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    <loc>https://preiser.com/products/hydrofluoric-acid-48-acs-reagent-grade-gfs-chemicals-43935</loc>
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    <changefreq>daily</changefreq>
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  </url>
  <url>
    <loc>https://preiser.com/products/lead-acetate-trihydrate-acs-reagent-grade-100-g-gfs-chemicals-46830</loc>
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      <image:caption>Lead Acetate, Trihydrate, ACS Reagent Grade, 100 g, GFS Chemicals, 46830</image:caption>
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  </url>
  <url>
    <loc>https://preiser.com/products/lead-carbonate-acs-reagent-grade-100-g-gfs-chemicals-46872</loc>
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    <changefreq>daily</changefreq>
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      <image:caption>Lead Carbonate, ACS Reagent Grade, 100 g, GFS Chemicals, 46872</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/magnesium-oxide-reagent-acs-bottle-of-500-grams-non-regulated</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
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      <image:caption>Magnesium Oxide, Reagent (ACS) (Bottle of 500 Grams) (Non-Regulated)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/magnesium-sulfate-anhydrous-reagent-500-g-gfs-chemicals-49491</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/GFS-944-09_de440ebb-8991-4bbb-823b-e8e39629bbcb.png?v=1784718909</image:loc>
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      <image:caption>Magnesium Sulfate, Anhydrous Reagent, 500 g, GFS Chemicals, 49491</image:caption>
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  </url>
  <url>
    <loc>https://preiser.com/products/n-1-naphthylethylenediamine-dihydrochloride-acs-grade-reagent-25-g-gfs-chemicals-52051</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
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      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/GFS-968-05_f88c4235-1d5b-4238-85df-36d4e3b9c16b.png?v=1785287141</image:loc>
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      <image:caption>N-(1-Naphthyl)Ethylenediamine Dihydrochloride, ACS Grade Reagent, 25 g, GFS Chemicals, 52051</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/phenol-acs-reagent-crystals-500-g-58152-6-1-un1671-p-g-ii</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/GFS-980-09.png?v=1784718917</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>2026-07-28T21:29:34-04:00</lastmod>
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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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
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      <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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/GFS-A7302-09.png?v=1784718923</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/GFS-A7566.png?v=1784718925</image:loc>
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      <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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
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      <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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/GIL-BS399.png?v=1784718928</image:loc>
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      <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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/GIL-BS402.png?v=1784718930</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
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      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/GIL-PSA312.png?v=1784718931</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/GIL-RPTM-KEY209.png?v=1784718932</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/GIL-SC163_c3e5d2f1-9123-4683-ab6f-d14d7c635292.png?v=1784718934</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
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      <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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/GIL-SP-0.png?v=1784718937</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/GIL-SP3-01_8f597bc2-a2df-44a6-840b-585966612ec5.png?v=1784718939</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/GIL-SPA102-01_f07bc789-0775-4825-a19f-6678c67c475d.png?v=1784718940</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/GIL-SPA301.png?v=1784718941</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
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      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/GIL-SPA450_a606cf7d-176d-4e96-b23c-2842530601a0.png?v=1784718943</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/GIL-TM-6.png?v=1784718944</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/GIL-TSA117.png?v=1784718945</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/GIL-TSA136.png?v=1784718946</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
