte-refilling-solution-for-polarographic-do-probes-230-ml-hanna-instruments-hi7041m</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAN-HI7041M_1e586679-1010-4f6b-8e94-8badc221b80e.png?v=1786100490</image:loc>
      <image:title>Electrolyte Refilling Solution for Polarographic DO Probes, 230 mL, Hanna Instruments, HI7041M</image:title>
      <image:caption>Electrolyte Refilling Solution for Polarographic DO Probes, 230 mL, Hanna Instruments, HI7041M</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/electrolyte-solution-3-5m-kcl-for-refillable-double-junction-ph-orp-electrodes-460-ml-hanna-instruments-hi7082l</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAN-HI7082L_98111464-ac73-4489-b2e6-b9727981bcdc.png?v=1786100491</image:loc>
      <image:title>Electrolyte Solution, 3.5M KCl for Refillable Double Junction pH/ORP Electrodes, 460 mL, Hanna Instruments, HI7082L</image:title>
      <image:caption>Electrolyte Solution, 3.5M KCl for Refillable Double Junction pH/ORP Electrodes, 460 mL, Hanna Instruments, HI7082L</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/shockproof-rubber-boot-orange-for-hi9819x-meters-hanna-instruments-hi710034</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAN-HI710034_e5dcc33d-addb-48a4-9212-80ba93054535.png?v=1786100493</image:loc>
      <image:title>Shockproof Rubber Boot, Orange for HI9819x Meters, Hanna Instruments, HI710034</image:title>
      <image:caption>Shockproof Rubber Boot, Orange for HI9819x Meters, Hanna Instruments, HI710034</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/caps-for-cuvettes-notched-to-fit-hi832xx-series-photometers-4-pk-hanna-instruments-hi731325n</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAN-HI731325N.png?v=1786100495</image:loc>
      <image:title>Caps for Cuvettes, Notched to Fit HI832xx Series Photometers, 4/PK, Hanna Instruments, HI731325N</image:title>
      <image:caption>Caps for Cuvettes, Notched to Fit HI832xx Series Photometers, 4/PK, Hanna Instruments, HI731325N</image:caption>
    </image:image>
  </url>
  <url>
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    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAN-HI740142P_888c2624-d0b3-4294-827c-5748ec55b9ff.png?v=1786100496</image:loc>
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      <image:caption>Graduated Syringe Set, 1 mL, 10/PK, Hanna Instruments, HI74042P</image:caption>
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  </url>
  <url>
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    <image:image>
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      <image:caption>Conductivity Probe, 4-Ring Platinum Potentiometric  with ATC, 1 m Cable &amp; DIN Connector, Hanna Instruments, HI76303</image:caption>
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      <image:title>Conductivity (EC) Sensor for HI769828 Probe, for HI9828 Series Meters, Hanna Instruments, HI769828-3</image:title>
      <image:caption>Conductivity (EC) Sensor for HI769828 Probe, for HI9828 Series Meters, Hanna Instruments, HI769828-3</image:caption>
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      <image:caption>Suction Lysimeter for Root Level Soil Monitoring, 60 cm, Hanna Instruments, HI83900</image:caption>
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      <image:caption>Dissolved Oxygen Meter, Waterproof, with Polarographic Probe Kit, Hanna Instruments, HI9142</image:caption>
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      <image:title>Alkalinity Reagents, 100 tests, Hanna Instruments, HI93755-01</image:title>
      <image:caption>Alkalinity Reagents, 100 tests, Hanna Instruments, HI93755-01</image:caption>
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      <image:title>Manganese High Range CAL Check Standards, Hanna Instruments, HI96709-11</image:title>
      <image:caption>Manganese High Range CAL Check Standards, Hanna Instruments, HI96709-11</image:caption>
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      <image:caption>pH/EC/TDS/Temperature Meter, Portable, with CAL Check and 3-in-1 Probe</image:caption>
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      <image:title>Direct Soil Measurement pH Portable Meter, Hanna Instruments, HI99121</image:title>
      <image:caption>Direct Soil Measurement pH Portable Meter, Hanna Instruments, HI99121</image:caption>
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      <image:title>Portable Plating pH  Meter Kit, with Electrode, DIN Connector, Hanna Instruments, HI99131</image:title>
      <image:caption>Portable Plating pH  Meter Kit, with Electrode, DIN Connector, Hanna Instruments, HI99131</image:caption>
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      <image:title>Portable pH Meter for Food and Dairy, Hanna Instruments, HI99161</image:title>
      <image:caption>Portable pH Meter for Food and Dairy, Hanna Instruments, HI99161</image:caption>
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      <image:caption>Free Chlorine Reagent Set for Process Chlorine Analyzer, Includes DPD Indicator Powder, Free Chlorine Indicator Solution and Free Chlorine Buffer Solutions, 100/PK</image:caption>
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      <image:caption>Free Chlorine Dispenser Reagent Set, 250 Tests/EA, 194900</image:caption>
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      <image:caption>PD 250 Reagent Refill, Free Chlorine, 250 Tests/EA, Lovibond, 530141, Not Regulated</image:caption>
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      <image:caption>VARIO Manganese LR Powder Pack Reagent Set, 10 mL Size, Range 0 To 0.7 mg/L, Parameter Manganese, 100/PK, Lovibond, 535090</image:caption>
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      <image:caption>VARIO Total Phosphate Reagent Set, Test-In-Tube, 50 Tests/PK, Tintometer, Inc, 535210 (8, UN3264, PG III; 8, 6.1, UN2923, PG II; 8, UN1824, PG II; 5.1, UN3215, PG III)</image:caption>
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      <image:title>VARIO Ammonia Nitrogen Reagent Set, 10 mL Sample Size, 100 Tests, Range 0 To 0.5 mg/L, Lovibond, 535500</image:title>
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      <image:title>DPD Pop Dispenser, Chlorine-Free, 10 mL, 400 Tests, For Test Kits Using Tablet Technology</image:title>
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      <image:title>DPD Pop Dispenser, Total Chlorine, 10 mL, 400 Tests. For Test kits Using Tablet Technology.</image:title>
      <image:caption>DPD Pop Dispenser, Total Chlorine, 10 mL, 400 Tests. For Test kits Using Tablet Technology.</image:caption>
    </image:image>
  </url>
  <url>
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    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
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      <image:caption>Chlorine Pocket Photometer, EPA Approved Method</image:caption>
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  <url>
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      <image:title>PPD-2 Dispenser for Free Chlorine, 5 ml Sample, Use with HF Scientific or HACH Photometer, 100 Tests</image:title>
      <image:caption>PPD-2 Dispenser for Free Chlorine, 5 ml Sample, Use with HF Scientific or HACH Photometer, 100 Tests</image:caption>
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      <image:title>PPD-2 Dispenser for Free Chlorine, 5 ml Sample, Use with HF Scientific or HACH Photometer, 1000 Tests</image:title>
      <image:caption>PPD-2 Dispenser for Free Chlorine, 5 ml Sample, Use with HF Scientific or HACH Photometer, 1000 Tests</image:caption>
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      <image:title>PPD-2 Dispenser for Total Chlorine, 5 ml Samples, Use with HF Scientific or HACH Photometer, 100 Tests</image:title>
      <image:caption>PPD-2 Dispenser for Total Chlorine, 5 ml Samples, Use with HF Scientific or HACH Photometer, 100 Tests</image:caption>
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      <image:title>PPD-2 Dispenser for Total Chlorine, 5 ml Samples, Use with HF Scientific or HACH Photometer, 1000 Tests</image:title>
      <image:caption>PPD-2 Dispenser for Total Chlorine, 5 ml Samples, Use with HF Scientific or HACH Photometer, 1000 Tests</image:caption>
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      <image:title>PPD-2 Dispenser for Free Chlorine, 10 mL Samples, Use with Hanna or HACH Photometer, 100 Tests</image:title>
      <image:caption>PPD-2 Dispenser for Free Chlorine, 10 mL Samples, Use with Hanna or HACH Photometer, 100 Tests</image:caption>
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      <image:title>PPD-2 Dispenser for Free Chlorine, 10 mL Samples, Use with Hanna or HACH Photometer, 1000 Tests</image:title>
      <image:caption>PPD-2 Dispenser for Free Chlorine, 10 mL Samples, Use with Hanna or HACH Photometer, 1000 Tests</image:caption>
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      <image:title>PPD-2 Dispenser for Total Chlorine, 10 mL Samples, Use with Hanna or HACH Photometer, 100 Tests</image:title>
      <image:caption>PPD-2 Dispenser for Total Chlorine, 10 mL Samples, Use with Hanna or HACH Photometer, 100 Tests</image:caption>
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  <url>
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      <image:title>PPD-2 Dispenser for Total Chlorine, 10 mL Samples, Use with Hanna or HACH Photometer, 1000 Tests</image:title>
      <image:caption>PPD-2 Dispenser for Total Chlorine, 10 mL Samples, Use with Hanna or HACH Photometer, 1000 Tests</image:caption>
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  <url>
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      <image:title>Micro 100 Laboratory Turbidimeter, 0 - 1000 NTU, 120 V 60 Hz, HF Scientific, 20001</image:title>
      <image:caption>Micro 100 Laboratory Turbidimeter, 0 - 1000 NTU, 120 V 60 Hz, HF Scientific, 20001</image:caption>
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      <image:title>Primary Turbidity Calibration Standard, 10 NTU, 125 ml, Enough for 4 Calibrations</image:title>
      <image:caption>Primary Turbidity Calibration Standard, 10 NTU, 125 ml, Enough for 4 Calibrations</image:caption>
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      <image:caption>Sample Cuvette 28 x 70 mm (replaces 28 x 93 mm), Use for Grab Sample, Includes Ten Threaded Light Shield Caps, Package of 10</image:caption>
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      <image:title>Lamp Source with 2 Leads, for HF Scientific Turbidimeter, 2/PK</image:title>
      <image:caption>Lamp Source with 2 Leads, for HF Scientific Turbidimeter, 2/PK</image:caption>
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      <image:title>Foodcare pH Electrode for Dairy/Semi-Solid Foods, PVDF Body, Open Junction, BNC Connector, 1 m Cable</image:title>
      <image:caption>Foodcare pH Electrode for Dairy/Semi-Solid Foods, PVDF Body, Open Junction, BNC Connector, 1 m Cable</image:caption>
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  <url>
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      <image:title>pH Electrode, SMART for Dairy/Semi-solid Foods, PVDF Body, DIN Connector, 1 m Cable, Hanna Instruments, FC202D</image:title>
      <image:caption>pH Electrode, SMART for Dairy/Semi-solid Foods, PVDF Body, DIN Connector, 1 m Cable, Hanna Instruments, FC202D</image:caption>
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  <url>
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    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HNA-HI1053B.png?v=1786100594</image:loc>
      <image:title>pH Electrode, Combination, Refillable with Glass Body, Double Junction, Conical Tip, BNC Connector, 1 m Cable, Hanna Instruments, HI1053B</image:title>
      <image:caption>pH Electrode, Combination, Refillable with Glass Body, Double Junction, Conical Tip, BNC Connector, 1 m Cable, Hanna Instruments, HI1053B</image:caption>
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  <url>
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    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HNA-HI1053P.png?v=1786100595</image:loc>
      <image:title>pH Electrode, Combination Glass, Refillable, Double Junction, with Glass Body, Conical Tip &amp; BNC + pin Connector, Hanna Instruments, HI1053P</image:title>
      <image:caption>pH Electrode, Combination Glass, Refillable, Double Junction, with Glass Body, Conical Tip &amp; BNC + pin Connector, Hanna Instruments, HI1053P</image:caption>
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    <changefreq>daily</changefreq>
    <image:image>
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      <image:title>Mini-Stirrer, Magnetic, Stainless Steel Cover,  110/115 VAC, 4.8 x 4.8 x 1.8 in. Hanna Instruments, HI200M-1</image:title>
      <image:caption>Mini-Stirrer, Magnetic, Stainless Steel Cover,  110/115 VAC, 4.8 x 4.8 x 1.8 in. Hanna Instruments, HI200M-1</image:caption>
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    <changefreq>daily</changefreq>
    <image:image>
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      <image:title>Ionic Strength Adjuster (ISA) for Ammonia and Cyanide ISEs, Hanna Instruments, HI4001-00</image:title>
      <image:caption>Ionic Strength Adjuster (ISA) for Ammonia and Cyanide ISEs, Hanna Instruments, HI4001-00</image:caption>
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      <image:title>Ammonia ISE 0.1M Standard, Hanna Instruments, HI4001-01</image:title>
      <image:caption>Ammonia ISE 0.1M Standard, Hanna Instruments, HI4001-01</image:caption>
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      <image:title>Ammonia ISE 100 ppm Standard, Hanna Instruments, HI4001-02</image:title>
      <image:caption>Ammonia ISE 100 ppm Standard, Hanna Instruments, HI4001-02</image:caption>
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      <image:title>Ammonia ISE 1000 ppm Standard, Hanna Instruments, HI4001-03</image:title>
      <image:caption>Ammonia ISE 1000 ppm Standard, Hanna Instruments, HI4001-03</image:caption>
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      <image:title>Ammonia ISE Filling Solution, Hanna Instruments, HI4001-40</image:title>
      <image:caption>Ammonia ISE Filling Solution, Hanna Instruments, HI4001-40</image:caption>
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      <image:caption>Ammonia ISE Conditioning and Storage Solution, Hanna Instruments, HI4001-45</image:caption>
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      <image:title>Ionic Strength Adjuster (ISA) for Nitrate ISEs, Hanna Instruments, HI4013-00</image:title>
      <image:caption>Ionic Strength Adjuster (ISA) for Nitrate ISEs, Hanna Instruments, HI4013-00</image:caption>
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      <image:title>Nitrate ISE 0.1M Standard, Hanna Instruments, HI4013-01</image:title>
      <image:caption>Nitrate ISE 0.1M Standard, Hanna Instruments, HI4013-01</image:caption>
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      <image:title>Nitrate ISE 100 ppm Standard, Hanna Instruments, HI4013-02</image:title>
      <image:caption>Nitrate ISE 100 ppm Standard, Hanna Instruments, HI4013-02</image:caption>
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    <image:image>
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      <image:title>Nitrate ISE 1000 ppm Standard, Hanna Instruments, HI4013-03</image:title>
      <image:caption>Nitrate ISE 1000 ppm Standard, Hanna Instruments, HI4013-03</image:caption>
    </image:image>
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    <image:image>
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      <image:title>Ammonia Combination Ion Selective Electrode (ISE), Hanna Instruments, HI4101</image:title>
      <image:caption>Ammonia Combination Ion Selective Electrode (ISE), Hanna Instruments, HI4101</image:caption>
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      <image:title>Nitrate Combination Ion Selective Electrode (ISE), Hanna Instruments, HI4113</image:title>
      <image:caption>Nitrate Combination Ion Selective Electrode (ISE), Hanna Instruments, HI4113</image:caption>
    </image:image>
  </url>
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      <image:title>pH 3.00 Buffer, Technical Grade, 500 mL Bottle, Hanna Instruments, HI5003</image:title>
      <image:caption>pH 3.00 Buffer, Technical Grade, 500 mL Bottle, Hanna Instruments, HI5003</image:caption>
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    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HNA-HI70031C.png?v=1786100623</image:loc>
      <image:title>1413 µS/cm Conductivity Standard w/ COA, 25 x 20 mL, Hanna Instruments, HI70031C</image:title>
      <image:caption>1413 µS/cm Conductivity Standard w/ COA, 25 x 20 mL, Hanna Instruments, HI70031C</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/ph-orp-electrode-storage-solution-230-ml-hanna-instruments-hi70300m</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HNA-HI70300M.png?v=1786100625</image:loc>
      <image:title>pH/ORP Electrode Storage Solution, 230 mL, Hanna Instruments, HI70300M</image:title>
      <image:caption>pH/ORP Electrode Storage Solution, 230 mL, Hanna Instruments, HI70300M</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/electrode-cleaning-solution-for-wine-deposits-500-ml-bottle-hanna-instruments-hi70635l</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HNA-HI70635L.png?v=1786100627</image:loc>
      <image:title>Electrode Cleaning Solution for Wine Deposits, 500 mL Bottle, Hanna Instruments, HI70635L</image:title>
      <image:caption>Electrode Cleaning Solution for Wine Deposits, 500 mL Bottle, Hanna Instruments, HI70635L</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/electrode-cleaning-solution-for-inorganic-substances-500-ml-hanna-instruments-hi7074l</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HNA-HI7074L.png?v=1786100629</image:loc>
      <image:title>Electrode Cleaning Solution for Inorganic Substances (500 mL), Hanna Instruments, HI7074L</image:title>
      <image:caption>Electrode Cleaning Solution for Inorganic Substances (500 mL), Hanna Instruments, HI7074L</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/electrolyte-solution-0-5m-nh42so4-4-x-30-ml-hanna-instruments-hi7078</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HNA-HI7078.png?v=1786100630</image:loc>
      <image:title>Electrolyte Solution 0.5M (NH4)2SO4, 4 x 30 mL, Hanna Instruments, HI7078</image:title>
      <image:caption>Electrolyte Solution 0.5M (NH4)2SO4, 4 x 30 mL, Hanna Instruments, HI7078</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/power-adapter-115-vac-to-12-vdc-for-hanna-meters-hanna-instruments-hi710005</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HNA-HI710005.png?v=1786100632</image:loc>
      <image:title>Power Adapter, 115 VAC to 12 VDC for Hanna Meters, Hanna Instruments, HI710005</image:title>
      <image:caption>Power Adapter, 115 VAC to 12 VDC for Hanna Meters, Hanna Instruments, HI710005</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/cuvette-caps-for-hi93-series-photometers-and-turbidity-meters-package-of-4-hanna-instruments-hi731325</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HNA-HI731325.png?v=1786100633</image:loc>
      <image:title>Cuvette Caps for HI93 Series Photometers and Turbidity Meters, Package of 4, Hanna Instruments, HI731325</image:title>
      <image:caption>Cuvette Caps for HI93 Series Photometers and Turbidity Meters, Package of 4, Hanna Instruments, HI731325</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/pipettor-fixed-volume-2000-microliters-hanna-instruments-hi731342</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HNA-HI731342.png?v=1786100634</image:loc>
      <image:title>Pipettor, Fixed Volume, 2000 microliters, Hanna Instruments, HI731342</image:title>
      <image:caption>Pipettor, Fixed Volume, 2000 microliters, Hanna Instruments, HI731342</image:caption>
    </image:image>
  </url>
  <url>
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    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HNA-HI731352.png?v=1786100635</image:loc>
      <image:title>Pipette Tips, Plastic, 2000 microliters, Package of 4, Hanna Instruments, HI731352</image:title>
      <image:caption>Pipette Tips, Plastic, 2000 microliters, Package of 4, Hanna Instruments, HI731352</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/5-ml-graduated-syringe-hanna-instruments-hi700226</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HNA-HI740226.png?v=1786100637</image:loc>
      <image:title>5 mL Graduated Syringe, Hanna Instruments, HI700226</image:title>
      <image:caption>5 mL Graduated Syringe, Hanna Instruments, HI700226</image:caption>
    </image:image>
  </url>
  <url>
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    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HNA-HI762PW.png?v=1786100638</image:loc>
      <image:title>Thermosistor Probe, General Purpose, White Handle, 1 m Cable, Up to 150 Degrees C, Hanna Instruments, HI762PW</image:title>
      <image:caption>Thermosistor Probe, General Purpose, White Handle, 1 m Cable, Up to 150 Degrees C, Hanna Instruments, HI762PW</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/electrode-holder-for-hi42xx-series-benchtop-meters-hanna-instruments-hi76404n</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HNA-HI76404N_c95672e4-cb26-425c-b86c-c8cc67e46707.png?v=1786100639</image:loc>
      <image:title>Electrode Holder for HI42xx Series Benchtop Meters, Hanna Instruments, HI76404N</image:title>
      <image:caption>Electrode Holder for HI42xx Series Benchtop Meters, Hanna Instruments, HI76404N</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/replacement-temperature-probe-with-phono-plug-connector-hanna-instruments-hi7669-2w</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HNA-HI7669_2_101f4467-d132-4d49-89a9-d208b47e761b.png?v=1787715359</image:loc>
      <image:title>Replacement Temperature Probe with Phono Plug Connector, Hanna Instruments, HI7669/2W</image:title>
      <image:caption>Replacement Temperature Probe with Phono Plug Connector, Hanna Instruments, HI7669/2W</image:caption>
    </image:image>
  </url>
  <url>
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    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HNA-HI766C.png?v=1786100641</image:loc>
      <image:title>Thermocouple Probe, K-Type Penetration  and 1 m Cable, Up to 900 Degrees C, Hanna Instruments, HI766C</image:title>
      <image:caption>Thermocouple Probe, K-Type Penetration  and 1 m Cable, Up to 900 Degrees C, Hanna Instruments, HI766C</image:caption>
    </image:image>
  </url>
  <url>
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    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HNA-HI766E2_5c4c6c0b-cc66-4d9b-a531-7387c858bb79.png?v=1786100643</image:loc>
      <image:title>Thermocouple Probe, K-Type Extended Length, with Handle and 1 m Cable, Up to 900 Degrees C, Hanna Instruments, HI766E2</image:title>
      <image:caption>Thermocouple Probe, K-Type Extended Length, with Handle and 1 m Cable, Up to 900 Degrees C, Hanna Instruments, HI766E2</image:caption>
    </image:image>
  </url>
  <url>
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    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HNA-HI766TR2.png?v=1786100644</image:loc>
      <image:title>Thermocouple Probe, K-Type Extended Length (3.3 ft) Penetration and 1 m Cable, Up to 250 Degrees C,Hanna Instruments, HI766TR2</image:title>
      <image:caption>Thermocouple Probe, K-Type Extended Length (3.3 ft) Penetration and 1 m Cable, Up to 250 Degrees C,Hanna Instruments, HI766TR2</image:caption>
    </image:image>
  </url>