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      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/GIL-TSA163.png?v=1784718949</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/GIL-TSA172_aa7e6dbb-04bc-45db-9a82-08d40aedd704.png?v=1784718952</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/GIL-TSA183.png?v=1784718953</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/GIL-TSA188.png?v=1784718955</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>2026-07-28T21:29:34-04:00</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=1784718956</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>2026-07-28T21:29:34-04:00</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=1784718958</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>2026-07-28T21:29:34-04:00</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=1784718959</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/GLB-120330.png?v=1784718961</image:loc>
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      <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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/GLB-138090.png?v=1784718962</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/GLB-2910_4675431b-9934-438d-be41-20274672b7fc.png?v=1784718963</image:loc>
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      <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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/GLB-5912.png?v=1785287143</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/GLB-5920.png?v=1784718967</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>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/centrifuge-tube-15-ml-polystrene-molded-graduations-bulk-1000-cs-globe-scientific-6260</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/GLB-6260.png?v=1784718968</image:loc>
      <image:title>Centrifuge Tube, 15 mL, Polystrene, Molded Graduations, Bulk, 1000/CS, Globe Scientific, 6260</image:title>
      <image:caption>Centrifuge Tube, 15 mL, Polystrene, Molded Graduations, Bulk, 1000/CS, Globe Scientific, 6260</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/easy-pressure-syringe-filter-holder-25-mm-autoclavable-fits-any-standard-syringe-with-luer-type-fitting-6-pk</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/GLM-4320-01.png?v=1784718970</image:loc>
      <image:title>Pall Syringe Filter Holder, Easy-Pressure , 25 mm, Autoclavable, Fits any Standard Syringe with Luer-Type Fitting, 6/PK, Cytiva, 4320</image:title>
      <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>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/acrodisc-ion-chromatography-syringe-filters-pall-life-sciences-13-mm-0-2-micrometers</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/GLM-4483.png?v=1784718971</image:loc>
      <image:title>Acrodisc Ion Chromatography Syringe Filters, Pall Life Sciences, 13 mm, 0.2 Micrometers</image:title>
      <image:caption>Acrodisc Ion Chromatography Syringe Filters, Pall Life Sciences, 13 mm, 0.2 Micrometers</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/acrodisc-ion-chromatography-syringe-filters-pall-life-sciences-22-mm-0-2-micrometers</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/GLM-4583.png?v=1784718972</image:loc>
      <image:title>Acrodisc Ion Chromatography Syringe Filters, Pall Life Sciences, 22 mm, 0.2 Micrometers</image:title>
      <image:caption>Acrodisc Ion Chromatography Syringe Filters, Pall Life Sciences, 22 mm, 0.2 Micrometers</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/membrane-disc-filters-25-mm-diameter-0-45um-plain-non-sterile</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/GLM-60172-01.png?v=1784718973</image:loc>
      <image:title>Membrane Disc Filters, 25 mm Diameter, 0.45um, Plain, Non-Sterile</image:title>
      <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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/GLM-61663.png?v=1784718975</image:loc>
      <image:title>A/E Glass Fiber Filters, 76 mm Diameter, 1.0 Micron Retention, Fine Porosity, Fast Flow Rate, 100/PK</image:title>
      <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>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/GLM-66257-01_fa3041fe-8ce0-49ff-b36e-5cd527f332d7.png?v=1784718977</image:loc>
      <image:title>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:title>
      <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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/GLM-66408.png?v=1784718978</image:loc>
      <image:title>Versapor Membrane Disc Filters, Pall Life Sciences, 47 mm, 0.45 um</image:title>
      <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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/GLM-68101.png?v=1784718979</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/GLM-68105-01.png?v=1784718981</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/GLW-RG600_ff2be801-da2c-4a24-9471-f8582ba96aee.png?v=1784718982</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/GWI-BT00-50.png?v=1784718983</image:loc>