  <url>
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    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HNA-HI935005.png?v=1786100646</image:loc>
      <image:title>Thermometer, K-Type Thermocouple, Dual Range, - 50 to 199.9 and 200 to 1350 Degrees C, Hanna Instruments, HI935005 [Probe Must be Purchased Separately]</image:title>
      <image:caption>Thermometer, K-Type Thermocouple, Dual Range, - 50 to 199.9 and 200 to 1350 Degrees C, Hanna Instruments, HI935005 [Probe Must be Purchased Separately]</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/thermometer-k-type-thermocouple-0-1-degree-resolution-dual-range-149-9-to-999-9-and-1000-to-1371-degrees-c-hanna-instruments-hi93530-probe-must-be-purchased-separately</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HNA-HI93530.png?v=1786100647</image:loc>
      <image:title>Thermometer, K-Type Thermocouple, 0.1 Degree Resolution, Dual Range, -149.9 to 999.9 and 1000 to 1371 Degrees C, Hanna Instruments, HI93530 [Probe Must Be Purchased Separately]</image:title>
      <image:caption>Thermometer, K-Type Thermocouple, 0.1 Degree Resolution, Dual Range, -149.9 to 999.9 and 1000 to 1371 Degrees C, Hanna Instruments, HI93530 [Probe Must Be Purchased Separately]</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/phosphorus-reagents-300-tests-hanna-instruments-hi93706-03</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HNA-HI93706-03_804cd498-6542-43ea-b851-0bc6490ad11b.png?v=1786100651</image:loc>
      <image:title>Phosphorus Reagents, 300 tests, Hanna Instruments, HI93706-03</image:title>
      <image:caption>Phosphorus Reagents, 300 tests, Hanna Instruments, HI93706-03</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/ammonia-medium-range-reagent-set-100-tests-0-00-to-9-99-mg-l-hanna-instruments-hi93715-01</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HNA-HI93715-01_391686f6-9e39-4ab7-9aae-eae8b72960fa.png?v=1786100653</image:loc>
      <image:title>Ammonia Medium Range Reagent Set, 100 Tests (0.00 to 9.99 mg/L), Hanna Instruments, HI93715-01</image:title>
      <image:caption>Ammonia Medium Range Reagent Set, 100 Tests (0.00 to 9.99 mg/L), Hanna Instruments, HI93715-01</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/iron-high-range-reagents-300-tests-hanna-instruments-hi93721-03</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HNA-HI93721-03.png?v=1786100655</image:loc>
      <image:title>Iron High Range Reagents, 300 tests, Hanna Instruments, HI93721-03</image:title>
      <image:caption>Iron High Range Reagents, 300 tests, Hanna Instruments, HI93721-03</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/dissolved-oxygen-reagents-100-tests-hanna-instruments-hi93732-01</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HNA-HI93732-01.png?v=1786100658</image:loc>
      <image:title>Dissolved Oxygen Reagents, 100 Tests, Hanna Instruments, HI93732-01</image:title>
      <image:caption>Dissolved Oxygen Reagents, 100 Tests, Hanna Instruments, HI93732-01</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/nitrite-low-range-portable-photometer-meter-only-hanna-instruments-hi96707</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HNA-HI96707.png?v=1786100660</image:loc>
      <image:title>Nitrite Low Range Portable Photometer, Meter Only, Hanna Instruments, HI96707</image:title>
      <image:caption>Nitrite Low Range Portable Photometer, Meter Only, Hanna Instruments, HI96707</image:caption>
    </image:image>
  </url>
  <url>
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    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HNT-047209.png?v=1786100661</image:loc>
      <image:title>Glass Sample Cup, Round, 2.5 in., Optical Glass, Withstands Temperature to 450 degrees C, Hunter Lab Glass, 04-7209-00</image:title>
      <image:caption>Glass Sample Cup, Round, 2.5 in., Optical Glass, Withstands Temperature to 450 degrees C, Hunter Lab Glass, 04-7209-00</image:caption>
    </image:image>
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  <url>
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    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
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    <image:image>
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      <image:title>Drive Chain Pusher Roll for Holmes Model 1400 Coal Sample Cutting Station</image:title>
      <image:caption>Drive Chain Pusher Roll for Holmes Model 1400 Coal Sample Cutting Station</image:caption>
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      <image:title>Drive Chain Pusher Pin w/Washers &amp; Cotters for Holmes Model 1400 Coal Sample Cutting Station</image:title>
      <image:caption>Drive Chain Pusher Pin w/Washers &amp; Cotters for Holmes Model 1400 Coal Sample Cutting Station</image:caption>
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      <image:title>Crosshead Bushing for Holmes Model 1400 Coal Sample Cutting Station</image:title>
      <image:caption>Crosshead Bushing for Holmes Model 1400 Coal Sample Cutting Station</image:caption>
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      <image:title>Crosshead Seal for Holmes Model 1400 Coal Sample Cutting Station</image:title>
      <image:caption>Crosshead Seal for Holmes Model 1400 Coal Sample Cutting Station</image:caption>
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  <url>
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      <image:title>Heater for Holmes Model 1400 Coal Sample Cutting Station</image:title>
      <image:caption>Heater for Holmes Model 1400 Coal Sample Cutting Station</image:caption>
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    <changefreq>daily</changefreq>
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      <image:title>Boron ICP Standard, 1000 micrograms/mL, 500 mL, 10007-4-500</image:title>
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    <image:image>
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      <image:caption>Cytiva Whatman Grade 934-AH Glass Microfiber Filters, Binder Free, 100/PK, 1827-035 [Representative Image}</image:caption>
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      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HRA-6784-2510.png?v=1786100675</image:loc>
      <image:title>Whatman Puradisc 25 mm Polytetrafluoroethylene Syringe Filter, 1.0 micron, Nonsterile, 50/PK, Cytiva, 6784-2510</image:title>
      <image:caption>Whatman Puradisc 25 mm Polytetrafluoroethylene Syringe Filter, 1.0 micron, Nonsterile, 50/PK, Cytiva, 6784-2510</image:caption>
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  <url>
    <loc>https://preiser.com/products/bunsen-round-jaw-extension-clamp-large-jaw-model</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HUM-H8572_7ea45bfc-4a7f-40f9-b146-146953fd6822.png?v=1786100678</image:loc>
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      <image:caption>Bunsen Round Jaw Extension Clamp, Large Jaw Model</image:caption>
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  </url>
  <url>
    <loc>https://preiser.com/products/i-chem-brand-n301-1000-nalgene-300-series-hdpe-wide-mouth-bottle-amber-certified-with-cap-capacity-1000-ml</loc>
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      <image:caption>I-Chem Brand N301-1000 Nalgene 300 Series HDPE Wide Mouth Bottle, Amber, Certified, with Cap, Capacity: 1000 mL</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/cctv-color-camera-1-2-in-ccd-480tvl-12-vdc-special-pricing-now-available</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
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      <image:caption>CCTV Color Camera, 1/2 in. CCD, 480TVL, 12 VDC, Boeckeler Instruments, JE3662HR</image:caption>
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  </url>
  <url>
    <loc>https://preiser.com/products/kimax-filter-chemical-funnel-125-mm-legacy</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
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      <image:caption>Kimax Filter Chemical Funnel, 125 mm, Legacy</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/ken-a-vision-1985-monocular-microscope</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/KAV-1985-01_0dfd33ca-f9c9-4187-bc20-8b98db282cdc.png?v=1786100685</image:loc>
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      <image:caption>Ken-A-Vision Model 1985 Monocular Microscope, KAV-1985</image:caption>
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  </url>
  <url>
    <loc>https://preiser.com/products/ken-a-vision-msc-binocular-microscope</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
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      <image:title>Ken-A-Vision Model MSC Binocular Microscope</image:title>
      <image:caption>Ken-A-Vision Model MSC Binocular Microscope</image:caption>
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  </url>
  <url>
    <loc>https://preiser.com/products/wypall-x70-wiper-9-1-x-16-8-in-blue-100-wipers-box</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
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      <image:caption>WYPALL X70 Wiper, 9.1 x 16.8 in., Blue, 100 Wipers/Box</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/master-lab-thermometer-length-457-mm-certified-0-4-25-37-44-5-56-105-degrees-c</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
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      <image:caption>Master Lab Thermometer, Length 457 mm, Certified @ 0, 4, 25, 37, 44.5, 56, 105 Degrees C</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/liquid-in-glass-thermometer-fractional-degree-precision-laboratory-thermometer-10-to-80-degrees-c</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/KES-2152.png?v=1786100692</image:loc>
      <image:title>Liquid-in-Glass Thermometer, Fractional Degree Precision Laboratory Thermometer, -10 to 80 degrees C</image:title>
      <image:caption>Liquid-in-Glass Thermometer, Fractional Degree Precision Laboratory Thermometer, -10 to 80 degrees C</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/microfiltration-funnel-with-stainless-steel-support-47-mm-diameter-support</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/KON-953805-0000_86aa39c1-68c3-4c92-b5a7-1cd21e5d8941.png?v=1786100694</image:loc>
      <image:title>Microfiltration Funnel with Stainless Steel Support, 47 mm Diameter Support</image:title>
      <image:caption>Microfiltration Funnel with Stainless Steel Support, 47 mm Diameter Support</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/test-tubes-for-model-1200-colorimeter-with-caps-10-ml-package-of-6</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/LAM-0290-6_c0252e97-3d3b-4049-b486-12eeb36fad8c.png?v=1786100695</image:loc>
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      <image:caption>Test Tubes, for Model 1200 Colorimeter, with Caps, 10 mL (Package of 6)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/glass-bottle-used-for-water-sampling-60-ml-lamotte-0688-do</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
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      <image:caption>Glass Bottle, Used for Water Sampling, 60 mL, LaMotte, 0688-DO</image:caption>
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  </url>
  <url>
    <loc>https://preiser.com/products/measuring-spoon-0-05-g</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
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      <image:caption>Measuring Spoon, 0.05 g</image:caption>
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  </url>
  <url>
    <loc>https://preiser.com/products/turbidity-standard-250-ntu-amco-60-ml</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
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      <image:caption>Turbidity Standard, 250 NTU Amco, 60 mL</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/turbidity-standard-0-ntu-iso-epa-60-ml</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
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      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/LAM-1480_2fd22a31-2b6a-4808-b8cc-bf7cfa6e5f88.png?v=1786100700</image:loc>
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      <image:caption>Turbidity Standard, 0 NTU, ISO/EPA, 60 mL</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/smart-registered-spectro-spectrophotometer-350-1000-nm-over-80-pre-programmed-tests-included</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
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      <image:caption>SMART (Registered) Spectro Spectrophotometer, 350-1000 nm, Over 80 Pre-Programmed Tests Included</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/wide-range-indicator-ph-reagent-3-30-ml-lamotte-2218-g</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
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      <image:caption>Wide Range Indicator, pH Reagent 3, 30 mL, LaMotte, 2218-G</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/dpd-chlorine-secondary-standards-kit-for-model-1200-colorimeter</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
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      <image:title>DPD Chlorine Secondary Standards Kit, for Model 1200 Colorimeter.</image:title>
      <image:caption>DPD Chlorine Secondary Standards Kit, for Model 1200 Colorimeter.</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/iron-reagent-1-bottle-of-30-ml-lamotte-4450-g</loc>
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      <image:caption>Iron Reagent # 1 (Bottle of 30 mL), LaMotte, 4450-G</image:caption>
    </image:image>
  </url>
  <url>
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      <image:caption>Iron Reagent #2, Powder, 4.5 g Bottle, LaMotte, 4451-S</image:caption>
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  <url>
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      <image:caption>Ammonia Nitrogen Reagent # 1, 60 mL Bottle, LaMotte, 4797WT-G</image:caption>
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  <url>
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      <image:caption>Ammonia Nitrogen Reagent # 2, 30 mL Bottle, LaMotte, 4798WT-G</image:caption>
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  <url>
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      <image:caption>DPD Powder # 1 , 100 g, LaMotte, 6807-J</image:caption>
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  <url>
    <loc>https://preiser.com/products/chlorine-dpd-3r-tablets-package-of-50</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
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      <image:caption>Chlorine DPD # 3R Tablets (Package of 50)</image:caption>
    </image:image>
  </url>
  <url>
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    <changefreq>daily</changefreq>
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      <image:caption>Chlorine DPD # 1R Tablets, 50/PK, LaMotte, 6999A-H</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/refill-for-total-hardness-test-kit-dc-lt-for-01-02-lamotte-r-4482-lt-01</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
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      <image:title>Refill for Total Hardness Test Kit DC-LT for -01 &amp; -02, LaMotte, R-4482-LT-01</image:title>
      <image:caption>Refill for Total Hardness Test Kit DC-LT for -01 &amp; -02, LaMotte, R-4482-LT-01</image:caption>
    </image:image>
  </url>
  <url>
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    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
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      <image:title>Dissolved Oxygen Kit Refill</image:title>
      <image:caption>Dissolved Oxygen Kit Refill</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/labcon-50-ml-superclear-centrifuge-tubes-without-lids-500-cs-representative-image</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
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      <image:title>Labcon 50 mL SuperClear Centrifuge Tubes (without Lids), 500/CS [Representative Image]</image:title>
      <image:caption>Labcon 50 mL SuperClear Centrifuge Tubes (without Lids), 500/CS [Representative Image]</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/steel-cable-pulley-for-door-1-in-labconco-corporation-1861400</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
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      <image:title>Steel Cable Pulley for Door, 1 in., Labconco Corporation, 1861400</image:title>
      <image:caption>Steel Cable Pulley for Door, 1 in., Labconco Corporation, 1861400</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/replacement-cable-clamp-for-protector-xstream-laboratory-fune-hoods</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
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      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/LCN-19201-00_887fdd15-4a29-4a50-877a-9fe6265d5272.png?v=1786100734</image:loc>
      <image:title>Replacement Cable Clamp for Protector XStream Laboratory Fune Hoods</image:title>
      <image:caption>Replacement Cable Clamp for Protector XStream Laboratory Fune Hoods</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/labconco-heater-assembly-230-v-600-w</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
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      <image:title>Labconco Heater Assembly, 230 V, 600 W</image:title>
      <image:caption>Labconco Heater Assembly, 230 V, 600 W</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/six-place-kjeldahl-distillation-apparatus-115v-50-60-hz-labconco-corporation-2127601</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
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      <image:title>Six-Place Kjeldahl Distillation Apparatus, 115V, 50-60 Hz, Labconco Corporation, 2127601</image:title>
      <image:caption>Six-Place Kjeldahl Distillation Apparatus, 115V, 50-60 Hz, Labconco Corporation, 2127601</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/six-place-kjeldahl-distillation-apparatus-230v-50-60-hz-labconco-corporation-2127602</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
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      <image:title>Six-Place Kjeldahl Distillation Apparatus, 230V, 50-60 Hz, Labconco Corporation, 2127602</image:title>
      <image:caption>Six-Place Kjeldahl Distillation Apparatus, 230V, 50-60 Hz, Labconco Corporation, 2127602</image:caption>
    </image:image>
  </url>
  <url>
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  <url>
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  <url>
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  <url>
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  <url>
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      <image:caption>6-Place Pipette Insert for Labconco Steamscrubbers and Flask Scrubbers, Labconco, 4575500</image:caption>
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  <url>
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  <url>
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      <image:caption>General Chemistry/UF Polishing Kit for WaterPro PS</image:caption>
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      <image:caption>Pre-Filter/Carbon Filter Kit for WaterPro RO Station, Includes 3 ea. [WaterPro RO System Shown]</image:caption>
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      <image:caption>Eschkas Mixture, Reagent Grade, Powder, For Sulfur Determination, Approximately 65% MgO, 35% Na2CO3.</image:caption>
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  <url>
    <loc>https://preiser.com/products/sodium-nitrite-granular-acs-500-g-avantor-performance-materials-7824-04-5-1-un1500-pg-iii</loc>
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      <image:caption>Sodium Nitrite, Granular, ACS 500 g, Avantor Performance Materials, 7824-04, 5.1, UN1500, PG III</image:caption>
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  <url>
    <loc>https://preiser.com/products/sodium-sulfate-anhydrous-granular-10-60-mesh-ar-acs-12-kg-bottle-baker-8024-20-non-regulated</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
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      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/MCW-8024-20.png?v=1786100842</image:loc>
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      <image:caption>Sodium Sulfate, Anhydrous, Granular (10-60 Mesh), AR (ACS), 12 kg Bottle, Baker 8024-20 (Non-Regulated)</image:caption>
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  <url>
    <loc>https://preiser.com/products/toluene-aracs-unique-reagent-4-l-poly-bottle-mallinckrodt-8608-16-3-un1294-p-g-ii</loc>
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      <image:caption>Toluene, AR(ACS), Unique Reagent, 4 L Poly Bottle, Mallinckrodt 8608-16 (3, UN1294, P.G. II)</image:caption>
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  <url>
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      <image:caption>Toluene, AR(ACS), Unique Reagent, 20 L Steel Pail, Mallinckrodt 8608-16 (3, UN1294, P.G. II)</image:caption>
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  <url>
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      <image:caption>Toluene Reagent, 200 L, Avantor Performance Materials, 8608-26, 3, UN1294, PGIII</image:caption>
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  </url>
  <url>
    <loc>https://preiser.com/products/iodine-monochloride-solution-standard-wijs-solution-sold-by-each-each-glass-bottle-of-4-l-8-un2920-p-g-ii</loc>
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      <image:caption>Iodine-Monochloride Solution, Standard, (Wijs Solution) (Sold by Each / Each = Glass Bottle of 4 L) (8, UN2920, P.G. II)</image:caption>
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  <url>
    <loc>https://preiser.com/products/hexadecane-99-0-sold-by-each-each-100-gram-glass-bottle-non-regulated</loc>
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      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/MCW-H223-57.png?v=1786100849</image:loc>
      <image:title>Hexadecane, 99.0% (Sold by Each / Each = 100 gram Glass Bottle) (Non-Regulated)</image:title>
      <image:caption>Hexadecane, 99.0% (Sold by Each / Each = 100 gram Glass Bottle) (Non-Regulated)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/nitric-acid-10-solution-standard-sold-by-each-each-glass-bottle-of-500-ml-8-un2031-p-g-ii</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
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      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/MCW-H262-01.png?v=1786100851</image:loc>
      <image:title>Nitric Acid, 10% Solution, StandARd (Sold by Each / Each = Glass Bottle of 500 mL) (8, UN2031, P.G. II)</image:title>
      <image:caption>Nitric Acid, 10% Solution, StandARd (Sold by Each / Each = Glass Bottle of 500 mL) (8, UN2031, P.G. II)</image:caption>
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  <url>
    <loc>https://preiser.com/products/hexanes-95-n-hexane-ultimar-4-l-glass-bottle-mallinckrodt-h487-10-3-un1208-p-g-ii</loc>
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      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/MCW-H487-10_6289fd09-c168-458c-8913-ffd40b9bc498.png?v=1786100852</image:loc>
      <image:title>Hexanes (95% n-Hexane) UltimAR, 4 L Glass Bottle, Mallinckrodt H487-10 (3, UN1208, P.G. II)</image:title>
      <image:caption>Hexanes (95% n-Hexane) UltimAR, 4 L Glass Bottle, Mallinckrodt H487-10 (3, UN1208, P.G. II)</image:caption>
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  </url>
  <url>
    <loc>https://preiser.com/products/wide-mouth-ldpe-wash-bottle-natural-250-ml-bel-art-products-f11620-0250</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