      <image:title>SPX-050 Inline Low Flow Meter, 1/2 inch, Global Water Instrumentation, Inc., BT0050</image:title>
      <image:caption>SPX-050 Inline Low Flow Meter, 1/2 inch, Global Water Instrumentation, Inc., BT0050</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/spx-100-inline-low-flow-meter-1-inch-global-water-instrumentation-inc-bt0100</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/GWI-SPX-01.png?v=1784718985</image:loc>
      <image:title>SPX-100 Inline Low Flow Meter, 1 inch, Global Water Instrumentation, Inc., BT0100</image:title>
      <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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAC-19700-01.png?v=1784718986</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAC-21259-15_dc760e99-267c-4f49-93c6-5584673e361d.png?v=1784718988</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAC-26621-05.png?v=1784718993</image:loc>
      <image:title>Turbidity Standards, Stablcal Stablized Formazin, &lt;0.1, 20, 200, 1000 and 4000 NTU, HACH, 2662105</image:title>
      <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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAC-LDO10103.png?v=1784718995</image:loc>
      <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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-102133.png?v=1784718996</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-102233_89e3c3a0-b366-44dd-98f9-d03fc850c71d.png?v=1784718998</image:loc>
      <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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-1037-69_5791e0d6-3973-4ae3-a579-ad847938d898.png?v=1784719002</image:loc>
      <image:title>Ferrous Iron Reagent Powder Pillows, 100/PK, HACH, 103769</image:title>
      <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>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-1043-99.png?v=1784719003</image:loc>
      <image:title>Chloride 2 Indicator Powder Pillows, 100/PK, HACH, 104399</image:title>
      <image:caption>Chloride 2 Indicator Powder Pillows, 100/PK, HACH, 104399</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/chloride-2-indicator-powder-pillows-100-ml-50-pk-hach-105766</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-1057-66_38bf7ed5-c278-4907-bff9-b08cc803a97a.png?v=1784923689</image:loc>
      <image:title>Chloride 2 Indicator Powder Pillows, 100 mL, 50/PK, HACH, 105766</image:title>
      <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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-1106-50.png?v=1784719007</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-110649.png?v=1784719009</image:loc>
      <image:title>Silica Standard Solution, 1 mg/L as SiO2 (NIST), 500 mL Poly Bottle, HACH, 110649</image:title>
      <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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-12066.png?v=1784719011</image:loc>
      <image:title>ChromaVer 3 Chromium Reagent Powder Pillows, 25 mL, 100/PK, HACH 1206699</image:title>
      <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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-1269-36.png?v=1784719013</image:loc>
      <image:title>Silicone Oil, 15 mL Screw Cap Dropper Bottle, HACH, 126936</image:title>
      <image:caption>Silicone Oil, 15 mL Screw Cap Dropper Bottle, HACH, 126936</image:caption>
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  <url>
    <loc>https://preiser.com/products/chromaver-3-chromium-reagent-powder-pillows-5-or-10-ml-samples-100-pk-1271099</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-12710-01.png?v=1784719015</image:loc>
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      <image:caption>ChromaVer 3 Chromium Reagent Powder Pillows, 5 or 10 mL Samples, 100/PK, 1271099</image:caption>
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  <url>
    <loc>https://preiser.com/products/hach-copper-standard-solution-10-mg-l-as-cu-nist-100-ml-measured-dropper-bottle</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-12932_4ea75a4d-2074-4cd0-b214-61b2e3b414e1.png?v=1784719017</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>
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  </url>
  <url>
    <loc>https://preiser.com/products/sample-cell-glass-1-in-square-25-ml-unmatched-pair-2-pk-hach-1353702</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-1353702.png?v=1784719018</image:loc>
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      <image:caption>Sample Cell, Glass, 1 in. Square, 25 mL, Unmatched Pair, 2/PK, HACH, 1353702</image:caption>
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  </url>
  <url>
    <loc>https://preiser.com/products/cyclohexanone-100-ml-amber-glass-bottle-hach-1403332</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-14033-32_c5d430e0-fdf5-4b2a-aab3-6bcf4c80ada0.png?v=1784719020</image:loc>
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      <image:caption>Cyclohexanone, 100 mL Amber Glass Bottle, HACH, 1403332</image:caption>
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  </url>