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    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/MCW-P4740250_7226f5c9-4c60-4730-8764-cf11dc2b47c4.png?v=1786100854</image:loc>
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      <image:caption>Wide-Mouth, LDPE Wash Bottle, Natural, 250 mL, Bel Art Products, F11620-0250</image:caption>
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  </url>
  <url>
    <loc>https://preiser.com/products/wide-mouth-wash-bottle-red-250-ml-polyethylene-bel-art-products-f11625-0250</loc>
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      <image:caption>Wide-Mouth Wash Bottle, Red, 250 mL, Polyethylene, Bel Art Products, F11625-0250</image:caption>
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  </url>
  <url>
    <loc>https://preiser.com/products/wide-mouth-wash-bottle-500-ml-polyethylene-red-bel-art-products-f11625-0500</loc>
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      <image:title>Wide-Mouth Wash Bottle.500 mL, Polyethylene, Red, Bel Art Products, F11625-0500</image:title>
      <image:caption>Wide-Mouth Wash Bottle.500 mL, Polyethylene, Red, Bel Art Products, F11625-0500</image:caption>
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  </url>
  <url>
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    <image:image>
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      <image:caption>Scienceware Polyethylene Carboy with Spigot, 2 gallons, Bel-Art Products, 11847-0030 [CLEARANCE STOCK EXHAUSTED-SPECIAL PRICING NO LONGER VALID-NOW AVAILABLE AT REGULAR PRICING]</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/pipet-jar-polyethylene-for-pipette-rinsing-system-bel-art-products-f17130-0024</loc>
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    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/MCW-P7120024_f7c731ab-86fa-41ea-b0f4-b8214b585a33.png?v=1786100859</image:loc>
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      <image:caption>Pipet Jar, Polyethylene, for Pipette Rinsing System, Bel Art Products, F17130-0024</image:caption>
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  </url>
  <url>
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    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/MCW-V078-46_e0a0dd35-d1b8-4689-ab80-c27c1c3955e7.png?v=1786100861</image:loc>
      <image:title>Hydrochloric Acid, AR Select Plus in a 2.5 L SAFEMORE Shatter-Resistant Bottle (8, UN1789, P.G. II)</image:title>
      <image:caption>Hydrochloric Acid, AR Select Plus in a 2.5 L SAFEMORE Shatter-Resistant Bottle (8, UN1789, P.G. II)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/chloroform-ultimar-mallinckrodt-v551-10-6-1-un1888-p-g-iii</loc>
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      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/MCW-V551-10_7fbf758a-fc0e-494b-8e37-83725130652d.png?v=1786100862</image:loc>
      <image:title>Chloroform, UltimAR, Mallinckrodt V551-10 (6.1, UN1888, P.G. III)</image:title>
      <image:caption>Chloroform, UltimAR, Mallinckrodt V551-10 (6.1, UN1888, P.G. III)</image:caption>
    </image:image>
  </url>
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    <image:image>
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      <image:title>pH Combination Electrode, DG115-SC, Glass Body, Mettler Toledo, 89806</image:title>
      <image:caption>pH Combination Electrode, DG115-SC, Glass Body, Mettler Toledo, 89806</image:caption>
    </image:image>
  </url>
  <url>
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      <image:title>MCE Membrane Filter 0.45 um White Plain 102 mm Nonsterile 25/Pk, Advantec MFS, Inc, A045A102C</image:title>
      <image:caption>MCE Membrane Filter 0.45 um White Plain 102 mm Nonsterile 25/Pk, Advantec MFS, Inc, A045A102C</image:caption>
    </image:image>
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  <url>
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      <image:title>Quartz Fiber Filter QR100 Grade 85 Wt 21 mm 100/Pk, Advantec MFS, Inc, QR10021MM</image:title>
      <image:caption>Quartz Fiber Filter QR100 Grade 85 Wt 21 mm 100/Pk, Advantec MFS, Inc, QR10021MM</image:caption>
    </image:image>
  </url>
  <url>
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    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
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      <image:title>MG-1000, Model 750 Local and Remote Controller with Foot Pedal, 115 VAC, 60 Hz</image:title>
      <image:caption>MG-1000, Model 750 Local and Remote Controller with Foot Pedal, 115 VAC, 60 Hz</image:caption>
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      <image:title>MG-1000 MicroGripper Tips, 10.0 mils x 1 in. Tip Diameter, 2.5 Tip Thickness</image:title>
      <image:caption>MG-1000 MicroGripper Tips, 10.0 mils x 1 in. Tip Diameter, 2.5 Tip Thickness</image:caption>
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      <image:title>MG-1000 MicroGripper Tips, 3.0 mils x 1 in. Tip Diameter, 2.5 thickness</image:title>
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      <image:caption>MG-1000 MicroGripper Tips, 75.0 mils x 1 in. Tip Diameter, 2.5 thickness, 2/Pkg</image:caption>
    </image:image>
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  <url>
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    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
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      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/MFT-GT150-75_857247b7-3d62-4606-aeb5-7570ea542298.png?v=1786100883</image:loc>
      <image:title>MG-1000 MicroGripper Tips, 75.0 mils x 1 in. Tip Diameter, 5 thickness, 2/Pkg</image:title>
      <image:caption>MG-1000 MicroGripper Tips, 75.0 mils x 1 in. Tip Diameter, 5 thickness, 2/Pkg</image:caption>
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  <url>
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    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
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      <image:title>MG-1000 MicroGripper Tips, 2.0 mils x 2 in. Tip Diameter, 2.5 Tip Thickness</image:title>
      <image:caption>MG-1000 MicroGripper Tips, 2.0 mils x 2 in. Tip Diameter, 2.5 Tip Thickness</image:caption>
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    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
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      <image:title>MG-1000 MicroGripper Tips, 5.0 mils x 2 in. Tip Diameter, 2.5 thickness</image:title>
      <image:caption>MG-1000 MicroGripper Tips, 5.0 mils x 2 in. Tip Diameter, 2.5 thickness</image:caption>
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      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/MFT-MG1000.png?v=1786100887</image:loc>
      <image:title>MG-1000 Microgripper Assembly (750 Controller and Gripper Tips, as Well as Micro-Manipulator if Required, Must be Purchased Separately)</image:title>
      <image:caption>MG-1000 Microgripper Assembly (750 Controller and Gripper Tips, as Well as Micro-Manipulator if Required, Must be Purchased Separately)</image:caption>
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  <url>
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    <changefreq>daily</changefreq>
    <image:image>
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      <image:title>M-2 / MG-1000 Micro-Manipulator</image:title>
      <image:caption>M-2 / MG-1000 Micro-Manipulator</image:caption>
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    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
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      <image:title>MG-1000 MicroGripper Tips - 1.5 mils x 1 in. Tip Diameter, 2.5 thickness</image:title>
      <image:caption>MG-1000 MicroGripper Tips - 1.5 mils x 1 in. Tip Diameter, 2.5 thickness</image:caption>
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  <url>
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    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
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      <image:caption>Microgripper Assembly (Controller &amp; Grippers, as Well as Micro-Manipulator if Required, Must be Purchased Separately)</image:caption>
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  </url>
  <url>
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  </url>
  <url>
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    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
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    <image:image>
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      <image:caption>M-2 Microgripper Tips, 4 to 17 Cylinder Size Gripped, 10 mils Thickness, 5x17</image:caption>
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  </url>
  <url>
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    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
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      <image:caption>M-2 Microgripper Tips, 8 to 15 Cylinder Size Gripped, 20 mils Thickness, 10x36</image:caption>
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  </url>
  <url>
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    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
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      <image:caption>M-2 Microgripper Tips, Straight Tips, 10 mils Thickness, 2x20</image:caption>
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  </url>
  <url>
    <loc>https://preiser.com/products/microflex-evolution-one-ev-2050-powder-free-latex-gloves-large-100-pk-ansell-ev-2050-l</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/MIF-EV2050-L_1fa57446-29a9-4631-8801-bd31be8f03c0.png?v=1786100898</image:loc>
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      <image:caption>MICROFLEX Evolution One EV-2050 Powder Free Latex Gloves, Large, 100/PK, Ansell, EV-2050-L</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/microflex-evolution-one-ev-2050-powder-free-latex-gloves-small-100-pk-ansell-ev-2050-s</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/MIF-EV2050-S.png?v=1786100900</image:loc>
      <image:title>MICROFLEX Evolution One EV-2050 Powder Free Latex Gloves, Small, 100/PK, Ansell, EV-2050-S</image:title>
      <image:caption>MICROFLEX Evolution One EV-2050 Powder Free Latex Gloves, Small, 100/PK, Ansell, EV-2050-S</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/microflex-evolution-one-ev-2050-powder-free-latex-gloves-x-large-100-pk-ansell-ev-2050-xl</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
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      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/MIF-EV2050-XL_4071524c-9682-4624-a3bf-18d067c48722.png?v=1786100901</image:loc>
      <image:title>MICROFLEX Evolution One EV-2050 Powder Free Latex Gloves, X-Large, 100/PK, Ansell, EV-2050-XL</image:title>
      <image:caption>MICROFLEX Evolution One EV-2050 Powder Free Latex Gloves, X-Large, 100/PK, Ansell, EV-2050-XL</image:caption>
    </image:image>
  </url>
  <url>
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    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/MIF-SY911-LG.png?v=1786100902</image:loc>
      <image:title>Glove, Microflex Synetron (Registered), Powder-Free Latex, Large, 50/PK, 10PK/CS, Insource, SY911-LG</image:title>
      <image:caption>Glove, Microflex Synetron (Registered), Powder-Free Latex, Large, 50/PK, 10PK/CS, Insource, SY911-LG</image:caption>
    </image:image>
  </url>
  <url>
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    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
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    <image:image>
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      <image:title>Glove, Microflex Synetron (Registered), Powder-Free Latex, Medium, 50/PK, 10PK/CS, Insource, SY911-M</image:title>
      <image:caption>Glove, Microflex Synetron (Registered), Powder-Free Latex, Medium, 50/PK, 10PK/CS, Insource, SY911-M</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/glove-microflex-synetron-registered-powder-free-latex-small-50-pk-10pk-cs-insource-sy911-s</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/MIF-SY911-S.png?v=1786100905</image:loc>
      <image:title>Glove, Microflex Synetron (Registered), Powder-Free Latex, Small, 50/PK, 10PK/CS, Insource, SY911-S</image:title>
      <image:caption>Glove, Microflex Synetron (Registered), Powder-Free Latex, Small, 50/PK, 10PK/CS, Insource, SY911-S</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/glove-microflex-synetron-registered-powder-free-latex-extra-large-50-pk-10pk-cs-insource-sy911-xl</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/MIF-SY911-XL_2cad0e38-3166-4722-a0d4-16ee95561d68.png?v=1786100906</image:loc>
      <image:title>Glove, Microflex Synetron (Registered), Powder-Free Latex, Extra Large, 50/PK, 10PK/CS, Insource, SY911-XL</image:title>
      <image:caption>Glove, Microflex Synetron (Registered), Powder-Free Latex, Extra Large, 50/PK, 10PK/CS, Insource, SY911-XL</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/glass-prefilter-47-mm-without-binders-package-of-500</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/MIL-AP4004705_1f122206-ab9d-4d9e-83b2-b601e0115ace.png?v=1786100908</image:loc>
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      <image:caption>Glass Prefilter, 47 mm, without binders (Package of 500)</image:caption>
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  </url>
  <url>
    <loc>https://preiser.com/products/filter-mf-millipore-mixed-cellulose-ester-membrane-0-45-um-diameter-47-mm-mean-thickness-105-180-um-plain-white-surface</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/MIL-HAWP4700_fb91ac22-31ef-4a27-a069-88cf85318a21.png?v=1786100909</image:loc>
      <image:title>Filter, MF-Millipore Mixed Cellulose Ester Membrane, 0.45 um Diameter 47 mm, Mean Thickness 105-180 um, Plain White Surface</image:title>
      <image:caption>Filter, MF-Millipore Mixed Cellulose Ester Membrane, 0.45 um Diameter 47 mm, Mean Thickness 105-180 um, Plain White Surface</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/microfil-funnel-filter-100-ml-0-45-m-47-mm-white-gridded-150-pk</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/MIL-MIHAWG100.png?v=1786100910</image:loc>
      <image:title>Microfil Funnel &amp; Filter, 100 mL, 0.45 m, 47 mm, White Gridded, 150/PK</image:title>
      <image:caption>Microfil Funnel &amp; Filter, 100 mL, 0.45 m, 47 mm, White Gridded, 150/PK</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/millipak%C2%AE-express-filter-0-22-micrometer-final-filter-for-millipore-water-systems-mpgp04001</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
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      <image:title>Millipak® Express Filter, 0.22 micrometer Final Filter for Millipore Water Systems, MPGP04001</image:title>
      <image:caption>Millipak® Express Filter, 0.22 micrometer Final Filter for Millipore Water Systems, MPGP04001</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/petri-dish-with-pads-sterile-package-of-100</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/MIL-PD10047S0.png?v=1786100913</image:loc>
      <image:title>Petri Dish with pads, Sterile (Package of 100)</image:title>
      <image:caption>Petri Dish with pads, Sterile (Package of 100)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/3-micron-mf-millipore-mixed-cellulose-esters-mce-membrane-filters-47mm-discs-hydrophilic-100-pk</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/MIL-SSWP04700.png?v=1786100914</image:loc>
      <image:title>3 micron MF-Millipore Mixed Cellulose Esters (MCE) Membrane Filters ~ 47mm Discs, Hydrophilic, 100/Pk</image:title>
      <image:caption>3 micron MF-Millipore Mixed Cellulose Esters (MCE) Membrane Filters ~ 47mm Discs, Hydrophilic, 100/Pk</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/vent-filter-for-milliq%C2%AE-dq3-water-system-2-pk-millipore-sigma-tankmpk03</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/MIL-TANKMPK03.png?v=1786100915</image:loc>
      <image:title>Vent Filter for MilliQ® DQ3 Water System, 2/PK, Millipore Sigma, TANKMPK03</image:title>
      <image:caption>Vent Filter for MilliQ® DQ3 Water System, 2/PK, Millipore Sigma, TANKMPK03</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/membrane-filter-0-05-um-x-47-mm-millipore-mixed-cellulose-ester</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/MIL-VMWP04700_54a2ae3b-0fe6-4ba2-930c-fa27a1069b4b.png?v=1786100916</image:loc>
      <image:title>Membrane Filter, 0.05 um x 47 mm, Millipore Mixed Cellulose Ester</image:title>
      <image:caption>Membrane Filter, 0.05 um x 47 mm, Millipore Mixed Cellulose Ester</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/replacement-bulb-6-v-30-watt-halogen-for-microscopes</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/MJI-MA326_e94fb0d6-16d3-4329-bbdd-2bf0a60bfa15.png?v=1786100919</image:loc>
      <image:title>Replacement Bulb, 6 V, 30 Watt, Halogen, for Microscopes, Meiji Techno America, MA326</image:title>
      <image:caption>Replacement Bulb, 6 V, 30 Watt, Halogen, for Microscopes, Meiji Techno America, MA326</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/meiji-ma457-zernike-phase-condenser-with-annul-iris-diaphragm-representative-image</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/MJI-MA457.png?v=1786100921</image:loc>
      <image:title>Zernike Phase Condenser with Annul &amp; Iris Diaphragm, Meiji Techno America, MA457</image:title>
      <image:caption>Zernike Phase Condenser with Annul &amp; Iris Diaphragm, Meiji Techno America, MA457</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/meiji-20x-super-wide-field-eyepiece-pair-fn-11-5-with-25-mm-reticle-mount</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/MJI-MA504.png?v=1786100922</image:loc>
      <image:title>20X Super Wide Field Eyepiece (Pair) FN 11.5, with 25 mm Reticle Mount, Meiji Techno America, MA504</image:title>
      <image:caption>20X Super Wide Field Eyepiece (Pair) FN 11.5, with 25 mm Reticle Mount, Meiji Techno America, MA504</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/meiji-ma602-binocular-microscope-body</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/MJI-MA602_163401fb-ce3f-4d2d-9a47-54d31c1e1c19.png?v=1786100924</image:loc>
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      <image:caption>Binocular Microscope Body, Meiji Techno America, MA602</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/meiji-ma749-binocular-microscope-head-ergonomic-adjustable-vertically-10-50-degree-accepts-30-mm-eyepieces-for-rz-series-microscopes</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
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      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/MJI-MA749_9462f468-d1cd-4005-9aa7-42026db51c39.png?v=1786100925</image:loc>
      <image:title>Binocular Microscope Head, Ergonomic Adjustable Vertically 10-50 Degree, Accepts 30 mm Eyepieces, For RZ Series Microscopes, Meiji Techno America, MA749</image:title>
      <image:caption>Binocular Microscope Head, Ergonomic Adjustable Vertically 10-50 Degree, Accepts 30 mm Eyepieces, For RZ Series Microscopes, Meiji Techno America, MA749</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/meiji-ml2000x-microscope-stand</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/MJI-ML2000X.png?v=1786100926</image:loc>
      <image:title>Microscope Stand, Meiji Techno America, ML2000X</image:title>
      <image:caption>Microscope Stand, Meiji Techno America, ML2000X</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/meiji-ml2955-binocular-microscope-10x-eyepiece-phase-10-20-40-100-x</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/MJI-ML2955.png?v=1786100927</image:loc>
      <image:title>Binocular Microscope, 10X Eyepiece, Phase, 10, 20, 40, 100 X, Meiji Techno America, ML2955</image:title>
      <image:caption>Binocular Microscope, 10X Eyepiece, Phase, 10, 20, 40, 100 X, Meiji Techno America, ML2955</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/polarizing-microscope-meiji-special-pricing-now-available</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/MJI-MLASB.png?v=1786100929</image:loc>
      <image:title>Polarizing Microscope, Meiji Techno America, MLASB</image:title>
      <image:caption>Polarizing Microscope, Meiji Techno America, MLASB</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/meiji-zernike-trinocular-phase-microscope-10x-eyepiece-10-20-40-100x</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/MJI-RMTHPH_01.png?v=1786100930</image:loc>
      <image:title>Zernike Trinocular Phase Microscope, 10X Eyepiece, 10, 20, 40, 100X Objectives, Meiji Techno America, RMTHPH/01</image:title>
      <image:caption>Zernike Trinocular Phase Microscope, 10X Eyepiece, 10, 20, 40, 100X Objectives, Meiji Techno America, RMTHPH/01</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/single-channel-pipettor-fixed-volume-200-ul</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/MLA-1026.png?v=1786100931</image:loc>
      <image:title>Single Channel Pipettor, Fixed Volume, 200 uL</image:title>
      <image:caption>Single Channel Pipettor, Fixed Volume, 200 uL</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/abrasive-blasting-cabinet-30-x-23-x-24-in-inside-mcmaster-carr-3283k5</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/MMC-3283K5.png?v=1786100933</image:loc>
      <image:title>Abrasive Blasting Cabinet, 30 x 23 x 24 in. Inside, McMaster-Carr, 3283K5</image:title>
      <image:caption>Abrasive Blasting Cabinet, 30 x 23 x 24 in. Inside, McMaster-Carr, 3283K5</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/bottle-narrow-mouth-cylinder-natural-hdpe-32-oz-1-l-without-cap-28-410-neck-finish-20932nh1</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/MON-77303-01_99e7ab77-1cbf-45e9-b87e-e7ef34fcbfad.png?v=1786506676</image:loc>
      <image:title>Bottle, Narrow-Mouth Cylinder, Natural, HDPE, 32 oz / 1 L, without Cap, 28-410 Neck Finish, 20932NH1</image:title>
      <image:caption>Bottle, Narrow-Mouth Cylinder, Natural, HDPE, 32 oz / 1 L, without Cap, 28-410 Neck Finish, 20932NH1</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/conductivity-ultra-meter-myron-l-6pllfce</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/MYR-6-P.png?v=1786100936</image:loc>
      <image:title>Conductivity, Ultra Meter, Myron L 6PllFCE</image:title>
      <image:caption>Conductivity, Ultra Meter, Myron L 6PllFCE</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/replacement-ph-orp-sensor-for-myron-ultrameter-models-3p-6p-and-6pii</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/MYR-RPR.png?v=1786100938</image:loc>
      <image:title>Replacement pH/ORP Sensor for Myron Ultrameter Models 3P, 6P and 6PII</image:title>
      <image:caption>Replacement pH/ORP Sensor for Myron Ultrameter Models 3P, 6P and 6PII</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/ph-orp-sensor-storage-solution-32-oz-1-l-myron-l-ss-q</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/MYR-SS-q.png?v=1786100939</image:loc>
      <image:title>pH/ORP Sensor Storage Solution, 32 oz / 1 L, Myron L, SS-Q</image:title>
      <image:caption>pH/ORP Sensor Storage Solution, 32 oz / 1 L, Myron L, SS-Q</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/techpro-ii-handheld-conductivity-total-dissolved-solids-tds-meter-myron-l-tp1</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/MYR-TP1.png?v=1786100940</image:loc>
      <image:title>TechPro II Handheld Conductivity/Total Dissolved Solids (TDS) Meter, Myron L, TP1</image:title>
      <image:caption>TechPro II Handheld Conductivity/Total Dissolved Solids (TDS) Meter, Myron L, TP1</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/cable-serial-rs-232c-for-pc-connectivity-for-genesys-spectrophotometer-thermo-electron-335942-000</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/MYY-335942-000.png?v=1786100941</image:loc>
      <image:title>Cable, Serial RS-232C For PC Connectivity for Genesys Spectrophotometer, Thermo Electron, 335942-000</image:title>
      <image:caption>Cable, Serial RS-232C For PC Connectivity for Genesys Spectrophotometer, Thermo Electron, 335942-000</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/clarity-wedge-0-to-50-nalco-500ncw100-88</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/NAC-500NCW100_88_f2538f5a-7380-490b-99ee-0a4784bf59dd.png?v=1786100943</image:loc>
      <image:title>Clarity Wedge, 0 to 50%, Nalco, 500NCW100.88</image:title>
      <image:caption>Clarity Wedge, 0 to 50%, Nalco, 500NCW100.88</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/nalgene-tank-cylindrical-heavy-duty-with-lid-linear-low-density-polyethylene-757-l-200-gal-11100-0200</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/NAL-11100-0200.png?v=1786100944</image:loc>
      <image:title>Nalgene Tank, Cylindrical Heavy-Duty with Lid, Linear Low-Density Polyethylene, 757 L / 200 Gal., 11100-0200</image:title>
      <image:caption>Nalgene Tank, Cylindrical Heavy-Duty with Lid, Linear Low-Density Polyethylene, 757 L / 200 Gal., 11100-0200</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/nalgene-rectangular-tank-with-cover-polypropylene-pp-38-l-10-gal-14200-0015</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/NAL-142000015.png?v=1786100946</image:loc>
      <image:title>Nalgene Rectangular Tank with Cover, Polypropylene (PP), 38 L / 10 gal., 14200-0015</image:title>
      <image:caption>Nalgene Rectangular Tank with Cover, Polypropylene (PP), 38 L / 10 gal., 14200-0015</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/155-filter-units-150-ml-capacity-mf75-series-polystyrene-housing-sfca-membrane-nalgene-155-0020</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/NAL-155-0020.png?v=1786100947</image:loc>
      <image:title>155 Filter Units - 150-ml Capacity, MF75 Series, polystyrene housing, SFCA membrane.  Nalgene 155-0020</image:title>
      <image:caption>155 Filter Units - 150-ml Capacity, MF75 Series, polystyrene housing, SFCA membrane.  Nalgene 155-0020</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/nalgene-bottle-round-narrow-mouth-teflon%C2%AE-perfluoroalkoxy-alkane-pfa-with-cap-500-ml-4-cs-thermo-scientific-1630-0016</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/NAL-16300-0016.png?v=1786100948</image:loc>
      <image:title>Nalgene Bottle, Round, Narrow-Mouth, Teflon® Perfluoroalkoxy Alkane (PFA) with Cap, 500 mL, 4/CS, Thermo Scientific, 1630-0016</image:title>
      <image:caption>Nalgene Bottle, Round, Narrow-Mouth, Teflon® Perfluoroalkoxy Alkane (PFA) with Cap, 500 mL, 4/CS, Thermo Scientific, 1630-0016</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/nalgene-syringe-filters-25-mm-1-1-micron-non-sterile-50-cs</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/NAL-189-2000.png?v=1787196957</image:loc>
      <image:title>Nalgene Syringe Filters, 25 mm, 1.1 micron, Non-Sterile, 50/CS</image:title>
      <image:caption>Nalgene Syringe Filters, 25 mm, 1.1 micron, Non-Sterile, 50/CS</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/membrane-filter-white-cellulose-nitrate-gridded-sterilewithout-pad-0-45-micron-47-mm-100-cs-nalge-nunc-international-corp-ds0205-4045</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/NAL-205-4045.png?v=1786100951</image:loc>
      <image:title>Membrane Filter, White Cellulose Nitrate, Gridded, Sterilewithout  Pad, 0.45 Micron, 47 mm, 100/CS, Nalge Nunc International Corp, DS0205-4045</image:title>
      <image:caption>Membrane Filter, White Cellulose Nitrate, Gridded, Sterilewithout  Pad, 0.45 Micron, 47 mm, 100/CS, Nalge Nunc International Corp, DS0205-4045</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/nalgene-fluorinated-hdpe-carboy-with-closure-20-l-4-cs-2097-0050</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/NAL-2097-0050.png?v=1786100952</image:loc>
      <image:title>Nalgene Fluorinated HDPE Carboy with Closure, 20 L, 4/CS, 2097-0050</image:title>
      <image:caption>Nalgene Fluorinated HDPE Carboy with Closure, 20 L, 4/CS, 2097-0050</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/nalgene-bottle-ip2-narrow-mouth-high-density-polyethylene-hdpe-with-polypropylene-pp-screw-cap-round-30-ml-72-cs-thermo-scientific-2099-0001</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/NAL-2099-0001.png?v=1786100954</image:loc>
      <image:title>Nalgene Bottle, IP2, Narrow-Mouth High-Density Polyethylene (HDPE) with Polypropylene (PP) Screw Cap, Round, 30 mL, 72/CS, Thermo Scientific, 2099-0001</image:title>
      <image:caption>Nalgene Bottle, IP2, Narrow-Mouth High-Density Polyethylene (HDPE) with Polypropylene (PP) Screw Cap, Round, 30 mL, 72/CS, Thermo Scientific, 2099-0001</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/nalgene-bottle-ip2-narrow-mouth-high-density-polyethylene-hdpe-with-polypropylene-pp-screw-cap-round-60-ml-72-cs-thermo-scientific-2099-0002</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/NAL-2099-0002_528f6c75-603e-47f2-a04e-1e4e3cd56b82.png?v=1786100955</image:loc>
      <image:title>Nalgene Bottle, IP2, Narrow-Mouth High-Density Polyethylene (HDPE) with Polypropylene (PP) Screw Cap, Round, 60 mL, 72/CS, Thermo Scientific, 2099-0002</image:title>
      <image:caption>Nalgene Bottle, IP2, Narrow-Mouth High-Density Polyethylene (HDPE) with Polypropylene (PP) Screw Cap, Round, 60 mL, 72/CS, Thermo Scientific, 2099-0002</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/nalgene-bottle-ip2-narrow-mouth-high-density-polyethylene-hdpe-with-polypropylene-pp-screw-cap-round-250-ml-12-pk-or-72-cs-thermo-scientific-2099-0008</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/NAL-20990008_9bc0d142-5d0c-46ee-b1cb-d6b0e06bbb99.png?v=1786100956</image:loc>
      <image:title>Nalgene Bottle, IP2, Narrow-Mouth High-Density Polyethylene (HDPE) with Polypropylene (PP) Screw Cap, Round, 250 mL, 12/PK or 72/CS, Thermo Scientific, 2099-0008</image:title>
      <image:caption>Nalgene Bottle, IP2, Narrow-Mouth High-Density Polyethylene (HDPE) with Polypropylene (PP) Screw Cap, Round, 250 mL, 12/PK or 72/CS, Thermo Scientific, 2099-0008</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/nalgene-bottle-wide-mouth-polypropylene-with-white-screw-closure-2000-ml-2115-2000</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/NAL-21152000.png?v=1786100958</image:loc>
      <image:title>Nalgene Bottle, Wide Mouth, Polypropylene, with White Screw Closure, 2000 mL, 2115-2000</image:title>
      <image:caption>Nalgene Bottle, Wide Mouth, Polypropylene, with White Screw Closure, 2000 mL, 2115-2000</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/nalgene-jar-straight-side-wide-mouth-with-white-polypropylene-screw-closure-2118-0002</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/NAL-21180002_33400a45-f4e4-40e7-ae8c-5e7a1d239a49.png?v=1786100959</image:loc>
      <image:title>Nalgene Jar, Straight-Side, Wide-Mouth, with White Polypropylene screw Closure,  2118-0002</image:title>
      <image:caption>Nalgene Jar, Straight-Side, Wide-Mouth, with White Polypropylene screw Closure,  2118-0002</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/nalgene-bottle-round-narrow-mouth-large-clear-polycarbonate-pc-with-polypropylene-cap-1-l-2205-0032</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/NAL-2205-0032.png?v=1786100960</image:loc>
      <image:title>Nalgene Bottle, Round, Narrow-Mouth, Large, Clear Polycarbonate (PC) with Polypropylene Cap, 1 L, 2205-0032</image:title>
      <image:caption>Nalgene Bottle, Round, Narrow-Mouth, Large, Clear Polycarbonate (PC) with Polypropylene Cap, 1 L, 2205-0032</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/nalgene-fluorinated-hdpe-jerrican-with-closure-10-l-nalge-nunc-international-corp-2242-0025-special-pricing-valid-only-until-current-stock-is-exhausted</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/NAL-22420025_f9e79194-e5c2-42b3-a287-c9ba01cd2e2b.png?v=1786100961</image:loc>
      <image:title>Nalgene Fluorinated HDPE Jerrican with Closure, 10 L, Nalge Nunc International Corp., 2242-0025  (SPECIAL PRICING VALID Only UNTIL CURRENT STOCK IS EXHAUSTED!)</image:title>
      <image:caption>Nalgene Fluorinated HDPE Jerrican with Closure, 10 L, Nalge Nunc International Corp., 2242-0025  (SPECIAL PRICING VALID Only UNTIL CURRENT STOCK IS EXHAUSTED!)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/nalgene-wash-bottle-wide-mouth-ldpe-1000-ml-thermo-scientific-2407-1000</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/NAL-2407-1000_5f37bd1e-7876-40b5-adec-669e18b50c6f.png?v=1786100963</image:loc>
      <image:title>Nalgene Wash Bottle, Wide-Mouth, LDPE, 1000 mL, Thermo Scientific, 2407-1000</image:title>
      <image:caption>Nalgene Wash Bottle, Wide-Mouth, LDPE, 1000 mL, Thermo Scientific, 2407-1000</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/nalgene-wash-bottle-wide-mouth-ldpe-500-ml-thermo-scientific-2407-0500</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/NAL-24070500.png?v=1786100964</image:loc>
      <image:title>Nalgene Wash Bottle, Wide-Mouth, LDPE, 500 mL, Thermo Scientific, 2407-0500</image:title>
      <image:caption>Nalgene Wash Bottle, Wide-Mouth, LDPE, 500 mL, Thermo Scientific, 2407-0500</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/nalgene-bottle-packaging-round-narrow-mouth-polypropylene-copolymer-ppco-with-polypropylene-pp-cap-30-ml-1000-cs-thermo-scientific-bulk-packaged-312087-0001</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/NAL-312087-0001.png?v=1786100966</image:loc>
      <image:title>Nalgene Bottle, Packaging, Round, Narrow-Mouth, Polypropylene Copolymer (PPCO) with Polypropylene (PP) Cap, 30 mL, 1000/CS, Thermo Scientific, Bulk Packaged, 312087-0001</image:title>
      <image:caption>Nalgene Bottle, Packaging, Round, Narrow-Mouth, Polypropylene Copolymer (PPCO) with Polypropylene (PP) Cap, 30 mL, 1000/CS, Thermo Scientific, Bulk Packaged, 312087-0001</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/nalgene-bottle-wide-mouth-high-density-polyethylene-hdpe-with-polypropylene-pp-screw-closure-1-l-32-oz-thermo-scientific-2104-0032</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/NAL-312104-0032_de65e1ee-1330-40ea-9a81-f35e297e88ba.png?v=1786100967</image:loc>
      <image:title>Nalgene Bottle, Wide-Mouth, High Density Polyethylene (HDPE) with Polypropylene (PP) Screw Closure, 1 L (32 oz.), Thermo Scientific, 2104-0032</image:title>
      <image:caption>Nalgene Bottle, Wide-Mouth, High Density Polyethylene (HDPE) with Polypropylene (PP) Screw Closure, 1 L (32 oz.), Thermo Scientific, 2104-0032</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/nalgene-bottle-round-narrow-mouth-high-density-polyethylene-hdpe-with-polypropylene-pp-cap-sterile-shrink-wrapped-1-l-24-cs-thermo-scientific-342089-0032</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/NAL-342089-0032_13072f02-8b3c-4879-89ec-4cc8a9d67f7a.png?v=1786100968</image:loc>
      <image:title>Nalgene Bottle, Round, Narrow-Mouth, High-Density Polyethylene (HDPE) with Polypropylene (PP) Cap, Sterile, Shrink-Wrapped, 1 L, 24/CS, Thermo Scientific, 342089-0032</image:title>
      <image:caption>Nalgene Bottle, Round, Narrow-Mouth, High-Density Polyethylene (HDPE) with Polypropylene (PP) Cap, Sterile, Shrink-Wrapped, 1 L, 24/CS, Thermo Scientific, 342089-0032</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/nalgene-cylinder-graduated-polymethylpentene-10-ml-3665-0010</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/NAL-36650010.png?v=1786100970</image:loc>
      <image:title>Nalgene Cylinder, Graduated, Polymethylpentene, 10 mL, 3665-0010</image:title>
      <image:caption>Nalgene Cylinder, Graduated, Polymethylpentene, 10 mL, 3665-0010</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/nalgene-polycarbonate-fernbach-culture-flask-2-8-l-4-cs-thermo-scientific-4105-2800</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/NAL-41052800.png?v=1786100971</image:loc>
      <image:title>Nalgene Polycarbonate Fernbach Culture Flask 2.8 L, 4/CS, Thermo Scientific, 4105-2800</image:title>
      <image:caption>Nalgene Polycarbonate Fernbach Culture Flask 2.8 L, 4/CS, Thermo Scientific, 4105-2800</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/flask-straight-neck-pc-1000-ml-6-cs-thermo-scientific-4110-1000</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/NAL-41101000_c5e07f16-9844-4ee3-9020-d7e2404a5945.png?v=1786100973</image:loc>
      <image:title>Flask Straight Neck PC 1000 mL, 6/CS, Thermo Scientific, 4110-1000</image:title>
      <image:caption>Flask Straight Neck PC 1000 mL, 6/CS, Thermo Scientific, 4110-1000</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/cylindrical-tank-with-cover-and-spigot-low-density-polyethlene-lldpe-15-gal-54102-0015</loc>
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  <url>
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  <url>
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  <url>
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      <image:caption>Nalgene Mason Jar Replacement Closures, 70 mm, Thermo Scientific, 712154-0700</image:caption>
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  <url>
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      <image:caption>Coal Fly Ash Standard 10 Grams</image:caption>
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  <url>
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  <url>
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      <image:caption>Graphite Crucible, [Representative Image]</image:caption>
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      <image:caption>Eddy Jet 2- Spiral Plater, Programmable Spiral Inoculation Instrument, 110 Vac, 50/60 Hz</image:caption>
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      <image:caption>Disposable Irradiated Syringes for Eddy Jet 2, 1000/PK</image:caption>
    </image:image>
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  <url>
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      <image:caption>Eddy Jet 2W-Spiral Plater, 110/220 VAC / 50/60 Hz, 120 W</image:caption>
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      <image:title>Nikon 130680HM Hoffman Modulated Achromat 10X [REPRESENTATIVE IMAGE]</image:title>
      <image:caption>Nikon 130680HM Hoffman Modulated Achromat 10X [REPRESENTATIVE IMAGE]</image:caption>
    </image:image>
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      <image:caption>Micrometer          (SPECIAL PRICING NOW AVAILABLE)</image:caption>
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      <image:title>Micrometer, 0 - 2 in. Y          (SPECIAL PRICING NOW AVAILABLE)</image:title>
      <image:caption>Micrometer, 0 - 2 in. Y          (SPECIAL PRICING NOW AVAILABLE)</image:caption>
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    </image:image>
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      <image:caption>Pure Water pH Test Kit, Buffers: 475 mL ea, ISA: 60 mL ea</image:caption>
    </image:image>
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      <image:caption>pH 7.0 Buffer, 475 mL, Orion, 910107</image:caption>
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      <image:caption>Orion pH 10.01 Buffer, Color-Coded, 910110</image:caption>
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      <image:caption>Standard All-in-One pH Buffer Kit, 475 mL EA, Orion, 910199</image:caption>
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      <image:caption>PAR-4570/4580 Series High Temperature/High Pressure Reactors by Parr Instruments, 1000 - 1800 mL, 5000 psi</image:caption>
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  </url>
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      <image:caption>PAR-4590 Series Micro Reactors by Parr Instruments, 25-100 mL, 3000 psi</image:caption>
    </image:image>
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      <image:caption>General Purpose Acid Digestion Vessel, 45 mL, 250 degrees C, 1800 psig, Parr Instruments 4744</image:caption>
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      <image:caption>Model 4748 Large Capacity Acid Digestion Vessels, 125 mL, Parr Instruments, 4748</image:caption>
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      <image:caption>Model 4749 General Purpose Acid Digestion Vessels, 23 mL, Parr Instruments, 4749</image:caption>
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      <image:caption>Microwave Acid Digestion Vessel, 23 mL, Parr Instruments, 4781</image:caption>
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      <image:caption>Quartz Liner, for 1108 Vessel, Parr 513A (Shown complete with Cover)</image:caption>
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      <image:caption>Quartz Cover, for 1108 Vessel, Parr 514A (Shown complete with Liner)</image:caption>
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      <image:caption>Parr 524A Capsule Liner, for Use in Conjunction with Stainless Steel Capsule, 100/EA</image:caption>
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  <url>
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      <image:title>PAR-5500 Series High Pressure, Compact Laboratory Reactors by Parr Instruments, 25-100 mL, 3000 psi</image:title>
      <image:caption>PAR-5500 Series High Pressure, Compact Laboratory Reactors by Parr Instruments, 25-100 mL, 3000 psi</image:caption>
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      <image:caption>Rupture Disk, Gold-Faced Inconel, for 1/4 in. Orifice, 2000 psi, Parr Instruments, 581HCPF</image:caption>
    </image:image>
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  <url>
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      <image:caption>Solution Calorimeter, for Measuring Enthalpy Changes Produced by Chemical Reactions in Solution, Parr 6755</image:caption>
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      <image:caption>Magnetic Drive for 4550 and 4580 Series Reactors, Parr Instruments, A1180HC</image:caption>
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      <image:caption>Replacement PTFE Cup with Cover, 23 mL for Use with PAR-4749 Acid Digestion Vessel, Parr Instruments, A280AC</image:caption>
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      <image:caption>Replacement PTFE Cup with Cover, 45 mL for Use with PAR-4744 Acid Digestion Vessel, Parr Instruments, A280AC2</image:caption>
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      <image:caption>Cup, Cover and O-Ring for 45 mL Acid Digestion Vessel, PTFE, PARR A328AC2</image:caption>
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      <image:caption>Extra Punch and Die Set, 3.0 mm for Parr Model 2811 Pellet Press, Parr, A51PR14</image:caption>
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      <image:caption>Socket Head Screw, Parr Instrument Company, SC1332SC03</image:caption>
    </image:image>
  </url>
  <url>
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    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
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    </image:image>
  </url>
  <url>
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    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
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      <image:caption>Cable, Backlight Inverter, Parr Instrument, A1806E</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/allen-wrench-9-64-socket-screw-key-parr-instrument-tx14sk</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
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      <image:caption>Allen Wrench, 9/64 Socket Screw Key, Parr Instrument, TX14SK</image:caption>
    </image:image>
  </url>
  <url>
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    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIA-10030-1.png?v=1786101135</image:loc>
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      <image:caption>Acetate Buffer, pH 4 for Chlorine and Iodine, 500 mL Bottle, 10030-1 (Non-Regulated)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/acetate-buffer-ph-4-for-chlorine-iodine-traceable-to-nist-1-l-poly-bottle-non-regulated</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIA-10030-2.png?v=1786101137</image:loc>
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      <image:caption>Acetate Buffer, pH 4, for Chlorine &amp; Iodine, Traceable to NIST, 1 L Poly Bottle, (Non-Regulated)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/acetate-buffer-ph-4-for-chlorine-iodine-traceable-to-nist-4-l-poly-bottle-non-regulated</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
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      <image:caption>Acetate Buffer, pH 4, for Chlorine &amp; Iodine, Traceable to NIST, 4 L Poly Bottle, (Non-Regulated)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/acetate-buffer-ph-6-0-for-aluminum-labchem-lc100701</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIA-10070-1_ccf26ad2-dcd4-4528-9d87-4222660528ab.png?v=1787369773</image:loc>
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      <image:caption>Acetate Buffer pH 6.0, for Aluminum, LabChem, LC100701</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/acetic-acid-3-v-v-1-19-poly-bottle-1-l-traceable-to-nist-non-regulated</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIA-10180-2.png?v=1786101142</image:loc>
      <image:title>Acetic Acid, 3% V/V (1+19) Poly Bottle, 1 L,  Traceable to NIST  (Non-Regulated)</image:title>
      <image:caption>Acetic Acid, 3% V/V (1+19) Poly Bottle, 1 L,  Traceable to NIST  (Non-Regulated)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/alkaline-iodide-solution-for-dissolved-oxygen-1-l-bottle-lc106402-8-un1824-p-g-ii</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIA-10640-2.png?v=1786101144</image:loc>
      <image:title>Alkaline Iodide Solution, for Dissolved Oxygen, 1 L Bottle, LC106402 (8, UN1824, P.G II)</image:title>
      <image:caption>Alkaline Iodide Solution, for Dissolved Oxygen, 1 L Bottle, LC106402 (8, UN1824, P.G II)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/alkaline-iodide-azide-solution-i-for-dissolved-oxygen-1-l-amber-poly-bottle-lc106702-8-un1824-p-g-ii</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIA-10670-2.png?v=1786101146</image:loc>
      <image:title>Alkaline Iodide Azide Solution I for Dissolved Oxygen, 1 L Amber Poly Bottle, LC106702 (8, UN1824, P.G. II)</image:title>
      <image:caption>Alkaline Iodide Azide Solution I for Dissolved Oxygen, 1 L Amber Poly Bottle, LC106702 (8, UN1824, P.G. II)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/acetone-technical-sold-by-each-each-357-lb-drum-3-un1090-p-g-ii</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIA-1080-52_f939fa71-9f51-418e-b76a-d84aed7f13bd.png?v=1787196971</image:loc>
      <image:title>Acetone Technical (Sold by Each / Each = 357 lb Drum) (3, UN1090, P.G. II)</image:title>
      <image:caption>Acetone Technical (Sold by Each / Each = 357 lb Drum) (3, UN1090, P.G. II)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/amine-sulfuric-acid-reagent-for-sulfide-500-ml-amber-glass-bottle-lc108801-8-un1830-p-g-ii</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIA-10880-1.png?v=1786101149</image:loc>
      <image:title>Amine-Sulfuric Acid Reagent for Sulfide, 500 mL Amber Glass Bottle, LC108801 (8, UN1830, P.G. II)</image:title>