  <url>
    <loc>https://preiser.com/products/nitraver%C2%AE-5-nitrate-reagent-powder-pillows-5-ml-100-pk-hach-1403599</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-14035-99_79339702-4188-45be-912d-5e1fd80bf412.png?v=1784719022</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>
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  </url>
  <url>
    <loc>https://preiser.com/products/dpd-total-chlorine-reagent-25-ml-powder-pillows-package-of-100-non-regulated</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-14064-99.png?v=1784719024</image:loc>
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      <image:caption>DPD Total Chlorine Reagent, 25 mL, Powder Pillows (Package of 100) (Non-Regulated)</image:caption>
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  </url>
  <url>
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    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
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      <image:title>HACH DPD Free Chlorine Reagent Powder Pillows, 25 mL 1000/PK</image:title>
      <image:caption>HACH DPD Free Chlorine Reagent Powder Pillows, 25 mL 1000/PK</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/dpd-free-chlorine-reagent-25-ml-powder-pillows-package-of-100-non-regulated</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-14070-99.png?v=1784719029</image:loc>
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      <image:caption>DPD Free Chlorine Reagent, 25 mL, Powder Pillows (Package of 100) (Non-Regulated)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/hach-dpd-total-chlorine-reagent-powder-pillows-5-ml-sample-100-pk</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-14076-99_97b6ce44-d67a-40ff-b903-fdbe1ac4ab36.png?v=1784719031</image:loc>
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      <image:caption>HACH DPD Total Chlorine Reagent Powder Pillows, 5 mL Sample, 100/PK</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/hach-dpd-free-chlorine-reagent-powder-pillows-5-ml-sample-pk-100</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-14077-99.png?v=1784719033</image:loc>
      <image:title>HACH DPD Free Chlorine Reagent Powder Pillows, 5 mL Sample, PK/100</image:title>
      <image:caption>HACH DPD Free Chlorine Reagent Powder Pillows, 5 mL Sample, PK/100</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/nitriver-3-nitrite-reagent-powder-pillows-5-ml-100-pk-hach-1407899</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-14078-99_f65fc421-7865-44c8-acc7-0e7d749dde38.png?v=1784719034</image:loc>
      <image:title>NitriVer 3 Nitrite Reagent Powder Pillows, 5 mL, 100/PK, HACH, 1407899</image:title>
      <image:caption>NitriVer 3 Nitrite Reagent Powder Pillows, 5 mL, 100/PK, HACH, 1407899</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/ec-medium-mpn-tubes-15-pk-hach-1410415</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-14104-15.png?v=1785287144</image:loc>
      <image:title>EC Medium MPN Tubes, 15/PK, HACH, 1410415</image:title>
      <image:caption>EC Medium MPN Tubes, 15/PK, HACH, 1410415</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/molyver-1-reagent-25-ml-powder-pillows-package-of-100-non-regulated</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-14146-69.png?v=1784719038</image:loc>
      <image:title>MolyVer-1 Reagent, 25 mL, Powder Pillows (Package of 100) (Non-Regulated)</image:title>
      <image:caption>MolyVer-1 Reagent, 25 mL, Powder Pillows (Package of 100) (Non-Regulated)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/molyver-2-reagent-25-ml-powder-pillows-package-of-100-non-regulated</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-14148-69.png?v=1784719040</image:loc>
      <image:title>MolyVer-2 Reagent, 25 mL, Powder Pillows (Package of 100) (Non-Regulated)</image:title>
      <image:caption>MolyVer-2 Reagent, 25 mL, Powder Pillows (Package of 100) (Non-Regulated)</image:caption>
    </image:image>
  </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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-14160-66.png?v=1784719042</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>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/molyver-3-reagent-25-ml-powder-pillows-package-of-100-non-regulated</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-14178-69.png?v=1784719043</image:loc>
      <image:title>MolyVer-3 Reagent, 25 mL, Powder Pillows (Package of 100) (Non-Regulated)</image:title>
      <image:caption>MolyVer-3 Reagent, 25 mL, Powder Pillows (Package of 100) (Non-Regulated)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/cuver-1-copper-reagent-powder-pillows-25-ml-100-pk-hach-1418801</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-14188-01_5718f74a-25f1-40a5-99f8-d931b764cb4d.png?v=1784719045</image:loc>
      <image:title>CuVer 1 Copper Reagent Powder Pillows, 25 mL, 100/PK, HACH, 1418801</image:title>
      <image:caption>CuVer 1 Copper Reagent Powder Pillows, 25 mL, 100/PK, HACH, 1418801</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/s5000-phosphate-molybdovanadate-reagent-2-9-l-bottle-8-un3264-p-g-iii</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-14207-03.png?v=1784719047</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>
    </image:image>
  </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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-14268-10.png?v=1784719048</image:loc>
      <image:title>Chlorine Standard Solution 50-75 mg/L as Cl2, 10 mL Ampules, NIST (Sold by Each / Each = 16 Ampules)</image:title>
      <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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-1427010.png?v=1784719050</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-14542-00_344efae3-4909-4087-b6bf-22e6cd16a89b.png?v=1784719051</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-1456842.png?v=1784719053</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-14577-99_3f4f1821-9c31-4f9b-b59f-5f5f74204ce4.png?v=1784719055</image:loc>
      <image:title>HACH Ascorbic Acid Powder Pillows, 100/PK</image:title>
      <image:caption>HACH Ascorbic Acid Powder Pillows, 100/PK</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/ph-test-kit-color-disc-4-10-ph-300-test-1470-11</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
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      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-147011_f7c14785-3fbf-4668-82a4-bc463ca5f39b.png?v=1784719060</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-14861-66.png?v=1784719062</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-14862-66_ed1dc5eb-cd38-491b-82d6-ce48c36f97be.png?v=1784719064</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-14863-98.png?v=1784777943</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-14865-10.png?v=1784719067</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-1502.png?v=1784719068</image:loc>
      <image:title>Container Support, HACH, 1502</image:title>
      <image:caption>Container Support, HACH, 1502</image:caption>
    </image:image>
  </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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-15349_bd6806f1-cb2a-444b-9e1c-5d5eee2ebfe9.png?v=1784719070</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-16232.png?v=1784719072</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-16900-01_ae257fcf-afca-4937-8136-3fab2dceb2db.png?v=1784719074</image:loc>
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      <image:caption>Digital Titrator, 0.00125 mL/digit, HACH, 1690001</image:caption>
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  </url>
  <url>
    <loc>https://preiser.com/products/delivery-tubes-for-digital-titrator-5-pk</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-17205-00_63d2c987-b5b5-4328-8897-588d64e4de55.png?v=1784719075</image:loc>
      <image:title>Delivery Tubes for Digital Titrator, 5/PK</image:title>
      <image:caption>Delivery Tubes for Digital Titrator, 5/PK</image:caption>
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  </url>
  <url>
    <loc>https://preiser.com/products/rochelle-salt-solution-29-ml-dropper-bottle-hach-172533</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-1725-33.png?v=1784719077</image:loc>
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      <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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-172549.png?v=1784719079</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>
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  </url>
  <url>
    <loc>https://preiser.com/products/glass-viewing-tube-6-pk-hach-173006</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-1730-06.png?v=1784719081</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-1891-49.png?v=1784719083</image:loc>
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      <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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-18950-00.png?v=1784719084</image:loc>
      <image:title>Lamp Assembly, GE 1630, for 1720D/1720E Low-Range Turbidimeters</image:title>
      <image:caption>Lamp Assembly, GE 1630, for 1720D/1720E Low-Range Turbidimeters</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/sodium-hydroxide-standard-solution-0-0227-n-1-l-poly-bottle-hach-19253</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-19253.png?v=1784719087</image:loc>
      <image:title>Sodium Hydroxide Standard Solution, 0.0227 N, 1 L Poly Bottle, HACH, 19253</image:title>
      <image:caption>Sodium Hydroxide Standard Solution, 0.0227 N, 1 L Poly Bottle, HACH, 19253</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/hach-ammonium-molybdate-reagent-100-ml-marked-dropper-bottle</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-193332.png?v=1784719088</image:loc>
      <image:title>HACH Ammonium Molybdate Reagent, 100 mL Marked Dropper Bottle</image:title>
      <image:caption>HACH Ammonium Molybdate Reagent, 100 mL Marked Dropper Bottle</image:caption>
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  </url>
  <url>