      <image:caption>Amine-Sulfuric Acid Reagent for Sulfide, 500 mL Amber Glass Bottle, LC108801 (8, UN1830, P.G. II)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/ammonia-standard-1000-ppm-1-ml-1-mg-nh3-ammonium-chloride-water-traceable-to-nist-500-ml-poly-bottle-lc109001-non-regulated</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIA-10900-1.png?v=1786101152</image:loc>
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      <image:caption>Ammonia Standard, 1000 ppm, 1 mL=1 mg NH3, Ammonium Chloride Water, Traceable to NIST, 500 mL Poly Bottle, LC109001, (Non-Regulated)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/ammonium-acetate-buffer-for-iron-1-l-labchem-lc109702</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
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      <image:title>Ammonium Acetate Buffer, for Iron, 1 L, LabChem, LC109702</image:title>
      <image:caption>Ammonium Acetate Buffer, for Iron, 1 L, LabChem, LC109702</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/ammonium-oxalate-monohydrate-acs-500-g-poly-bottle-lc112701-8-un1759-p-g-iii</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIA-11270-1_4cb4f9c3-8928-43c3-bb71-ff3be186815f.png?v=1786101155</image:loc>
      <image:title>Ammonium Oxalate Monohydrate, ACS, 500 g Poly Bottle, LC112701 (8, UN1759, P.G. III)</image:title>
      <image:caption>Ammonium Oxalate Monohydrate, ACS, 500 g Poly Bottle, LC112701 (8, UN1759, P.G. III)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/ammonium-phosphate-40-500-ml-poly-bottle-lc112951-non-regulated</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
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      <image:title>Ammonium Phosphate, 40%, 500 mL Poly Bottle, LC112951 (Non-Regulated)</image:title>
      <image:caption>Ammonium Phosphate, 40%, 500 mL Poly Bottle, LC112951 (Non-Regulated)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/ammonia-as-nitrogen-standard-1000-ppm-1-ml-1-mg-n-1-ml-1-22mg-nh3-ammonium-chloride-water-traceable-to-nist-500-ml-poly-bottle-lc179401-non-regulated</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIA-17940-1_89b9a424-656e-4838-9ed5-9779c8cda710.png?v=1786764909</image:loc>
      <image:title>Ammonia (as Nitrogen) Standard, 1000 ppm, 1 mL=1 mg N (1 mL=1.22mg NH3) Ammonium Chloride Water, Traceable to NIST, 500 mL Poly Bottle, LC179401 (Non-Regulated)</image:title>
      <image:caption>Ammonia (as Nitrogen) Standard, 1000 ppm, 1 mL=1 mg N (1 mL=1.22mg NH3) Ammonium Chloride Water, Traceable to NIST, 500 mL Poly Bottle, LC179401 (Non-Regulated)</image:caption>
    </image:image>
  </url>
  <url>
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    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIA-17940-7.png?v=1786101160</image:loc>
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      <image:caption>Ammonia (As Nitrogen) Standard, 1000 ppm, 1 mL = 1 mg N, 1 mL = 1.22 mg NH3), 125 mL, LabChem, LC179407</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/boric-acid-granular-technical-grade-55-00-lb-13400-bag</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIB-1100-85_bdc4bdcd-8264-4b2f-812b-214a24b93d4c.png?v=1786101162</image:loc>
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      <image:caption>Boric Acid, Granular, Technical Grade, 55.00 lb, 13400-BAG</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/borate-buffer-for-nitrogen-ammonia-for-nitrogen-organic-traceable-to-nist-1-l-poly-bottle-non-regulated</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIB-11700-2.png?v=1786101164</image:loc>
      <image:title>Borate Buffer, for Nitrogen (Ammonia), for Nitrogen (Organic) Traceable to NIST, 1 L Poly Bottle, (Non-Regulated)</image:title>
      <image:caption>Borate Buffer, for Nitrogen (Ammonia), for Nitrogen (Organic) Traceable to NIST, 1 L Poly Bottle, (Non-Regulated)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/borate-buffer-ph-9-5-sold-by-each-each-4-l-poly-bottle-non-regulated</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIB-11700-4_095e3083-bbe3-466b-a05b-4947cc8878db.png?v=1786101166</image:loc>
      <image:title>Borate Buffer, pH 9.5 (Sold by Each / Each = 4 L Poly Bottle) (Non-Regulated)</image:title>
      <image:caption>Borate Buffer, pH 9.5 (Sold by Each / Each = 4 L Poly Bottle) (Non-Regulated)</image:caption>
    </image:image>
  </url>
  <url>
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    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIB-11720-4.png?v=1786419200</image:loc>
      <image:title>Boric Acid, 2%, 4L, LC117204</image:title>
      <image:caption>Boric Acid, 2%, 4L, LC117204</image:caption>
    </image:image>
  </url>
  <url>
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    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
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      <image:title>Boric Acid, 4% (Sold by Each / Each = 4 L Poly Bottle) (Non-Regulated)</image:title>
      <image:caption>Boric Acid, 4% (Sold by Each / Each = 4 L Poly Bottle) (Non-Regulated)</image:caption>
    </image:image>
  </url>
  <url>
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    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIB-11770-2.png?v=1786101171</image:loc>
      <image:title>Boric Acid, 2% w/v with Indicator Methylene Blue-Methyl Red, for Nitrogen (Ammonia), for Nitrogen (Organic), 1 L Poly Bottle, (Non-Regulated)</image:title>
      <image:caption>Boric Acid, 2% w/v with Indicator Methylene Blue-Methyl Red, for Nitrogen (Ammonia), for Nitrogen (Organic), 1 L Poly Bottle, (Non-Regulated)</image:caption>
    </image:image>
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  <url>
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    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIB-11770-4_75a07d07-a299-4616-b576-234ac39cd760.png?v=1786101173</image:loc>
      <image:title>Boric Acid, 2% w/v with Indicator Methylene Blue-Methyl Red, for Nitrogen (Ammonia), for Nitrogen (Organic), 4 L Poly Bottle, (Non-Regulated)</image:title>
      <image:caption>Boric Acid, 2% w/v with Indicator Methylene Blue-Methyl Red, for Nitrogen (Ammonia), for Nitrogen (Organic), 4 L Poly Bottle, (Non-Regulated)</image:caption>
    </image:image>
  </url>
  <url>
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    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIB-11850-7.png?v=1786101176</image:loc>
      <image:title>Bromocresol Green, 0.1% w/v Aqueous, pH 3.8 - 5.4 Yellow to Blue, 125 mL Poly Bottle, Labchem, LC118507</image:title>
      <image:caption>Bromocresol Green, 0.1% w/v Aqueous, pH 3.8 - 5.4 Yellow to Blue, 125 mL Poly Bottle, Labchem, LC118507</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/bromocresol-green-methyl-red-aqueous-for-alkalinity-500-ml-amber-poly-bottle-labchem-lc118701</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
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      <image:title>Bromocresol Green - Methyl Red, Aqueous, for Alkalinity, 500 mL Amber Poly Bottle, Labchem, LC118701</image:title>
      <image:caption>Bromocresol Green - Methyl Red, Aqueous, for Alkalinity, 500 mL Amber Poly Bottle, Labchem, LC118701</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/labchem-bromine-water-saturated-500ml</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIB-12000-1.png?v=1786101181</image:loc>
      <image:title>LabChem Bromine Water, Saturated, 500mL</image:title>
      <image:caption>LabChem Bromine Water, Saturated, 500mL</image:caption>
    </image:image>
  </url>
  <url>
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    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIB-12020-1_4561b2f8-31d3-44a7-b62c-b4da66e33d61.png?v=1786101183</image:loc>
      <image:title>Bromophenol Blue, 0.04% Aqueous, pH 3.0 to 4.6, Yellow to Blue, 500 mL Poly Bottle, LC120201 (Non-Regulated)</image:title>
      <image:caption>Bromophenol Blue, 0.04% Aqueous, pH 3.0 to 4.6, Yellow to Blue, 500 mL Poly Bottle, LC120201 (Non-Regulated)</image:caption>
    </image:image>
  </url>
  <url>
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    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIB-12030-1.png?v=1786101186</image:loc>
      <image:title>Bromophenol Blue, 0.1% Aqueous, pH 3.0 - 4.6 Yellow to Blue, 500 mL, Labchem, LC120301</image:title>
      <image:caption>Bromophenol Blue, 0.1% Aqueous, pH 3.0 - 4.6 Yellow to Blue, 500 mL, Labchem, LC120301</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/bromothymol-blue-0-04-aqueous-ph-6-0-7-6-yellow-to-blue-500-ml-poly-bottle-labchem-lc120501</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIB-12050-1_bde92a06-8e5f-410d-a365-1cb41374f2fe.png?v=1787715368</image:loc>
      <image:title>Bromothymol Blue, 0.04% Aqueous, pH 6.0 - 7.6 Yellow to Blue, 500 mL Poly Bottle, Labchem, LC120501</image:title>
      <image:caption>Bromothymol Blue, 0.04% Aqueous, pH 6.0 - 7.6 Yellow to Blue, 500 mL Poly Bottle, Labchem, LC120501</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/bromothymol-blue-0-04-aqueous-ph-6-0-to-7-6-yellow-to-blue-125-ml-poly-bottle-lc120507-non-regulated</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIB-12050-7_a0a1b4e6-cbd0-419d-957a-f9487b7099dd.png?v=1787110542</image:loc>
      <image:title>Bromothymol Blue, 0.04% Aqueous, pH 6.0 to 7.6, Yellow to Blue, 125 mL Poly Bottle, LC120507 (Non-Regulated)</image:title>
      <image:caption>Bromothymol Blue, 0.04% Aqueous, pH 6.0 to 7.6, Yellow to Blue, 125 mL Poly Bottle, LC120507 (Non-Regulated)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/buffer-solution-ph-6-86-at-25-degrees-c-500-ml-poly-bottle-labchem-lc123501</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIB-12350-1.png?v=1786101194</image:loc>
      <image:title>Buffer Solution pH 6.86 at 25 degrees C, 500 mL Poly Bottle, Labchem, LC123501</image:title>
      <image:caption>Buffer Solution pH 6.86 at 25 degrees C, 500 mL Poly Bottle, Labchem, LC123501</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/buffer-solution-ph-6-86-4-l-poly-bottle-lc123504-non-regulated</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIB-12350-4.png?v=1786101196</image:loc>
      <image:title>Buffer Solution, pH 6.86, 4 L Poly Bottle, LC123504 (Non-Regulated)</image:title>
      <image:caption>Buffer Solution, pH 6.86, 4 L Poly Bottle, LC123504 (Non-Regulated)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/ph-buffer-6-86-10-l-cubitainer</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIB-12350-6_0101bd1a-5787-45f3-8fac-efab3ae5381a.png?v=1786101200</image:loc>
      <image:title>pH Buffer, 6.86, 10 L Cubitainer</image:title>
      <image:caption>pH Buffer, 6.86, 10 L Cubitainer</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/buffer-solution-ph-8-0-4-l-poly-bottle-lc124204-non-regulated</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIB-12420-4.png?v=1786506725</image:loc>
      <image:title>Buffer Solution, pH 8,0, 4 L Poly Bottle, LC124204 (Non-Regulated)</image:title>
      <image:caption>Buffer Solution, pH 8,0, 4 L Poly Bottle, LC124204 (Non-Regulated)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/buffer-solution-ph-9-18-sold-by-each-each-poly-bottle-of-4-l-non-regulated</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIB-12450-4.png?v=1786101204</image:loc>
      <image:title>Buffer Solution, pH 9.18 (Sold by Each / Each = Poly Bottle of 4 L) (Non-Regulated)</image:title>
      <image:caption>Buffer Solution, pH 9.18 (Sold by Each / Each = Poly Bottle of 4 L) (Non-Regulated)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/buffer-solution-ph-12-0-500-ml-poly-bottle-lc125601-non-regulated</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIB-12560-1.png?v=1786101208</image:loc>
      <image:title>Buffer Solution, pH 12.0, 500 mL Poly Bottle, LC125601 (Non-Regulated)</image:title>
      <image:caption>Buffer Solution, pH 12.0, 500 mL Poly Bottle, LC125601 (Non-Regulated)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/methylene-blue-0-1-aqueous-500-ml-poly-bottle-lc169001-non-regulated</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIB-16900-1.png?v=1786101210</image:loc>
      <image:title>Methylene Blue, 0.1% Aqueous, 500 mL Poly Bottle, LC169001 (Non-Regulated)</image:title>
      <image:caption>Methylene Blue, 0.1% Aqueous, 500 mL Poly Bottle, LC169001 (Non-Regulated)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/methylene-blue-0-1-aqueous-1-l-poly-bottle-labchem-lc169002</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIB-16900-2_2a478ee9-af9d-4ed0-88c6-bdf874472ec2.png?v=1786101212</image:loc>
      <image:title>Methylene Blue, 0.1% Aqueous, 1 L Poly Bottle, Labchem, LC169002</image:title>
      <image:caption>Methylene Blue, 0.1% Aqueous, 1 L Poly Bottle, Labchem, LC169002</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/calcium-aa-standard-1000-ppm-1-ml-1-mg-ca-calcium-carbonate-dilute-nitric-acid-traceable-to-nist-500-ml-poly-bottle-lc126501-non-regulated</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIC-12650-1.png?v=1786101214</image:loc>
      <image:title>Calcium AA Standard, 1000 ppm, (1 mL-1 mg Ca), Calcium Carbonate-dilute nitric acid, Traceable to NIST, 500 mL Poly Bottle, LC126501 (Non-Regulated)</image:title>
      <image:caption>Calcium AA Standard, 1000 ppm, (1 mL-1 mg Ca), Calcium Carbonate-dilute nitric acid, Traceable to NIST, 500 mL Poly Bottle, LC126501 (Non-Regulated)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/calcium-carbonate-standard-apha-astm-1-ml-1-mg-caco3-0-4-mg-ca-calcium-carbonate-hydrochloric-acid-for-hardness-traceable-to-nist-500-ml-poly-bottle-lc127001-non-regulated</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIC-12700-1.png?v=1786101216</image:loc>
      <image:title>Calcium Carbonate Standard, APHA, ASTM, (1 mL=1 mg CaCO3 = 0.4 mg Ca), Calcium Carbonate - Hydrochloric Acid, for Hardness, Traceable to NIST, 500 mL Poly Bottle, LC127001 (Non-Regulated)</image:title>
      <image:caption>Calcium Carbonate Standard, APHA, ASTM, (1 mL=1 mg CaCO3 = 0.4 mg Ca), Calcium Carbonate - Hydrochloric Acid, for Hardness, Traceable to NIST, 500 mL Poly Bottle, LC127001 (Non-Regulated)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/calcium-chloride-2-75-w-v-for-bod-500-ml-poly-bottle-labchem-lc127301</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIC-12730-1.png?v=1786101218</image:loc>
      <image:title>Calcium Chloride, 2.75% w/v, for BOD, 500 mL Poly Bottle, Labchem, LC127301</image:title>
      <image:caption>Calcium Chloride, 2.75% w/v, for BOD, 500 mL Poly Bottle, Labchem, LC127301</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/calcium-chloride-2-75-1-l-poly-bottle-lc127302-non-regulated</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIC-12730-2_d70f4207-9bd7-47b4-bb2d-7484b607eef7.png?v=1787628914</image:loc>
      <image:title>Calcium Chloride, 2.75%, 1 L Poly Bottle, LC127302 (Non-Regulated)</image:title>
      <image:caption>Calcium Chloride, 2.75%, 1 L Poly Bottle, LC127302 (Non-Regulated)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/calmagite-indicator-0-1-aqueous-500-ml-poly-bottle-lc128501-non-regulated</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIC-12850-1_87475ecc-6282-485c-86ae-781d7e619013.png?v=1786101235</image:loc>
      <image:title>Calmagite Indicator, 0.1% Aqueous, 500 mL Poly Bottle, LC128501 (Non-Regulated)</image:title>
      <image:caption>Calmagite Indicator, 0.1% Aqueous, 500 mL Poly Bottle, LC128501 (Non-Regulated)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/carbon-standard-1000-ppm-organic-1-ml-1-mg-c-potassium-hydrogen-phthalate-water-traceable-to-nist-500-ml-poly-bottle-lc129101-non-regulated</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIC-12910-1.png?v=1786101224</image:loc>
      <image:title>Carbon Standard, 1000 ppm, Organic, 1 mL=1 mg C, Potassium Hydrogen Phthalate-Water, Traceable to NIST, 500 mL Poly Bottle, LC129101, (Non-Regulated)</image:title>
      <image:caption>Carbon Standard, 1000 ppm, Organic, 1 mL=1 mg C, Potassium Hydrogen Phthalate-Water, Traceable to NIST, 500 mL Poly Bottle, LC129101, (Non-Regulated)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/ceric-ammonium-sulfate-0-10-n-0-10-m-in-1-0-n-sulfuric-acid-4-l-amber-glass-bottle-labchem-lc129304</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIC-12930-4.png?v=1786101226</image:loc>
      <image:title>Ceric Ammonium Sulfate, 0.10 N (0.10 M) in 1.0 N Sulfuric Acid, 4 L Amber Glass Bottle, Labchem, LC129304</image:title>
      <image:caption>Ceric Ammonium Sulfate, 0.10 N (0.10 M) in 1.0 N Sulfuric Acid, 4 L Amber Glass Bottle, Labchem, LC129304</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/chloride-standard-1000-ppm-1-ml-1-mg-cl-0-0282-n-nacl-in-water-500-ml-labchem-lc130001</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIC-13000-1.png?v=1786101227</image:loc>
      <image:title>Chloride Standard, 1000 ppm (1 mL = 1 mg Cl-) (0.0282 N) (NaCl in Water), 500 mL, LabChem, LC130001</image:title>
      <image:caption>Chloride Standard, 1000 ppm (1 mL = 1 mg Cl-) (0.0282 N) (NaCl in Water), 500 mL, LabChem, LC130001</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/chloride-standard-500-ppm-0-0141-n-0-0141-m-1-ml-0-5-mg-cl-sodium-chloride-water-traceable-to-nist-1-l-poly-bottle-lc130102-non-regulated</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIC-13010-2.png?v=1786101229</image:loc>
      <image:title>Chloride Standard, 500 ppm, 0.0141 N (0.0141 M), 1 mL-0.5 mg Cl, Sodium Chloride-Water, Traceable to NIST, 1 L Poly Bottle, LC130102 (Non-Regulated)</image:title>
      <image:caption>Chloride Standard, 500 ppm, 0.0141 N (0.0141 M), 1 mL-0.5 mg Cl, Sodium Chloride-Water, Traceable to NIST, 1 L Poly Bottle, LC130102 (Non-Regulated)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/chromium-aa-standard-1000-ppm-1-ml-1-mg-cr-potassium-dichromate-water-traceable-to-nist-500-ml-poly-bottle-non-regulated</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIC-13120-1_5c9c620f-3e57-4ad5-90b1-ef10215746dc.png?v=1786101231</image:loc>
      <image:title>Chromium AA Standard, 1000 ppm, 1 mL=1 mg Cr, Potassium Dichromate-water, Traceable to NIST, 500 mL Poly Bottle, (Non-Regulated)</image:title>
      <image:caption>Chromium AA Standard, 1000 ppm, 1 mL=1 mg Cr, Potassium Dichromate-water, Traceable to NIST, 500 mL Poly Bottle, (Non-Regulated)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/cobalt-aa-standard-1000-ppm-1-ml-1-mg-co-cobalt-nitrate-dilute-nitric-acid-traceable-to-nist-500-ml-poly-bottle-non-regulated</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIC-13230-1_c1dcf17b-800a-4b89-9098-e0b93efead43.png?v=1787628916</image:loc>
      <image:title>Cobalt AA Standard, 1000 ppm, 1 mL=1 mg Co, Cobalt Nitrate-dilute nitric acid, Traceable to NIST, 500 mL Poly Bottle, (Non-Regulated)</image:title>
      <image:caption>Cobalt AA Standard, 1000 ppm, 1 mL=1 mg Co, Cobalt Nitrate-dilute nitric acid, Traceable to NIST, 500 mL Poly Bottle, (Non-Regulated)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/cod-standard-300-ppm-1-ml-0-3-mg-cod-potassium-acid-phthalate-in-water-500-ml-poly-bottle-labchem-lc132401</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIC-13240-1.png?v=1786101235</image:loc>
      <image:title>COD Standard, 300 ppm (1 mL = 0.3 mg COD) (Potassium Acid Phthalate in Water), 500 mL Poly Bottle, Labchem, LC132401</image:title>
      <image:caption>COD Standard, 300 ppm (1 mL = 0.3 mg COD) (Potassium Acid Phthalate in Water), 500 mL Poly Bottle, Labchem, LC132401</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/cod-standard-1-000-ppm-1-ml-1-mg-potassium-acid-phthalate-in-water-500-ml-poly-bottle-labchem-lc132451</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIC-13245-1.png?v=1786101236</image:loc>
      <image:title>COD Standard, 1,000 ppm, (1 mL = 1 mg), (Potassium Acid Phthalate in Water), 500 mL Poly Bottle, LabChem, LC132451</image:title>
      <image:caption>COD Standard, 1,000 ppm, (1 mL = 1 mg), (Potassium Acid Phthalate in Water), 500 mL Poly Bottle, LabChem, LC132451</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/copper-aa-standard-1000-ppm-1-ml-1-mg-cu-500-ml-poly-bottle-labchem-lc134001</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIC-13400-1.png?v=1787628918</image:loc>
      <image:title>Copper AA Standard, 1000 ppm (1 mL = 1 mg Cu), 500 mL Poly Bottle, Labchem, LC134001</image:title>
      <image:caption>Copper AA Standard, 1000 ppm (1 mL = 1 mg Cu), 500 mL Poly Bottle, Labchem, LC134001</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/copper-sulfate-10-w-v-4-l-poly-bottle-labchem-lc134404</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIC-13440-4_7e39cce2-6381-4387-90ad-8e0c6ca00cc2.png?v=1786101240</image:loc>
      <image:title>Copper Sulfate, 10% w/v, 4 L Poly Bottle, Labchem, LC134404</image:title>
      <image:caption>Copper Sulfate, 10% w/v, 4 L Poly Bottle, Labchem, LC134404</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/cyanide-standard-1-000-ppm-125-ml-poly-bottle-lc135457-non-regulated</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIC-13545-7_0a0050eb-bc67-47d2-bcf0-0d82b577fd32.png?v=1787110550</image:loc>
      <image:title>Cyanide Standard, 1,000 ppm, 125 mL Poly Bottle, LC135457 (Non-Regulated)</image:title>
      <image:caption>Cyanide Standard, 1,000 ppm, 125 mL Poly Bottle, LC135457 (Non-Regulated)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/conductivity-standard-500-umho-cm-potassium-chloride-water-traceable-to-nist-1-l-poly-bottle-lc187602-non-regulated</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIC-18760-2.png?v=1786101243</image:loc>
      <image:title>Conductivity Standard, 500 umho/cm, Potassium Chloride-Water, Traceable to NIST, 1 L Poly Bottle, LC187602 (Non-Regulated)</image:title>
      <image:caption>Conductivity Standard, 500 umho/cm, Potassium Chloride-Water, Traceable to NIST, 1 L Poly Bottle, LC187602 (Non-Regulated)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/conductivity-standard-717-umho-cm-1-l-poly-bottle-lc187652-non-regulated</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIC-18765-2.png?v=1786101246</image:loc>
      <image:title>Conductivity Standard, 717 umho/cm, 1 L Poly Bottle, LC187652 (Non-Regulated)</image:title>
      <image:caption>Conductivity Standard, 717 umho/cm, 1 L Poly Bottle, LC187652 (Non-Regulated)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/conductivity-standard-1000-umho-cm-potassium-chloride-water-traceable-to-nist-1-l-poly-bottle-lc187712-non-regulated</loc>
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      <image:caption>Conductivity Standard, 1409 umho/cm, Potassium Chloride-water, Traceable to NIST, 10 L Cubitainer, LC187806, (Non-Regulated)</image:caption>
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  <url>
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      <image:caption>Water Hardness Buffer, with Magnesium, 500 mL Poly Bottle,  LC268101 (8, UN2672, P.G. III)</image:caption>
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  <url>
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  <url>
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  <url>
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      <image:caption>Distilled Water, 1 gallon (Non-Regulated)</image:caption>
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    </image:image>
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      <image:caption>EDTA, 0.1 M (0.2 N) (Sold by Each / Each = Poly Bottle of 4 L),  Traceable to NIST  (Non-Regulated)</image:caption>
    </image:image>
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      <image:caption>EDTA, 0.1 M (0.2 N), 20 L Cubitainer, Traceable to NIST  (Non-Regulated), LC139002</image:caption>
    </image:image>
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  <url>