    <loc>https://preiser.com/products/amino-acid-reagent-for-phosphate-determinations-100-tests-non-regulated</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-1934-32.png?v=1784719090</image:loc>
      <image:title>Amino Acid Reagent, for Phosphate Determinations, 100 Tests (Non-Regulated)</image:title>
      <image:caption>Amino Acid Reagent, for Phosphate Determinations, 100 Tests (Non-Regulated)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/molybdate-3-reagent-for-silica-analysis-2-9-l-bottle-8-un3264-p-g-iii</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-1995-03.png?v=1784719092</image:loc>
      <image:title>Molybdate 3 Reagent, for Silica Analysis, 2.9 L Bottle (8, UN3264, P.G. III)</image:title>
      <image:caption>Molybdate 3 Reagent, for Silica Analysis, 2.9 L Bottle (8, UN3264, P.G. III)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/hach-molybdate-3-reagent-100-ml</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-1995-32_74c7dbc8-f492-43f7-8d54-52b22520cee9.png?v=1784777945</image:loc>
      <image:title>HACH Molybdate 3 Reagent, 100 mL</image:title>
      <image:caption>HACH Molybdate 3 Reagent, 100 mL</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/molybdate-3-reagent-1-l-hach-199553</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-1995-53_de7d69f1-991b-4ea9-ba83-aab399a70d54.png?v=1784719096</image:loc>
      <image:title>Molybdate 3 Reagent, 1 L, HACH 199553</image:title>
      <image:caption>Molybdate 3 Reagent, 1 L, HACH 199553</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/phenylarsine-oxide-pao-standard-solution-0-00564-n-100-ml-hach-199942</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-199942.png?v=1784719100</image:loc>
      <image:title>Phenylarsine Oxide (PAO) Standard Solution, 0.00564 N, 100 mL, HACH, 199942</image:title>
      <image:caption>Phenylarsine Oxide (PAO) Standard Solution, 0.00564 N, 100 mL, HACH, 199942</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/sulfuric-acid-standard-solution-0-020-n-n-50-4-l</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-20356.png?v=1784719102</image:loc>
      <image:title>Sulfuric Acid Standard Solution, 0.020 N (N/50), 4 L</image:title>
      <image:caption>Sulfuric Acid Standard Solution, 0.020 N (N/50), 4 L</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/edta-standard-solution-for-hardness-determination-0-0200n-4l</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-205-56.png?v=1784719104</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>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/hach-titraver-edta-standard-solution-0-0200-n-1-l</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-20553.png?v=1784719106</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>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/molybdovanadate-reagent-100-ml-marked-dropper-bottle</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-20760-32.png?v=1784719108</image:loc>
      <image:title>Molybdovanadate Reagent, 100 mL Marked Dropper Bottle</image:title>
      <image:caption>Molybdovanadate Reagent, 100 mL Marked Dropper Bottle</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/hach-molybdovanadate-reagent-500-ml</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-20760-49.png?v=1784719110</image:loc>
      <image:title>HACH Molybdovanadate Reagent, 500 mL</image:title>
      <image:caption>HACH Molybdovanadate Reagent, 500 mL</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/hach-potassium-persulfate-powder-pillows-100-pk</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-20847-69.png?v=1784719112</image:loc>
      <image:title>HACH Potassium Persulfate Powder Pillows, 100/PK</image:title>
      <image:caption>HACH Potassium Persulfate Powder Pillows, 100/PK</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/turbidity-sample-cell-1-in-round-glass-30-ml-with-cap</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-20849-00.png?v=1784719113</image:loc>
      <image:title>Turbidity Sample Cell, 1 in. Round Glass, 30 mL, with Cap</image:title>
      <image:caption>Turbidity Sample Cell, 1 in. Round Glass, 30 mL, with Cap</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/chloride-drop-count-titration-test-kit-model-cd-51-hach-208601</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-2086-01.png?v=1784719117</image:loc>
      <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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-21008-03.png?v=1784719119</image:loc>
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      <image:caption>Silica Standard Solution, 500ug/L (Bottle of 2.9 L) (Non-Regulated)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/silica-standard-solution-0-50-mg-l-3-78-l-hach-2100817</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-2100817.png?v=1784719121</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>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/dpd-free-chlorine-reagent-powder-pillows-10-ml-sample-size-1000-pk-2105528</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
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      <image:caption>DPD Free Chlorine Reagent Powder Pillows, 10 mL Sample Size, 1000/PK, 2105528</image:caption>
    </image:image>
  </url>
  <url>
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    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
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      <image:caption>DPD Free Chlorine Reagent, 10 mL Sample, Powder Pillows, Range: up to 2.00 mg/L.</image:caption>
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  </url>
  <url>
    <loc>https://preiser.com/products/dpd-total-chlorine-reagent-10-ml-sample-powder-pillows-package-of-1000</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-21056-28.png?v=1784719129</image:loc>
      <image:title>DPD Total Chlorine Reagent, 10 mL Sample, Powder Pillows (Package of 1000)</image:title>
      <image:caption>DPD Total Chlorine Reagent, 10 mL Sample, Powder Pillows (Package of 1000)</image:caption>
    </image:image>
  </url>
  <url>
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    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-21056-69.png?v=1784719131</image:loc>
      <image:title>DPD Total Chlorine Reagent, 10 mL Sample, Powder Pillows, Range: up to 2.00 mg/L</image:title>
      <image:caption>DPD Total Chlorine Reagent, 10 mL Sample, Powder Pillows, Range: up to 2.00 mg/L</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/hach-ferrover-iron-reagent-powder-pillows-10-ml-sample-100-pk</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
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      <image:caption>HACH FerroVer Iron Reagent Powder Pillows, 10 mL Sample, 100/PK</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/phosver-3-phosphate-reagent-powder-pillows-10-ml-sample-size-50-pk-hach-2106046</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-21060-46.png?v=1784719135</image:loc>
      <image:title>PhosVer 3 Phosphate Reagent Powder Pillows, 10 mL Sample Size, 50/PK, HACH, 2106046</image:title>
      <image:caption>PhosVer 3 Phosphate Reagent Powder Pillows, 10 mL Sample Size, 50/PK, HACH, 2106046</image:caption>
    </image:image>
  </url>
  <url>
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    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-21060-69_cab6d7ec-fb22-4f3d-aed6-b45452791009.png?v=1784719137</image:loc>
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      <image:caption>PhosVer 3 Phosphate Reagent, 10 mL Sample Size (Package of 100 Powder Pillows)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/hach-nitraver-5-nitrate-reagent-powder-pillows-10-ml-sample-100-pk</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-21061-69.png?v=1784719139</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>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/zincover-5-zinc-reagent-powder-pillows-20-ml-100-pk-hach-2106669</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-21066-69_cab2ff49-af2f-4836-aa0e-07f08c5cda7d.png?v=1784719141</image:loc>
      <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>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/hach-sulfaver-4-sulfate-reagent-powder-pillows-10-ml-sample-100-pk</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-21067-69.png?v=1784719143</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>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/cyaniver-4-cyanide-reagent-powder-pillows-10-ml-pk-100-pyridine-pyrazolone-method</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
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    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-21069-69.png?v=1784719146</image:loc>
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      <image:caption>CyaniVer 4 Cyanide Reagent Powder Pillows, 10 mL, PK/100--Pyridine-Pyrazolone Method</image:caption>
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  <url>
    <loc>https://preiser.com/products/nitrite-high-range-nitriver-2-reagent-10-ml-samples-powder-pillows-non-regulated</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
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      <image:caption>Nitrite High Range, NitriVer-2 Reagent , 10 mL Samples, Powder Pillows (Non-Regulated)</image:caption>
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  <url>
    <loc>https://preiser.com/products/buffer-10-ml-powder-pillows-for-manganese-citrate-type-cold-periodate-method-100-pk</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-21076-69_b6b5cec8-9af1-42c8-aeb5-6291b1c4ff18.png?v=1784719150</image:loc>
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      <image:caption>Buffer, 10 mL Powder Pillows, for Manganese Citrate Type, Cold Periodate Method, 100/PK</image:caption>
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  </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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-21077-69.png?v=1784719152</image:loc>
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      <image:caption>Sodium Periodate, 10 mL Powder Pillows, for Manganese, Cold Periodate Method, 10 mL sample, 100/PK</image:caption>