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      <image:caption>Electrode Storage Solution (Sold by Each / Each = Poly Bottle of 500 mL) (Non-Regulated)</image:caption>
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      <image:caption>Electrode Storage Solution, 4 L Poly Bottle, LC140204 (Non-Regulated)</image:caption>
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      <image:caption>Eriochrome Black T, Dry Form in NaCl (Sold by Each / Each = Poly Bottle of 500 Grams) (Non-Regulated)</image:caption>
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      <image:caption>Eriochrome Black T, Dry Form in NaCl, 100 g Poly Bottle, LC140509 (Non-Regulated)</image:caption>
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      <image:caption>Ferric Chloride Solution, for Sulfide (100 g in 40 mL water), 500 mL Poly Bottle, LC143801(8, UN2582, P.G. III)</image:caption>
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      <image:caption>Ferroin Oxidation-Reduction Indicator, 0.025 M, 500 mL Amber Glass Bottle, LC144501 (Non-Regulated)</image:caption>
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      <image:caption>Formaldehyde, 10% v/v, Buffered (Formalin), 20 L, Cubitainer, Labchem, LC146705</image:caption>
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      <image:caption>Dye, Bright Standard Blue Water Tracer Liquid, 1 gal,</image:caption>
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      <image:caption>Dye, Water Tracer, Bright Standard Blue Powder, 1 lb EA, 105002</image:caption>
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  <url>
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      <image:caption>Dye, Bright Fluorescent FWT Red 50, Water Tracer, 1 gal, 106053-01G</image:caption>
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    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
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      <image:caption>Dye, Bright Water Tracer FWT Red Powder, 1 lb, 105403</image:caption>
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    <loc>https://preiser.com/products/fluorescein-disodium-salt-dye-200-tablets-bottle-non-regulated</loc>
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    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIF-5140-01_868c3025-7cd4-43c8-ae87-4f57c6fa8b1a.png?v=1786764915</image:loc>
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      <image:caption>Fluorescein, Disodium Salt (Dye) (200 Tablets/Bottle) (Non-Regulated)</image:caption>
    </image:image>
  </url>
  <url>
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      <image:caption>Dye, Bright Water Tracer Fluorescent, Yellowish  Green, Use 1 pint/12,500 gal. for Strong Visual, 1 gal EA, 4/CS, Kingscote Chemicals, 106001-01G</image:caption>
    </image:image>
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  <url>
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      <image:caption>Fluorescein, Disodium Salt (Dye) (Package of 500 Grams) (Non-Regulated)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/potassium-iodide-tablets-non-regulated</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
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      <image:caption>Potassium Iodide Tablets (Non-Regulated)</image:caption>
    </image:image>
  </url>
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    <loc>https://preiser.com/products/glucose-glutamic-acid-sold-by-pack-pack-24-6-ml-amber-glass-vial-non-regulated</loc>
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      <image:caption>Glucose Glutamic Acid (Sold by Pack / Pack = 24, 6 mL Amber Glass Vial) (Non-Regulated)</image:caption>
    </image:image>
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      <image:caption>HACH ez GGA-No Pipette GGA, Single Dose BOD Standard, 20/PK, 2 mL Ampules</image:caption>
    </image:image>
  </url>
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      <image:caption>Hydrochloric Acid, 5% V/V (1+19), 4 L Poly Bottle, Traceable to NIST  (8, UN1789, P.G. II)</image:caption>
    </image:image>
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      <image:caption>Hydrochloric Acid, 50% v/v, 1+1. 500 mL Amber Glass Bottle, LC151301</image:caption>
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  <url>
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      <image:caption>Hydrochloric Acid, 50% V/V (1+1) (Sold by Each / Each = Amber Glass Bottle of 1 L),  Traceable to NIST  (8, UN1789, P.G. II)</image:caption>
    </image:image>
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      <image:caption>Hydrochloric Acid 50% v/v (1+1), 4 L Amber Glass Bottle</image:caption>
    </image:image>
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      <image:caption>Hydrochloric Acid, 0.01 N (0.01 M), 1 L Poly Bottle, LabChem, LC151502</image:caption>
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      <image:caption>Hydrochloric Acid, 0.1 N (0.1 M), 500 mL Poly Bottle, Labchem, LC152201</image:caption>
    </image:image>
  </url>
  <url>
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      <image:caption>Hydrochloric Acid, 0.1 N (0.1 M) (Sold by Each / Each = Poly Bottle of 1 L),  Traceable to NIST  (Non-Regulated)</image:caption>
    </image:image>
  </url>
  <url>
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    <changefreq>daily</changefreq>
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      <image:title>Hydrochloric Acid. 0.1 N (0.1 M), 4L Poly Bottle, Traceable to NIST (Non-Regulated)</image:title>
      <image:caption>Hydrochloric Acid. 0.1 N (0.1 M), 4L Poly Bottle, Traceable to NIST (Non-Regulated)</image:caption>
    </image:image>
  </url>
  <url>
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    <changefreq>daily</changefreq>
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    </image:image>
  </url>
  <url>
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    <image:image>
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      <image:title>Hydrochloric Acid, 0.5 N (0.5 M) (Poly Bottle of 1 L),  Traceable to NIST  (8, UN1789, P.G. II)</image:title>
      <image:caption>Hydrochloric Acid, 0.5 N (0.5 M) (Poly Bottle of 1 L),  Traceable to NIST  (8, UN1789, P.G. II)</image:caption>
    </image:image>
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    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
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      <image:caption>Hydrochloric Acid, 0.5 N (0.5 M), 4 L, LabChem, LC152804</image:caption>
    </image:image>
  </url>
  <url>
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    <changefreq>daily</changefreq>
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      <image:caption>Hydrochloric Acid, 1.0 N (1.0 M) (Sold by Each / Each = Poly Bottle of 500 mL),  Traceable to NIST  (8, UN1789, P.G. II)</image:caption>
    </image:image>
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    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIH-15300-2.png?v=1786101369</image:loc>
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      <image:caption>Hydrochloric Acid 1.0 N (1.0 M), 1 L Poly Bottle</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/hydrochloric-acid-1-0-n-1-0-m-sold-by-each-each-poly-bottle-of-4-l-traceable-to-nist-8-un1789-p-g-ii</loc>
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    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIH-15300-4_d86e07f9-9a1a-49d9-bbdd-fb24a295cb24.png?v=1786101372</image:loc>
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      <image:caption>Hydrochloric Acid, 1.0 N (1.0 M) (Sold by Each / Each = Poly Bottle of 4 L),  Traceable to NIST  (8, UN1789, P.G. II)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/hydrochloric-acid-1-0-n-1-0-m-20-l-cubitainer</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIH-15300-5.png?v=1787110566</image:loc>
      <image:title>Hydrochloric Acid, 1.0 N (1.0 M), 20 L Cubitainer</image:title>
      <image:caption>Hydrochloric Acid, 1.0 N (1.0 M), 20 L Cubitainer</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/labchem-hydrochloric-acid-2-0-n-2-0-m-4-l-traceable-to-nist-lc153204</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIH-15320-4.png?v=1786101375</image:loc>
      <image:title>LabChem Hydrochloric Acid, 2.0 N (2.0 M), 4 L, Traceable to NIST, LC153204</image:title>
      <image:caption>LabChem Hydrochloric Acid, 2.0 N (2.0 M), 4 L, Traceable to NIST, LC153204</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/labchem-hydrochloric-acid-2-0-n-2-0-m-20-l-cubitainer-traceable-to-nist-lc153205</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIH-15320-5_5ecdd6bc-ee68-4c74-948a-1f6c88ff64b5.png?v=1786101378</image:loc>
      <image:title>LabChem Hydrochloric Acid, 2.0 N (2.0 M), 20 L Cubitainer, Traceable to NIST, LC153205</image:title>
      <image:caption>LabChem Hydrochloric Acid, 2.0 N (2.0 M), 20 L Cubitainer, Traceable to NIST, LC153205</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/hydrogen-peroxide-30-w-w-1-l-poly-bottle-labchem-lc154302</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
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      <image:caption>Hydrogen Peroxide 30% w/w, 1 L Poly Bottle, Labchem, LC154302</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/hydrogen-peroxide-3-500-ml-poly-bottle-lc154501-non-regulated</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
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      <image:caption>Hydrogen Peroxide, 3%, 500 mL Poly Bottle, LC154501 (Non-Regulated)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/hydroxylamine-hydrochloride-10-w-v-for-iron-copper-metals-500-ml-labchem-lc155301</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIH-15530-1.png?v=1786101383</image:loc>
      <image:title>Hydroxylamine Hydrochloride, 10%, w/v, for Iron, Copper, Metals, 500 mL, LabChem, LC155301</image:title>
      <image:caption>Hydroxylamine Hydrochloride, 10%, w/v, for Iron, Copper, Metals, 500 mL, LabChem, LC155301</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/heptane-reagent-grade-55-gal-drum-g-j-chemical-175130-0355</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIH-175130-55.png?v=1786101385</image:loc>
      <image:title>Heptane, Reagent Grade, 55 gal Drum, G.J. Chemical, 175130-0355</image:title>
      <image:caption>Heptane, Reagent Grade, 55 gal Drum, G.J. Chemical, 175130-0355</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/starch-indicator-0-5-preserved-with-salicylic-acid-4-l-poly-bottle-lc253004-non-regulated</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIH-25300-4_acdc6e56-f876-457f-8bbd-4718fc33d052.png?v=1786101387</image:loc>
      <image:title>Starch Indicator, 0.5%, Preserved with Salicylic Acid, 4 L Poly Bottle, LC253004 (Non-Regulated)</image:title>
      <image:caption>Starch Indicator, 0.5%, Preserved with Salicylic Acid, 4 L Poly Bottle, LC253004 (Non-Regulated)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/hydrochloric-acid-0-5-n-0-5m-sold-by-each-each-cubitainer-of-20-l-traceable-to-nist-8-un1789-p-g-ii</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIH-6102-20LT_c56fbe2d-cf2c-45f0-849f-598a27bc0728.png?v=1786101389</image:loc>
      <image:title>Hydrochloric Acid, 0.5 N (0.5M) (Sold by Each / Each = Cubitainer of 20 L),  Traceable to NIST  (8, UN1789, P.G. II)</image:title>
      <image:caption>Hydrochloric Acid, 0.5 N (0.5M) (Sold by Each / Each = Cubitainer of 20 L),  Traceable to NIST  (8, UN1789, P.G. II)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/hydrogen-peroxide-7-468-lb-drum-brenntag-925671</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIH-925671.png?v=1786101391</image:loc>
      <image:title>Hydrogen Peroxide 7%, 468 lb Drum, Brenntag 925671</image:title>
      <image:caption>Hydrogen Peroxide 7%, 468 lb Drum, Brenntag 925671</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/indicator-solution-for-cyanide-125-ml-bottle-lc155857-3-un1090-p-g-ii</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PII-15585-7.png?v=1786101393</image:loc>
      <image:title>Indicator Solution, for Cyanide, 125 mL Bottle, LC155857 (3, UN1090, P.G. II)</image:title>
      <image:caption>Indicator Solution, for Cyanide, 125 mL Bottle, LC155857 (3, UN1090, P.G. II)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/iodine-0-025-n-0-0125-m-4-l-labchem-lc156204</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
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      <image:title>Iodine, 0.025 N (0.0125 M), 4 L, LabChem, LC156204</image:title>
      <image:caption>Iodine, 0.025 N (0.0125 M), 4 L, LabChem, LC156204</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/iodine-0-0282n-0-0141m-for-chlorine-chlorine-dioxide-analysis-1-l-amber-glass-bottle-labchem-lc156302</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
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      <image:title>Iodine, 0.0282N (0.0141M), for Chlorine, Chlorine Dioxide Analysis, 1 L Amber Glass Bottle, Labchem, LC156302</image:title>
      <image:caption>Iodine, 0.0282N (0.0141M), for Chlorine, Chlorine Dioxide Analysis, 1 L Amber Glass Bottle, Labchem, LC156302</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/iodine-0-1-n-0-05-m-500-ml-labchem-lc156601</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
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      <image:title>Iodine, 0.1 N (0.05 M), 500 mL, LabChem, LC156601</image:title>
      <image:caption>Iodine, 0.1 N (0.05 M), 500 mL, LabChem, LC156601</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/iodine-0-1-n-0-5-m-sold-by-each-each-amber-glass-bottle-of-1-l-traceable-to-nist-non-regulated</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PII-15660-2_52692927-e478-49cf-a095-2d78459a371c.png?v=1787369794</image:loc>
      <image:title>Iodine, 0.1 N (0.5 M) (Sold by Each / Each = Amber Glass Bottle of 1 L),  Traceable to NIST  (Non-Regulated)</image:title>
      <image:caption>Iodine, 0.1 N (0.5 M) (Sold by Each / Each = Amber Glass Bottle of 1 L),  Traceable to NIST  (Non-Regulated)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/iodine-0-1-n-0-05-m-4-l-amber-glass-bottle-traceable-to-nist-lc156604-non-regulated</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PII-15660-4_0d77c4d9-b905-4e2c-ba38-a40f13f07e5d.png?v=1786101402</image:loc>
      <image:title>Iodine, 0.1 N (0.05 M),  4 L Amber Glass Bottle, Traceable to NIST, LC156604 (Non-Regulated)</image:title>
      <image:caption>Iodine, 0.1 N (0.05 M),  4 L Amber Glass Bottle, Traceable to NIST, LC156604 (Non-Regulated)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/iodine-1-0-n-0-5-m-12-7-500-ml-amber-glass-bottle-lc156611-non-regulated</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PII-15661-1.png?v=1786101403</image:loc>
      <image:title>Iodine, 1.0 N (0.5 M, 12.7%), 500 mL Amber Glass Bottle, LC156611 (Non-Regulated)</image:title>
      <image:caption>Iodine, 1.0 N (0.5 M, 12.7%), 500 mL Amber Glass Bottle, LC156611 (Non-Regulated)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/iron-aa-standard-1000-ppm-1-ml-1-mg-fe-ferric-nitrate-dilute-nitric-acid-traceable-to-nist-500-ml-poly-bottle-8-un3264-p-g-ii</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PII-15700-1.png?v=1786101406</image:loc>
      <image:title>Iron AA Standard, 1000 ppm, 1 mL=1 mg Fe, Ferric nitrate-dilute nitric acid, Traceable to NIST, 500 mL Poly Bottle, (8, UN3264, P.G. II)</image:title>
      <image:caption>Iron AA Standard, 1000 ppm, 1 mL=1 mg Fe, Ferric nitrate-dilute nitric acid, Traceable to NIST, 500 mL Poly Bottle, (8, UN3264, P.G. II)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/isopropyl-alcohol-70-v-v-made-from-acs-grade-500-ml-poly-bottle-labchem-lc157601</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PII-15760-1_c05ad435-e4c0-442c-af49-bf2f72193513.png?v=1786101407</image:loc>
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      <image:caption>Isopropyl Alcohol, 70% v/v (Made from ACS Grade), 500 mL Poly Bottle, LabChem, LC157601</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/isopropyl-alcohol-70-v-v-made-from-acs-grade-4-l-poly-bottle-labchem-lc157604</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PII-15760-4.png?v=1786101409</image:loc>
      <image:title>Isopropyl Alcohol, 70% v/v (Made from ACS Grade), 4 L Poly Bottle, LabChem, LC157604</image:title>
      <image:caption>Isopropyl Alcohol, 70% v/v (Made from ACS Grade), 4 L Poly Bottle, LabChem, LC157604</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/indicator-solution-universal-bogens-in-alcohol-1-l-amber-poly-bottle-3-un1987-p-g-ii</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PII-26500-2_f5254799-36ec-4faa-96ef-0d4e84418032.png?v=1786101411</image:loc>
      <image:title>Indicator Solution, Universal, Bogens in Alcohol, 1 L Amber Poly Bottle, (3, UN1987, P.G. II)</image:title>
      <image:caption>Indicator Solution, Universal, Bogens in Alcohol, 1 L Amber Poly Bottle, (3, UN1987, P.G. II)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/isopropyl-alcohol-99-technical-grade-1-gal-23400</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PII-6380-52_459258b5-1fc0-4d97-bc4c-afbf816a5677.png?v=1787283441</image:loc>
      <image:title>Isopropyl Alcohol, 99%, Technical Grade, 1 gal, 23400</image:title>
      <image:caption>Isopropyl Alcohol, 99%, Technical Grade, 1 gal, 23400</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/isopropyl-alcohol-99-acs-grade-1-gal-183910-0201</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PII-6381-52.png?v=1787783641</image:loc>
      <image:title>Isopropyl Alcohol 99% ACS Grade, 1 gal, 183910-0201</image:title>
      <image:caption>Isopropyl Alcohol 99% ACS Grade, 1 gal, 183910-0201</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/isopropyl-alcohol-99-acs-grade-5-gal-183910-0206</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PII-6381-55.png?v=1786101417</image:loc>
      <image:title>Isopropyl Alcohol 99% ACS Grade, 5 gal, 183910-0206</image:title>
      <image:caption>Isopropyl Alcohol 99% ACS Grade, 5 gal, 183910-0206</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/lead-aa-standard-1000-ppm-1-ml-1-mg-pb-500-ml-poly-bottle-labchem-lc161301</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIL-16130-1.png?v=1786101420</image:loc>
      <image:title>Lead AA Standard, 1000 ppm (1 mL = 1 mg Pb), 500 mL Poly Bottle, Labchem, LC161301</image:title>
      <image:caption>Lead AA Standard, 1000 ppm (1 mL = 1 mg Pb), 500 mL Poly Bottle, Labchem, LC161301</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/linear-alkylbenzene-sulfonate-las-solution-1-ml-1-mg-125-ml-poly-bottle-lc161507-non-regulated</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIL-16150-7.png?v=1787715379</image:loc>
      <image:title>Linear Alkylbenzene Sulfonate (LAS Solution), (1 mL = 1 mg), 125 mL Poly Bottle, LC161507 (Non-Regulated)</image:title>
      <image:caption>Linear Alkylbenzene Sulfonate (LAS Solution), (1 mL = 1 mg), 125 mL Poly Bottle, LC161507 (Non-Regulated)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/magnesium-edta-0-02-1-l-poly-bottle-lc164502-non-regulated</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIM-16450-2_e3b302af-474b-440b-bdc5-fdc9a8024e45.png?v=1786101425</image:loc>
      <image:title>Magnesium EDTA, 0.02%, 1 L Poly Bottle, LC164502 (Non-Regulated)</image:title>
      <image:caption>Magnesium EDTA, 0.02%, 1 L Poly Bottle, LC164502 (Non-Regulated)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/magnesium-sulfate-2-25-sold-by-each-each-500-m-l-poly-bottle-non-regulated</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIM-16500-1_8aa9a31e-b70f-4f52-9417-c3df4f6aa3b8.png?v=1786101428</image:loc>
      <image:title>Magnesium Sulfate, 2.25% (Sold by Each / Each = 500 m L Poly Bottle) (Non-Regulated)</image:title>
      <image:caption>Magnesium Sulfate, 2.25% (Sold by Each / Each = 500 m L Poly Bottle) (Non-Regulated)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/magnesium-sulfate-2-25-sold-by-each-each-1-l-poly-bottle-non-regulated</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
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    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIM-16500-2_6051e0dd-8ad4-4ded-806f-464979d7e173.png?v=1787283443</image:loc>
      <image:title>Magnesium Sulfate, 2.25% (Sold by Each / Each = 1 L Poly Bottle) (Non-Regulated)</image:title>
      <image:caption>Magnesium Sulfate, 2.25% (Sold by Each / Each = 1 L Poly Bottle) (Non-Regulated)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/manganous-sulfate-solution-apha-for-dissolved-oxygen-1-l-poly-bottle-lc165702-non-regulated</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIM-16570-2.png?v=1786101432</image:loc>
      <image:title>Manganous Sulfate Solution, APHA, for Dissolved Oxygen, 1 L Poly Bottle, LC165702 (Non-Regulated)</image:title>
      <image:caption>Manganous Sulfate Solution, APHA, for Dissolved Oxygen, 1 L Poly Bottle, LC165702 (Non-Regulated)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/mercuric-nitrate-0-0141n-0-0071-m-1-ml-0-5-mg-cl-for-chloride-1-l-labchem-lc166502</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIM-16650-2.png?v=1787024083</image:loc>
      <image:title>Mercuric Nitrate, 0.0141N (0.0071 M) (1 mL = 0.5 mg CL-), for Chloride, 1 L, LabChem, LC166502</image:title>
      <image:caption>Mercuric Nitrate, 0.0141N (0.0071 M) (1 mL = 0.5 mg CL-), for Chloride, 1 L, LabChem, LC166502</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/mercuric-nitrate-0-141-n-0-071-m-1-ml-5-mg-cl-4-l-amber-glass-bottle-lc166604-non-regulated</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIM-16660-4.png?v=1786101436</image:loc>
      <image:title>Mercuric Nitrate, 0.141 N (0.071 M), 1 mL = 5 mg Cl-, 4 L Amber Glass Bottle, LC166604 (Non-Regulated)</image:title>
      <image:caption>Mercuric Nitrate, 0.141 N (0.071 M), 1 mL = 5 mg Cl-, 4 L Amber Glass Bottle, LC166604 (Non-Regulated)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/mercuric-thiocyanate-chloride-0-42-w-v-in-methanol-500-ml-amber-glass-bottle-lc167201-3-un1993-p-g-ii</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIM-16720-1_9bc34eea-15af-46be-a4b2-684798526631.png?v=1786101438</image:loc>
      <image:title>Mercuric Thiocyanate (Chloride), 0.42% w/v in Methanol, 500 mL Amber Glass Bottle, LC167201 (3, UN1993, P.G. II)</image:title>
      <image:caption>Mercuric Thiocyanate (Chloride), 0.42% w/v in Methanol, 500 mL Amber Glass Bottle, LC167201 (3, UN1993, P.G. II)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/mercury-aa-standard-1000-ppm-1-ml-1-mg-hg-125-ml-poly-bottle-labchem-lc167507</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIM-16750-7_2f47732c-c462-42c6-b733-cf22a3324ce4.png?v=1786101440</image:loc>
      <image:title>Mercury AA Standard, 1000 ppm (1 mL = 1 mg Hg), 125 mL Poly Bottle, Labchem, LC167507</image:title>
      <image:caption>Mercury AA Standard, 1000 ppm (1 mL = 1 mg Hg), 125 mL Poly Bottle, Labchem, LC167507</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/methylene-blue-reagent-for-surfactants-1-l-poly-bottle-labchem-lc169702</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIM-16970-2.png?v=1786101442</image:loc>
      <image:title>Methylene Blue Reagent for Surfactants, 1 L Poly Bottle, Labchem,  LC169702</image:title>
      <image:caption>Methylene Blue Reagent for Surfactants, 1 L Poly Bottle, Labchem,  LC169702</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/methyl-orange-0-05-aqueous-ph-3-2-4-4-red-to-yellow-500-ml-poly-bottle-lc170001-non-regulated</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIM-17000-1.png?v=1786101444</image:loc>
      <image:title>Methyl Orange, 0.05% Aqueous, pH 3.2 - 4.4 Red to Yellow, 500 mL Poly Bottle, LC170001 (Non-Regulated)</image:title>
      <image:caption>Methyl Orange, 0.05% Aqueous, pH 3.2 - 4.4 Red to Yellow, 500 mL Poly Bottle, LC170001 (Non-Regulated)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/methyl-orange-0-1-aqueous-ph-3-2-to-4-4-red-to-yellow-500-ml-poly-bottle-lc170101-non-regulated</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIM-17010-1.png?v=1786101446</image:loc>
      <image:title>Methyl Orange, 0.1% Aqueous, pH 3.2 to 4.4, Red to Yellow, 500 mL Poly Bottle, LC170101 (Non-Regulated)</image:title>
      <image:caption>Methyl Orange, 0.1% Aqueous, pH 3.2 to 4.4, Red to Yellow, 500 mL Poly Bottle, LC170101 (Non-Regulated)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/methyl-red-0-02-aqueous-ph-4-2-to-6-2-pink-to-yellow-500-ml-labchem-lc170901</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIM-17090-1.png?v=1786101447</image:loc>
      <image:title>Methyl Red, 0.02% Aqueous, pH 4.2 to 6.2 Pink to Yellow, 500 mL, LabChem, LC170901</image:title>
      <image:caption>Methyl Red, 0.02% Aqueous, pH 4.2 to 6.2 Pink to Yellow, 500 mL, LabChem, LC170901</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/methyl-red-0-1-aqueous-ph-4-2-6-3-pink-to-yellow-500-ml-labchem-lc171201</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIM-17120-1.png?v=1786101449</image:loc>
      <image:title>Methyl Red, 0.1% Aqueous, pH 4.2 - 6.3 Pink to Yellow, 500 mL, Labchem, LC171201</image:title>
      <image:caption>Methyl Red, 0.1% Aqueous, pH 4.2 - 6.3 Pink to Yellow, 500 mL, Labchem, LC171201</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/methyl-red-methylene-blue-mixed-indicator-for-nitrogen-ammonia-nitrogen-organic-500-ml-plastic-bottle-labchem-lc171701</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIM-17170-1_68bdcc31-31e5-474e-b220-c61b57bc209d.png?v=1786101451</image:loc>
      <image:title>Methyl Red-Methylene Blue, Mixed Indicator, for Nitrogen (Ammonia), Nitrogen (Organic), 500 mL Plastic Bottle, Labchem, LC171701</image:title>
      <image:caption>Methyl Red-Methylene Blue, Mixed Indicator, for Nitrogen (Ammonia), Nitrogen (Organic), 500 mL Plastic Bottle, Labchem, LC171701</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/methyl-red-methylene-blue-mixed-indicator-for-nitrogen-ammonia-nitrogen-organic-125-ml-poly-bottle-labchem-lc171707</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIM-17170-7.png?v=1786101453</image:loc>
      <image:title>Methyl Red-Methylene Blue, Mixed Indicator, for Nitrogen (Ammonia), Nitrogen (Organic), 125 mL Poly Bottle, Labchem, LC171707</image:title>
      <image:caption>Methyl Red-Methylene Blue, Mixed Indicator, for Nitrogen (Ammonia), Nitrogen (Organic), 125 mL Poly Bottle, Labchem, LC171707</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/murexide-indicator-0-15-in-ethylene-glycol-for-calcium-500-ml-amber-glass-bottle-lc175001-non-regulated</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIM-17500-1.png?v=1786101455</image:loc>
      <image:title>Murexide Indicator, 0.15% in Ethylene Glycol for Calcium, 500 mL Amber Glass Bottle, LC175001 (Non-Regulated)</image:title>
      <image:caption>Murexide Indicator, 0.15% in Ethylene Glycol for Calcium, 500 mL Amber Glass Bottle, LC175001 (Non-Regulated)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/murexide-indicator-0-15-in-ethylene-glycol-for-calcium-125-ml-amber-glass-bottle-labchem-lc175007</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIM-17500-7_eabb31bb-2bf8-476e-80e1-4f94d15fee90.png?v=1786101457</image:loc>
      <image:title>Murexide Indicator, 0.15% in Ethylene Glycol, for Calcium, 125 mL Amber Glass Bottle, Labchem, LC175007</image:title>
      <image:caption>Murexide Indicator, 0.15% in Ethylene Glycol, for Calcium, 125 mL Amber Glass Bottle, Labchem, LC175007</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/murexide-indicator-dry-in-nacl-sold-by-each-each-500-grams-non-regulated</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIM-17510-1.png?v=1786101459</image:loc>
      <image:title>Murexide Indicator, Dry in NaCl (Sold by Each / Each = 500 Grams) (Non-Regulated)</image:title>
      <image:caption>Murexide Indicator, Dry in NaCl (Sold by Each / Each = 500 Grams) (Non-Regulated)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/murexide-indicator-dry-in-nacl-sold-by-each-each-100-grams-non-regulated</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIM-17510-9.png?v=1786101461</image:loc>
      <image:title>Murexide Indicator, Dry in NaCl (Sold by Each / Each = 100 Grams) (Non-Regulated)</image:title>
      <image:caption>Murexide Indicator, Dry in NaCl (Sold by Each / Each = 100 Grams) (Non-Regulated)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/methanol-technical-grade-1-gallon-or-55-gallons-interstate-chemical-company-24900-55p</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIM-7000-52_0a583d59-e6dd-47d7-a940-130ebe2b9dbd.png?v=1787197004</image:loc>
      <image:title>Methanol, Technical Grade, 1 gallon or 55 gallons, Interstate Chemical Company, 24900-55P</image:title>
      <image:caption>Methanol, Technical Grade, 1 gallon or 55 gallons, Interstate Chemical Company, 24900-55P</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/nesslers-reagent-for-nitrogen-ammonia-for-nitrogen-organic-500-ml-amber-glass-bottle-8-un2922-p-g-ii</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIN-17600-1_025674b1-e67c-4b9d-abce-6a4c2b9c1353.png?v=1786101465</image:loc>
      <image:title>Nesslers Reagent, for Nitrogen (Ammonia), for Nitrogen (Organic), 500 mL Amber Glass Bottle, (8, UN2922, P.G. II)</image:title>
      <image:caption>Nesslers Reagent, for Nitrogen (Ammonia), for Nitrogen (Organic), 500 mL Amber Glass Bottle, (8, UN2922, P.G. II)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/nickel-aa-standard-1000-ppm-1-ml-1-mg-ni-nickel-nitrate-dilute-nitric-acid-traceable-to-nist-500-ml-poly-bottle-lc176701-8-un3264-p-g-ii</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIN-17670-1.png?v=1786101466</image:loc>
      <image:title>Nickel AA Standard, 1000 ppm, 1 mL=1 mg Ni, Nickel Nitrate-Dilute Nitric Acid, Traceable to NIST, 500 ML Poly Bottle, LC176701 (8, UN3264, P.G. II)</image:title>
      <image:caption>Nickel AA Standard, 1000 ppm, 1 mL=1 mg Ni, Nickel Nitrate-Dilute Nitric Acid, Traceable to NIST, 500 ML Poly Bottle, LC176701 (8, UN3264, P.G. II)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/nickel-aa-standard-1000-ppm-1-ml-1-mg-ni-125-ml-poly-bottle-labchem-lc176707</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIN-17670-7_d92ea25e-c9d7-4561-a62d-5d5fd3ef63c1.png?v=1786101468</image:loc>
      <image:title>Nickel AA Standard, 1000 ppm (1 mL = 1 mg Ni), 125 mL Poly Bottle, Labchem, LC176707</image:title>
      <image:caption>Nickel AA Standard, 1000 ppm (1 mL = 1 mg Ni), 125 mL Poly Bottle, Labchem, LC176707</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/nitric-acid-10-v-v-sold-by-each-each-amber-glass-bottle-of-1-l-8-un2031-p-g-ii</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIN-17730-2.png?v=1786101470</image:loc>
      <image:title>Nitric Acid, 10% V/V (Sold by Each / Each = Amber Glass Bottle of 1 L) (8, UN2031, P.G. II)</image:title>
      <image:caption>Nitric Acid, 10% V/V (Sold by Each / Each = Amber Glass Bottle of 1 L) (8, UN2031, P.G. II)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/nitric-acid-50-sold-by-each-each-amber-glass-bottle-of-1-l-8-un2031-p-g-ii</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIN-17770-2_6e9b720e-e25d-4565-811c-2bcb41ddfcdb.png?v=1786101472</image:loc>
      <image:title>Nitric Acid, 50% (Sold by Each / Each = Amber Glass Bottle of 1 L) (8, UN2031, P.G. II)</image:title>
      <image:caption>Nitric Acid, 50% (Sold by Each / Each = Amber Glass Bottle of 1 L) (8, UN2031, P.G. II)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/nitric-acid-50-v-v-1-1-sold-by-each-each-glass-bottle-of-2-5-l-traceable-to-nist-8-un2031-p-g-ii</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIN-17770-3.png?v=1786101474</image:loc>
      <image:title>Nitric Acid, 50% V/V (1+1) (Sold by Each / Each = Glass Bottle of 2.5 L),  Traceable to NIST  (8, UN2031, P.G. II)</image:title>
      <image:caption>Nitric Acid, 50% V/V (1+1) (Sold by Each / Each = Glass Bottle of 2.5 L),  Traceable to NIST  (8, UN2031, P.G. II)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/nitric-acid-0-1-n-0-1-m-sold-by-each-each-poly-bottle-of-500-ml-traceable-to-nist-non-regulated</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIN-17800-1_2f132428-5230-46f1-8a72-e6f6d0caee5d.png?v=1786419216</image:loc>
      <image:title>Nitric Acid, 0.1 N (0.1 M) (Sold by Each / Each = Poly Bottle of 500 mL),  Traceable to NIST  (Non-Regulated)</image:title>
      <image:caption>Nitric Acid, 0.1 N (0.1 M) (Sold by Each / Each = Poly Bottle of 500 mL),  Traceable to NIST  (Non-Regulated)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/nitric-acid-1-0-n-1-0-m-500-ml-amber-glass-bottle-labchem-lc178401</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIN-17840-1_0146b596-e339-4fb9-907d-8a4404271497.png?v=1786101478</image:loc>
      <image:title>Nitric Acid, 1.0 N (1.0 M), 500 mL Amber Glass Bottle, LabChem, LC178401</image:title>
      <image:caption>Nitric Acid, 1.0 N (1.0 M), 500 mL Amber Glass Bottle, LabChem, LC178401</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/nitrate-as-nitrogen-standard-1000-ppm-1-ml-1-mg-n-1-ml-4-43-m-no3-500-ml-labchem-lc179001</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIN-17900-1.png?v=1786101480</image:loc>
      <image:title>Nitrate (as Nitrogen) Standard, 1000 ppm, (1 mL = 1 mg N, 1 mL - 4.43 m NO3-), 500 mL, LabChem, LC179001</image:title>
      <image:caption>Nitrate (as Nitrogen) Standard, 1000 ppm, (1 mL = 1 mg N, 1 mL - 4.43 m NO3-), 500 mL, LabChem, LC179001</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/heptane-reagent-grade-5-gal-can-g-j-chemical-175130-0206</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIN-6020-55.png?v=1786101481</image:loc>
      <image:title>Heptane, Reagent Grade, 5 gal. Can, G.J. Chemical, 175130-0206</image:title>
      <image:caption>Heptane, Reagent Grade, 5 gal. Can, G.J. Chemical, 175130-0206</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/naptha-vm-p-1-gallon-up-to-55-gallon-drum-3-un1268-pg-ii</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIN-7600-52.png?v=1786101484</image:loc>
      <image:title>Naptha VM &amp; P 1 Gallon Up to 55 Gallon Drum (3, UN1268, PG II)</image:title>
      <image:caption>Naptha VM &amp; P 1 Gallon Up to 55 Gallon Drum (3, UN1268, PG II)</image:caption>
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  </url>
  <url>
    <loc>https://preiser.com/products/orp-standard-200-mv-500-ml-labchem-lc180101</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIO-18010-1_627adbe2-54e0-4509-9f41-09f88e209cad.png?v=1787110577</image:loc>
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  <url>
    <loc>https://preiser.com/products/orp-standard-400-mv-500-ml-amber-glass-bottle-labchem-lc180151</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
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      <image:caption>ORP Standard, 400 mV, 500 mL Amber Glass Bottle, Labchem, LC180151</image:caption>
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  </url>
  <url>
    <loc>https://preiser.com/products/o-tolidine-0-1-1-l-poly-bottle-lc261602-non-regulated</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIO-26160-2_49840ded-fff3-42a9-990e-b2bff528700f.png?v=1786101491</image:loc>
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      <image:caption>o-Tolidine, 0.1%, 1 L Poly Bottle, LC261602 (Non-Regulated)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/potassium-chloride-4-m-4-n-electrode-filling-solution-saturated-with-agcl-500-ml-poly-bottle-lc140001-non-regulated</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIP-14000-1_af03cf09-a54d-452f-8df7-f08051afad2b.png?v=1786101493</image:loc>
      <image:title>Potassium Chloride, 4 M (4 N), Electrode Filling Solution, Saturated with AgCl, 500 mL Poly Bottle, LC140001 (Non-Regulated)</image:title>
      <image:caption>Potassium Chloride, 4 M (4 N), Electrode Filling Solution, Saturated with AgCl, 500 mL Poly Bottle, LC140001 (Non-Regulated)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/filling-solution-potassium-chloride-4-m-4-n-saturated-with-agcl-for-ph-electrodes-125-ml-poly-bottle-lc140007</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIP-14000-7.png?v=1786101495</image:loc>
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      <image:caption>Filling Solution (Potassium Chloride) 4 M (4 N), Saturated with AgCl, for pH Electrodes, 125 mL Poly Bottle, LC140007</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/1-10-phenanthroline-0-1-aqueous-for-iron-500-ml-poly-bottle-lc181501-non-regulated</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIP-18150-1.png?v=1786101497</image:loc>
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      <image:caption>1,10-Phenanthroline, 0.1% Aqueous, for Iron,  500 mL Poly Bottle, LC181501 (Non-Regulated)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/phenolphthalein-acs-100-g-poly-bottle-labchem-lc181989-non-regulated</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIP-18198-9.png?v=1786101498</image:loc>
      <image:title>Phenolphthalein, ACS, 100 g Poly Bottle, LabChem, LC181989, (Non-Regulated)</image:title>
      <image:caption>Phenolphthalein, ACS, 100 g Poly Bottle, LabChem, LC181989, (Non-Regulated)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/phenolphthalein-0-5-in-50-ethanol-ph-8-3-10-0-colorless-to-pink-500-ml-poly-bottle-lc182001</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIP-18200-1.png?v=1786101501</image:loc>
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      <image:caption>Phenolphthalein, 0.5% In 50% Ethanol, pH 8.3 - 10.0 Colorless to Pink, 500 mL Poly Bottle, LC182001</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/phenolphthalein-0-5-in-50-ethanol-ph-8-3-10-0-colorless-to-pink-125-ml-poly-bottle-lc182007</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIP-18200-7.png?v=1786101503</image:loc>
      <image:title>Phenolphthalein, 0.5% In 50% Ethanol, pH 8.3 - 10.0 Colorless to Pink, 125 mL Poly Bottle, LC182007</image:title>
      <image:caption>Phenolphthalein, 0.5% In 50% Ethanol, pH 8.3 - 10.0 Colorless to Pink, 125 mL Poly Bottle, LC182007</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/phenolphthalein-1-in-60-isopropanol-ph-8-3-to-10-0-colorless-to-pink-125-ml-poly-bottle-lc182107-3-un1987-p-g-ii</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIP-18210-7.png?v=1786101505</image:loc>
      <image:title>Phenolphthalein, 1% in 60% Isopropanol, pH 8.3 to 10.0, Colorless to Pink, 125 mL Poly Bottle, LC182107, (3, UN1987, P.G. II)</image:title>
      <image:caption>Phenolphthalein, 1% in 60% Isopropanol, pH 8.3 to 10.0, Colorless to Pink, 125 mL Poly Bottle, LC182107, (3, UN1987, P.G. II)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/phenolphthalein-1-in-95-ethanol-ph-8-3-10-0-colorless-to-pink-500-ml-lc182201-3-un1170-p-g-iii</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIP-18220-1.png?v=1786101506</image:loc>
      <image:title>Phenolphthalein 1% in 95% Ethanol, pH 8.3 - 10.0 Colorless to Pink, 500 mL, LC182201 (3, UN1170, P.G. III)</image:title>
      <image:caption>Phenolphthalein 1% in 95% Ethanol, pH 8.3 - 10.0 Colorless to Pink, 500 mL, LC182201 (3, UN1170, P.G. III)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/phenolphthalein-1-in-95-ethanol-ph-8-3-10-0-colorless-to-pink-1-l-lc182202-3-un1987-p-g-ii</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIP-18220-2_873fb89f-89ea-4618-8b0d-6a525af0db13.png?v=1786101508</image:loc>
      <image:title>Phenolphthalein 1% in 95% Ethanol, pH 8.3 - 10.0 Colorless to Pink, 1 L, LC182202 (3, UN1987, P.G. II)</image:title>
      <image:caption>Phenolphthalein 1% in 95% Ethanol, pH 8.3 - 10.0 Colorless to Pink, 1 L, LC182202 (3, UN1987, P.G. II)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/phenolphthalein-1-in-95-ethanol-ph-8-3-10-0-colorless-to-pink-125-ml-lc182207-3-un1170-p-g-iii</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIP-18220-7.png?v=1786101510</image:loc>
      <image:title>Phenolphthalein 1% in 95% Ethanol, pH 8.3 - 10.0 Colorless to Pink, 125 mL, LC182207 (3, UN1170, P.G. III)</image:title>
      <image:caption>Phenolphthalein 1% in 95% Ethanol, pH 8.3 - 10.0 Colorless to Pink, 125 mL, LC182207 (3, UN1170, P.G. III)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/phenol-standard-1000-ppm-1-ml-1-mg-500-ml-amber-glass-bottle-labchem-lc183301</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIP-18330-1.png?v=1786101513</image:loc>
      <image:title>Phenol Standard, 1000 ppm (1 mL = 1 mg), 500 mL Amber Glass Bottle, Labchem, LC183301</image:title>
      <image:caption>Phenol Standard, 1000 ppm (1 mL = 1 mg), 500 mL Amber Glass Bottle, Labchem, LC183301</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/phenol-standard-1000-ppm-125-ml-amber-glass-bottle-lc183307-non-regulated</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIP-18330-7.png?v=1786101514</image:loc>
      <image:title>Phenol Standard, 1000 ppm, 125 mL Amber Glass Bottle, LC183307 (Non-Regulated)</image:title>
      <image:caption>Phenol Standard, 1000 ppm, 125 mL Amber Glass Bottle, LC183307 (Non-Regulated)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/phenylarsine-oxide-0-00564-n-0-00282-m-1ml-0-2mg-cl-1-liter-amber-glass-bottle-non-regulated</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIP-18360-2.png?v=1786101516</image:loc>
      <image:title>Phenylarsine Oxide, 0.00564 N (0.00282 M) (1mL = 0.2mg Cl) 1 Liter Amber Glass  Bottle, (Non-Regulated)</image:title>
      <image:caption>Phenylarsine Oxide, 0.00564 N (0.00282 M) (1mL = 0.2mg Cl) 1 Liter Amber Glass  Bottle, (Non-Regulated)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/phenylarsine-oxide-pao-0-025n-0-0125-m-1-l-amber-glass-bottle-lc183802-non-regulated</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIP-18380-2.png?v=1786101518</image:loc>
      <image:title>Phenylarsine Oxide (PAO), 0.025N (0.0125 M), 1 L Amber Glass Bottle, LC183802 (Non-Regulated)</image:title>
      <image:caption>Phenylarsine Oxide (PAO), 0.025N (0.0125 M), 1 L Amber Glass Bottle, LC183802 (Non-Regulated)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/buffer-solution-phosphate-ph-7-2-for-bod-500-ml-poly-bottle-lc185001-non-regulated</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIP-18500-1.png?v=1786101520</image:loc>
      <image:title>Buffer Solution, Phosphate, pH 7.2, for BOD, 500 mL Poly Bottle, LC185001 (Non-Regulated)</image:title>
      <image:caption>Buffer Solution, Phosphate, pH 7.2, for BOD, 500 mL Poly Bottle, LC185001 (Non-Regulated)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/phosphate-buffer-ph-7-2-1-l-poly-bottle-non-regulated-lc185002</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIP-18500-2.png?v=1787283445</image:loc>
      <image:title>Phosphate Buffer, pH 7.2, 1 L Poly Bottle, (Non-Regulated), LC185002</image:title>
      <image:caption>Phosphate Buffer, pH 7.2, 1 L Poly Bottle, (Non-Regulated), LC185002</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/phosphate-buffer-ph-6-2-6-5-for-chlorine-chlorine-dioxide-1-l-poly-bottle-labchem-lc185402</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIP-18540-2.png?v=1786101524</image:loc>
      <image:title>Phosphate Buffer pH 6.2-6.5, for Chlorine, Chlorine Dioxide, 1 L Poly Bottle, Labchem, LC185402</image:title>
      <image:caption>Phosphate Buffer pH 6.2-6.5, for Chlorine, Chlorine Dioxide, 1 L Poly Bottle, Labchem, LC185402</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/phosphate-standard-1000-ppm-1-ml-1-mg-po4-500-ml-poly-bottle-labchem-lc185701</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIP-18570-1_bceab6d1-65b2-4c2a-9b58-4444c81a9cca.png?v=1786101526</image:loc>
      <image:title>Phosphate Standard, 1000 ppm (1 mL = 1 mg PO4), 500 mL Poly Bottle, Labchem, LC185701</image:title>
      <image:caption>Phosphate Standard, 1000 ppm (1 mL = 1 mg PO4), 500 mL Poly Bottle, Labchem, LC185701</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/phosphate-as-phosphorus-standard-1000-ppm-1-ml-1-mg-p-500-ml-labchem-lc185901</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIP-18590-1_fb6f3171-c07c-4770-a2ef-e7719f86d58a.png?v=1786592187</image:loc>
      <image:title>Phosphate (as Phosphorus) Standard, 1000 ppm (1 mL = 1 mg P), 500 mL, LabChem, LC185901</image:title>
      <image:caption>Phosphate (as Phosphorus) Standard, 1000 ppm (1 mL = 1 mg P), 500 mL, LabChem, LC185901</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/potassium-antimony-tartrate-solution-for-phosphorus-500-ml-poly-bottle-lc187201-non-regulated</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIP-18720-1.png?v=1786101529</image:loc>
      <image:title>Potassium Antimony Tartrate Solution for Phosphorus, 500 mL Poly Bottle, LC187201 (Non-Regulated)</image:title>
      <image:caption>Potassium Antimony Tartrate Solution for Phosphorus, 500 mL Poly Bottle, LC187201 (Non-Regulated)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/potassium-chloride-acs-500-g-poly-bottle-lc187901-non-regulated</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIP-18790-1.png?v=1786101531</image:loc>
      <image:title>Potassium Chloride, ACS, 500 g Poly Bottle, LC187901 (Non-Regulated)</image:title>
      <image:caption>Potassium Chloride, ACS, 500 g Poly Bottle, LC187901 (Non-Regulated)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/potassium-chloride-saturated-solution-500-ml-poly-bottle-non-regulated</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIP-18800-1.png?v=1786101533</image:loc>
      <image:title>Potassium Chloride, Saturated Solution, 500 mL Poly Bottle (Non-Regulated)</image:title>
      <image:caption>Potassium Chloride, Saturated Solution, 500 mL Poly Bottle (Non-Regulated)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/potassium-chloride-saturated-electrode-filling-solution-4-m-1-l-poly-bottle-lc188002</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIP-18800-2.png?v=1786101535</image:loc>
      <image:title>Potassium Chloride Saturated, Electrode Filling Solution, 4 M, 1 L Poly Bottle, LC188002</image:title>
      <image:caption>Potassium Chloride Saturated, Electrode Filling Solution, 4 M, 1 L Poly Bottle, LC188002</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/potassium-chloride-saturated-electrode-filling-solution-125-ml-poly-bottle-lc188007-non-regulated</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIP-18800-7.png?v=1786101537</image:loc>
      <image:title>Potassium Chloride, Saturated, Electrode Filling Solution, 125 mL Poly Bottle, LC188007  (Non-Regulated)</image:title>
      <image:caption>Potassium Chloride, Saturated, Electrode Filling Solution, 125 mL Poly Bottle, LC188007  (Non-Regulated)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/potassium-chromate-indicator-5-w-v-for-chloride-500-ml-poly-bottle-lc188501-non-regulated</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIP-18850-1.png?v=1786101539</image:loc>
      <image:title>Potassium Chromate Indicator, 5% w/v, for Chloride, 500 mL Poly Bottle, LC188501 (Non-Regulated)</image:title>
      <image:caption>Potassium Chromate Indicator, 5% w/v, for Chloride, 500 mL Poly Bottle, LC188501 (Non-Regulated)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/potassium-dichromate-0-1n-0-0167m-500-ml-labchem-lc189801</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIP-18980-1.png?v=1786101541</image:loc>
      <image:title>Potassium Dichromate, 0.1N (0.0167M), 500 mL, LabChem, LC189801</image:title>
      <image:caption>Potassium Dichromate, 0.1N (0.0167M), 500 mL, LabChem, LC189801</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/potassium-dichromate-0-1n-0-0167m-1-l-poly-bottle-labchem-lc189802</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
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    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIP-18980-2.png?v=1786101543</image:loc>
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      <image:caption>Potassium Dichromate, 0.1N (0.0167M), 1 L Poly Bottle, LabChem, LC189802</image:caption>
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  </url>
  <url>
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    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
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  <url>
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    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIP-19010-5_f770f131-ffeb-4c1c-b90a-f264077a4ce3.png?v=1786101547</image:loc>
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      <image:caption>Potassium Dichromate, 0.25 N (0.0417 M),  20 L Cubitainer, LC190105 (Non-Regulated)</image:caption>
    </image:image>
  </url>
  <url>
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    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIP-19300-1_d659d658-de7c-4b0d-a082-d3b3ae34a79a.png?v=1786101549</image:loc>
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      <image:caption>Potassium Hydroxide, 0.1 N (0.1 M), 500 mL Poly Bottle, LC193001 (Non-Regulated)</image:caption>
    </image:image>
  </url>
  <url>
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    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
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      <image:caption>Potassium Hydroxide, 0.1 N (0.1 M), 1 L Poly Bottle, LC193002</image:caption>
    </image:image>
  </url>
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    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIP-19560-4.png?v=1786101553</image:loc>
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      <image:caption>Potassium Hydroxide, 0.5 N (0.5 M) in Ethanol, 4 L Amber Glass Bottle, Traceable to NIST, LC195604  (3, UN2924, P.G. II)</image:caption>
    </image:image>
  </url>
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    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIP-19660-1.png?v=1786101555</image:loc>
      <image:title>Potassium Iodate-Iodide, 0.0125 N (0.002083 M) (1mL = 0.5 mg SO3 2-), for Sulfite, 500 mL Amber Poly Bottle, Labchem, LC196601</image:title>
      <image:caption>Potassium Iodate-Iodide, 0.0125 N (0.002083 M) (1mL = 0.5 mg SO3 2-), for Sulfite, 500 mL Amber Poly Bottle, Labchem, LC196601</image:caption>
    </image:image>
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    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIP-19660-2.png?v=1786101557</image:loc>
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      <image:caption>Potassium Iodate/Iodide, 0.0125 N, (0.002083 M) (1 mL = 0.5 mg (SO3)2-, for Sulfite, 1 L Amber Poly Bottle, LC196602 (Non-Regulated)</image:caption>
    </image:image>
  </url>
  <url>
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    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIP-19660-4_34e739d3-1246-43dc-9298-5fcc542c9347.png?v=1786101559</image:loc>
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      <image:caption>Potassium Iodate-Iodide, 0.0125N (0.002083M), for Sulfide, Traceable to NIST, 4 L Poly Bottle, LC196604, (Non-Regulated)</image:caption>
    </image:image>
  </url>
  <url>
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    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIP-19690-1_3d52d4ce-051d-483b-ac38-af8a1c9e445c.png?v=1786101561</image:loc>
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      <image:caption>Potassium Iodide, ACS, 500 g Amber Glass Bottle, LC196901 (Non-Regulated)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/potassium-iodide-10-w-v-sold-by-each-each-amber-poly-bottle-of-1-l-non-regulated</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIP-19760-2_d1ddfee8-53e9-4e97-a6de-9a16544ca969.png?v=1786101563</image:loc>
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      <image:caption>Potassium Iodide, 10% w/v (Sold by Each / Each = Amber Poly Bottle of 1 L) (Non-Regulated)</image:caption>
    </image:image>
  </url>
  <url>
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    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
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      <image:caption>Potassium Iodide, 10% w/v, 4 L Amber Bottle, LabChem, PIP-19760-4</image:caption>
    </image:image>
  </url>
  <url>
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    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
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      <image:caption>Potassium Iodide, 20% w/v, 20 L Cubitainer, LabChem, LC198005</image:caption>
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  </url>
  <url>
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    <changefreq>daily</changefreq>
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      <image:caption>Potassium Permanganate, 0.05 N (0.01 M) 1 L Amber Glass Bottle, LC199602 (Non-Regulated)</image:caption>
    </image:image>
  </url>
  <url>
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    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
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      <image:title>Potassium Permanganate, 0.1 N (0.02 M), 500 mL Amber Glass Bottle, Labchem, LC199801</image:title>
      <image:caption>Potassium Permanganate, 0.1 N (0.02 M), 500 mL Amber Glass Bottle, Labchem, LC199801</image:caption>
    </image:image>
  </url>
  <url>
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    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
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      <image:caption>Potassium Permanganate, 0.1 N (0.02 M), 1 L Amber Glass Bottle, LC199802 (Non-Regulated)</image:caption>
    </image:image>
  </url>
  <url>
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    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIP-19980-4.png?v=1786101574</image:loc>
      <image:title>Potassium Permanganate, 0.1 N (0.02 M), 4 L Amber Glass Bottle, Labchem, LC199804</image:title>
      <image:caption>Potassium Permanganate, 0.1 N (0.02 M), 4 L Amber Glass Bottle, Labchem, LC199804</image:caption>
    </image:image>
  </url>
  <url>
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    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIP-20000-1.png?v=1786101576</image:loc>
      <image:title>Potassium Permanganate, 0.2 N (0.040 M), 500 mL Amber Glass Bottle, Labchem, LC200001</image:title>
      <image:caption>Potassium Permanganate, 0.2 N (0.040 M), 500 mL Amber Glass Bottle, Labchem, LC200001</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/potassium-phosphate-dibasic-acs-grade-500-g-poly-bottle-labchem-lc200901</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIP-20090-1.png?v=1786101578</image:loc>
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      <image:caption>Potassium Phosphate, Dibasic, ACS Grade, 500 g Poly Bottle, Labchem, LC200901</image:caption>
    </image:image>
  </url>
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    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIP-3343-4_df206c39-6d01-4ec4-aee0-adc21ab6445c.png?v=1786101580</image:loc>
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      <image:caption>Phenylarsine Oxide (PAO), 0.00564 N (0.00282 M)(1 mL = 0.2 mg Cl), 4 L, LabChem, LC183604</image:caption>
    </image:image>
  </url>
  <url>
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    <changefreq>daily</changefreq>
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      <image:caption>Percut, Light Liquid (Mineral Spirits &lt;1%) is a Special Chemical Used to Reduce the Specific Gravity of Perchloroethylene, (3, UN1268, P.G. III)</image:caption>
    </image:image>
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    <image:image>
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      <image:caption>Phenolphthalein, 1% in 95% Ethanol, pH 8.3 to 10.0, Colorless to Pink, 4 L Poly Bottle, LC182204 (3, UN1170, P.G. II)</image:caption>
    </image:image>
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    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIP-8679-1L.png?v=1786101596</image:loc>
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      <image:caption>Potassium Hydroxide, 0.5 N (0.5 M) in Ethanol, Traceable to NIST, 1 L Amber Glass Bottle, LC195602 (3, UN2924, P.G. II)</image:caption>
    </image:image>
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    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIP-8845-63.png?v=1786101587</image:loc>
      <image:title>Propylene Glycol, U.S.P., Multi-Compendial</image:title>
      <image:caption>Propylene Glycol, U.S.P., Multi-Compendial</image:caption>
    </image:image>
  </url>
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      <image:caption>Phosphoric Acid, 15%, (Sold by Each / Each = Poly Bottle of 4 L) (8, UN1805, PG III)</image:caption>
    </image:image>
  </url>
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      <image:caption>Potassium Ferrocyanide, 15% w/v, 20 L Cubitainer, Specialty, Labchem, P09301</image:caption>
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    <image:image>
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      <image:caption>Sodium Nitrite, Granular, Super Free-Flowing, Technical Grade, 50 lb Bag</image:caption>
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    <changefreq>daily</changefreq>
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      <image:caption>Sulfuric Acid 66 BE NSF, 750 lbs, Brenntag, 913215</image:caption>
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      <image:caption>Sodium Hydroxide, 1.0 Normal, 200 L Container (8, UN1824, P.G. II)</image:caption>
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    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIS-22390-1.png?v=1786101597</image:loc>
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      <image:caption>Silica Standard, 1000 ppm (1 mL = 1 mg SiO2), 500 mL Poly Bottle, LC223901</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/silica-standard-1000-ppm-1-ml-1-mg-sio2-125-ml-poly-bottle-labchem-lc223907</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIS-22390-7_30fcb278-9cc2-4275-8ab7-27f8d8e25a70.png?v=1786101599</image:loc>
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      <image:caption>Silica Standard, 1000 ppm (1 mL = 1 mg SiO2), 125 mL Poly Bottle, Labchem, LC223907</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/silver-aa-standard-1000-ppm-1-ml-1-mg-ag-silver-nitrate-water-traceable-to-nist-500-ml-amber-glass-bottle-lc224201-non-regulated</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIS-22420-1.png?v=1786101601</image:loc>
      <image:title>Silver AA Standard, 1000 ppm, 1 mL=1 mg Ag, Silver nitrate-water, Traceable to NIST, 500 mL Amber Glass Bottle, LC224201 (Non-Regulated)</image:title>
      <image:caption>Silver AA Standard, 1000 ppm, 1 mL=1 mg Ag, Silver nitrate-water, Traceable to NIST, 500 mL Amber Glass Bottle, LC224201 (Non-Regulated)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/silver-nitrate-10-w-v-125-ml-amber-glass-bottle-lc225507-non-regulated</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIS-22550-7.png?v=1786101603</image:loc>
      <image:title>Silver Nitrate, 10% w/v, 125 mL Amber Glass Bottle, LC225507 (Non-Regulated)</image:title>
      <image:caption>Silver Nitrate, 10% w/v, 125 mL Amber Glass Bottle, LC225507 (Non-Regulated)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/silver-nitrate-0-0192-n-0-0192-m-for-cyanide-1-ml-1-mg-cn-500-ml-amber-glass-bottle-lc226301-non-regulated</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIS-22630-1.png?v=1786101605</image:loc>
      <image:title>Silver Nitrate, 0.0192 N (0.0192 M), for Cyanide, (1 mL = 1 mg CN-) , 500 mL Amber Glass Bottle, LC226301 (Non-Regulated)</image:title>
      <image:caption>Silver Nitrate, 0.0192 N (0.0192 M), for Cyanide, (1 mL = 1 mg CN-) , 500 mL Amber Glass Bottle, LC226301 (Non-Regulated)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/silver-nitrate-0-0282-n-sold-by-each-each-1-l-non-regulated</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIS-22650-2.png?v=1786101607</image:loc>
      <image:title>Silver Nitrate, 0.0282 N (Sold by Each / Each = 1 L) (Non-Regulated)</image:title>
      <image:caption>Silver Nitrate, 0.0282 N (Sold by Each / Each = 1 L) (Non-Regulated)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/silver-nitrate-0-1-n-0-1-m-500-ml-amber-glass-bottle-labchem-lc227001</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIS-22700-1.png?v=1786101609</image:loc>
      <image:title>Silver Nitrate, 0.1 N (0.1 M), 500 mL Amber Glass Bottle, Labchem, LC227001</image:title>
      <image:caption>Silver Nitrate, 0.1 N (0.1 M), 500 mL Amber Glass Bottle, Labchem, LC227001</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/silver-nitrate-0-1-n-0-1-m-1-l-labchem-lc22700</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIS-22700-2.png?v=1787369803</image:loc>
      <image:title>Silver Nitrate, 0.1 N (0.1 M), 1 L, LabChem, LC22700</image:title>
      <image:caption>Silver Nitrate, 0.1 N (0.1 M), 1 L, LabChem, LC22700</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/silver-nitrate-0-1-n-0-1-m-4-l-amber-glass-bottle-traceable-to-nist-lc227004-non-regulated</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIS-22700-4_de5a78c6-1ba8-4e87-9357-651f91860f2f.png?v=1786101612</image:loc>
      <image:title>Silver Nitrate, 0.1 N (0.1 M), 4 L Amber Glass Bottle, Traceable to NIST, LC227004  (Non-Regulated)</image:title>
      <image:caption>Silver Nitrate, 0.1 N (0.1 M), 4 L Amber Glass Bottle, Traceable to NIST, LC227004  (Non-Regulated)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/silver-nitrate-0-282-n-0-282-m-1-ml-10-mg-cl-500-ml-amber-glass-bottle-traceable-to-nist-lc227251-non-regulated</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIS-22725-1_4f15fa06-bf72-4dda-a9ad-f564c372843f.png?v=1786101614</image:loc>
      <image:title>Silver Nitrate, 0.282 N (0.282 M), (1 mL = 10 mg Cl-) 500 mL Amber Glass Bottle, Traceable to NIST, LC227251  (Non-Regulated)</image:title>
      <image:caption>Silver Nitrate, 0.282 N (0.282 M), (1 mL = 10 mg Cl-) 500 mL Amber Glass Bottle, Traceable to NIST, LC227251  (Non-Regulated)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/silver-nitrate-1-0-n-1-0-m-500-ml-amber-glass-bottle-traceable-to-nist-lc227401-non-regulated</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIS-22740-1.png?v=1786101616</image:loc>
      <image:title>Silver Nitrate, 1.0 N (1.0 M), 500 mL Amber Glass Bottle, Traceable to NIST, LC227401  (Non-Regulated)</image:title>
      <image:caption>Silver Nitrate, 1.0 N (1.0 M), 500 mL Amber Glass Bottle, Traceable to NIST, LC227401  (Non-Regulated)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/sodium-carbonate-1-0-n-0-5-m-500-ml-poly-bottle-lc233801</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIS-23380-1_9663cba8-1270-4ff6-8742-daf3ab15391b.png?v=1786101618</image:loc>
      <image:title>Sodium Carbonate, 1.0 N (0.5 M), 500 mL Poly Bottle, LC233801</image:title>
      <image:caption>Sodium Carbonate, 1.0 N (0.5 M), 500 mL Poly Bottle, LC233801</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/sodium-chloride-0-1-n-0-1-m-500-ml-poly-bottle-traceable-to-nist-lc235701-non-regulated</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIS-23570-1.png?v=1786101621</image:loc>
      <image:title>Sodium Chloride, 0.1 N (0.1 M), 500 mL Poly Bottle, Traceable to NIST, LC235701  (Non-Regulated)</image:title>
      <image:caption>Sodium Chloride, 0.1 N (0.1 M), 500 mL Poly Bottle, Traceable to NIST, LC235701  (Non-Regulated)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/sodium-hydroxide-1-1-l-poly-bottle-lc240002-8-un1824-p-g-iii</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIS-24000-2_0a8449a6-8c54-4d20-9806-815bd8bed906.png?v=1786101622</image:loc>
      <image:title>Sodium Hydroxide, 1%, 1 L Poly Bottle, LC240002 (8, UN1824, P.G. III)</image:title>
      <image:caption>Sodium Hydroxide, 1%, 1 L Poly Bottle, LC240002 (8, UN1824, P.G. III)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/sodium-hydroxide-1-w-v-4-lpoly-bottle-lc240004-8-un1824-p-g-iii</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIS-24000-4_31a3a5a8-4f07-4392-a5e6-09d1e9d63d6a.png?v=1786101625</image:loc>
      <image:title>Sodium Hydroxide, 1% w/v, 4 LPoly Bottle, LC240004 (8, UN1824, P.G. III)</image:title>
      <image:caption>Sodium Hydroxide, 1% w/v, 4 LPoly Bottle, LC240004 (8, UN1824, P.G. III)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/sodium-hydroxide-5-w-v-1-l-poly-bottle-lc240402-8-un1824-p-g-ii</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIS-24040-2.png?v=1786101626</image:loc>
      <image:title>Sodium Hydroxide, 5% w/v, 1 L Poly Bottle, LC240402 (8, UN1824, P.G. II)</image:title>
      <image:caption>Sodium Hydroxide, 5% w/v, 1 L Poly Bottle, LC240402 (8, UN1824, P.G. II)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/sodium-hydroxide-50-w-w-reagent-grade-1-l-labchem-lc241502</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIS-24150-2_3029c23b-366b-4d06-bc30-c5a57ca801b6.png?v=1786101629</image:loc>
      <image:title>Sodium Hydroxide, 50% w/w, Reagent Grade, 1 L, LabChem, LC241502</image:title>
      <image:caption>Sodium Hydroxide, 50% w/w, Reagent Grade, 1 L, LabChem, LC241502</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/sodium-hydroxide-50-w-w-reagent-grade-20-l-labchem-lc241505</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIS-24150-5.png?v=1786101631</image:loc>
      <image:title>Sodium Hydroxide, 50% w/w, Reagent Grade, 20 L, LabChem, LC241505</image:title>
      <image:caption>Sodium Hydroxide, 50% w/w, Reagent Grade, 20 L, LabChem, LC241505</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/sodium-hydroxide-0-01n-0-01m-500-ml-poly-bottle-labchem-242001</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIS-24200-1.png?v=1786101633</image:loc>
      <image:title>Sodium Hydroxide, 0.01N (0.01M), 500 mL Poly Bottle, Labchem, 242001</image:title>
      <image:caption>Sodium Hydroxide, 0.01N (0.01M), 500 mL Poly Bottle, Labchem, 242001</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/sodium-hydroxide-0-01-n-0-01-m-500-ml-poly-bottle-labchem-242001</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIS-24220-1.png?v=1786101635</image:loc>
      <image:title>Sodium Hydroxide, 0.01 N (0.01 M), 500 mL Poly Bottle, Labchem, 242001</image:title>
      <image:caption>Sodium Hydroxide, 0.01 N (0.01 M), 500 mL Poly Bottle, Labchem, 242001</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/sodium-hydroxide-0-02-n-sold-by-each-each-1-l-poly-bottle-non-regulated</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIS-24220-2.png?v=1786101637</image:loc>
      <image:title>Sodium Hydroxide, 0.02 N (Sold by Each / Each = 1 L Poly Bottle) (Non-Regulated)</image:title>
      <image:caption>Sodium Hydroxide, 0.02 N (Sold by Each / Each = 1 L Poly Bottle) (Non-Regulated)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/sodium-hydroxide-0-02-n-sold-by-each-each-4-l-poly-bottle-non-regulated</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIS-24220-4_a47f8a47-90b1-443b-8649-8a30b3eb04bc.png?v=1786419220</image:loc>
      <image:title>Sodium Hydroxide, 0.02 N (Sold by Each / Each = 4 L Poly Bottle) (Non-Regulated)</image:title>
      <image:caption>Sodium Hydroxide, 0.02 N (Sold by Each / Each = 4 L Poly Bottle) (Non-Regulated)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/sodium-hydroxide-0-0227-n-0-0227-m-sold-by-each-each-poly-bottle-of-1-l-traceable-to-nist-non-regulated</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIS-24230-2_bc253c6d-810e-4adc-8f32-4d242a95906e.png?v=1786101640</image:loc>
      <image:title>Sodium Hydroxide, 0.0227 N (0.0227 M) (Sold by Each / Each = Poly Bottle of 1 L),  Traceable to NIST  (Non-Regulated)</image:title>
      <image:caption>Sodium Hydroxide, 0.0227 N (0.0227 M) (Sold by Each / Each = Poly Bottle of 1 L),  Traceable to NIST  (Non-Regulated)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/pis-24270-1-sodium-hydroxide-0-1-n-0-1-m-traceable-to-nist-500-ml-poly-bottle-non-regulated</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIS-24270-1.png?v=1786101643</image:loc>
      <image:title>PIS-24270-1 Sodium Hydroxide, 0.1 N (0.1 M), Traceable to NIST, 500 mL Poly Bottle (Non-Regulated)</image:title>
      <image:caption>PIS-24270-1 Sodium Hydroxide, 0.1 N (0.1 M), Traceable to NIST, 500 mL Poly Bottle (Non-Regulated)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/sodium-hydroxide-0-1-n-0-1-m-sold-by-each-each-1-liter-bottle-non-regulated</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIS-24270-2.png?v=1786101645</image:loc>
      <image:title>Sodium Hydroxide, 0.1 N (0.1 M) (Sold by Each / Each = 1 Liter Bottle) (Non-Regulated)</image:title>
      <image:caption>Sodium Hydroxide, 0.1 N (0.1 M) (Sold by Each / Each = 1 Liter Bottle) (Non-Regulated)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/sodium-hydroxde-0-1-n-0-1-m-traceable-to-nist-4-l-poly-bottle-non-regulated</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIS-24270-4_62d5512b-80c2-44e1-a587-d6c6c874bd46.png?v=1787783643</image:loc>
      <image:title>Sodium Hydroxde, 0.1 N (0.1 M), Traceable to NIST, 4 L Poly Bottle  (Non-Regulated)</image:title>
      <image:caption>Sodium Hydroxde, 0.1 N (0.1 M), Traceable to NIST, 4 L Poly Bottle  (Non-Regulated)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/sodium-hydroxide-0-1-n-0-1-m-sold-by-each-each-cubitainer-of-20-l-traceable-to-nist-non-regulated</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIS-24270-5_00aa3a26-56bc-40fb-8bdc-4e0e90897b93.png?v=1786101648</image:loc>
      <image:title>Sodium Hydroxide, 0.1 N (0.1 M) (Sold by Each / Each = Cubitainer of 20 L),  Traceable to NIST  (Non-Regulated)</image:title>
      <image:caption>Sodium Hydroxide, 0.1 N (0.1 M) (Sold by Each / Each = Cubitainer of 20 L),  Traceable to NIST  (Non-Regulated)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/sodium-hydroxide-0-1n-0-1m-10-l-cubitainer-labchem-lc242706</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIS-24270-6_a82a14d8-911e-432d-ac16-9202c5011363.png?v=1786101650</image:loc>
      <image:title>Sodium Hydroxide, 0.1N (0.1M), 10 L Cubitainer, LabChem, LC242706</image:title>
      <image:caption>Sodium Hydroxide, 0.1N (0.1M), 10 L Cubitainer, LabChem, LC242706</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/sodium-hydroxide-0-25-n-0-25-m-4-l-poly-bottle-labchem-lc243004</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIS-24300-4.png?v=1787024087</image:loc>
      <image:title>Sodium Hydroxide, 0.25 N (0.25 M), 4 L Poly Bottle, Labchem, LC243004</image:title>
      <image:caption>Sodium Hydroxide, 0.25 N (0.25 M), 4 L Poly Bottle, Labchem, LC243004</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/sodium-hydroxide-0-5-n-0-5-m-1-l-poly-bottle-traceable-to-nist-lc243302-8-un1824-p-g-iii</loc>
    <lastmod>2026-08-26T18:58:47-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIS-24330-2.png?v=1786101654</image:loc>
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