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  </url>
  <url>
    <loc>https://preiser.com/products/phenol-red-indicator-solution-100-ml-market-dropper-bottle-hach-21132</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-21132_1ce51f1c-5ff5-44d1-8234-fb17e6fce328.png?v=1784719154</image:loc>
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      <image:caption>Phenol Red Indicator Solution, 100 mL Market Dropper Bottle, HACH, 21132</image:caption>
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  </url>
  <url>
    <loc>https://preiser.com/products/hach-nessler-reagent-500-ml-for-ammonia-nitrogen</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-21194-49.png?v=1784719156</image:loc>
      <image:title>HACH Nessler Reagent, 500 mL, for Ammonia Nitrogen</image:title>
      <image:caption>HACH Nessler Reagent, 500 mL, for Ammonia Nitrogen</image:caption>
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  </url>
  <url>
    <loc>https://preiser.com/products/hach-alkaline-cyanide-reagent-500-ml</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-21223-49.png?v=1784719159</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-2122326.png?v=1784719160</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-2122426.png?v=1785287146</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-2125-01_fdb42fc2-7d0d-43cf-9cea-37b9d72e07b9.png?v=1784719163</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-21412-99.png?v=1784719165</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-21413-42.png?v=1784719166</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>
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  </url>
  <url>
    <loc>https://preiser.com/products/buffer-dilution-water-pillows-makes-1-l-per-pillow-package-of-25</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-21431-66_71fce31a-5b46-4420-9e0e-3df6f70be39a.png?v=1784719168</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-21856-28.png?v=1784719169</image:loc>
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      <image:caption>Pipet Tips, for TenSette Pipet 1970001, 0.1-1.0 mL, 1000/PK</image:caption>
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  <url>
    <loc>https://preiser.com/products/pipet-tips-for-tensette-pipet-1970001-0-1-1-0-ml-50-pk-hach-2185696</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-21856-96.png?v=1784719171</image:loc>
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      <image:caption>Pipet Tips, for TenSette Pipet 1970001, 0.1-1.0 mL, 50/PK, HACH, 2185696</image:caption>
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  </url>
  <url>
    <loc>https://preiser.com/products/methyl-purple-indicator-solution-100-ml-marked-dropper-bottle-hach-2193432</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-2193432_783094d9-d92c-4e35-b665-07573123b4a2.png?v=1784719173</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-21978-46.png?v=1784719175</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-21982-46.png?v=1784719177</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>
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  </url>
  <url>
    <loc>https://preiser.com/products/mercuric-thiocyanate-solution-sold-by-each-each-200-ml-bottle</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-2212129_b1e7c90c-caba-4803-af16-36b076c9b26a.png?v=1784719180</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-2212242_a147d896-ca00-4674-9d47-4f4b552710fb.png?v=1784719183</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-2219-69_8951a754-fc78-40fa-9d02-a9ef1453d579.png?v=1784719184</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-22269-64.png?v=1784719186</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-22270-64.png?v=1784719188</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-22271-64_d2a89770-edc9-4f6e-b380-b0bff474425b.png?v=1784719190</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-2230-99.png?v=1784719192</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-2231-01_1e935c32-2466-4168-ba42-68e90ad68efd.png?v=1784719195</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-2236-32.png?v=1784719196</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-22420-00.png?v=1784719198</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-2244300.png?v=1784719206</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-22538-69.png?v=1784719207</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-22542-32_4fe61490-4fd3-4516-8f62-da7a58d3e2ce.png?v=1785287148</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-22542-49.png?v=1784719213</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-2291700.png?v=1784719215</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-22963-23_74832f22-5bf4-43ba-bb8c-93488f181da0.png?v=1784923691</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-22972-55_983b2f65-fc3a-473a-87de-b9625734678c.png?v=1784719219</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-23140-11_3c076d18-1c05-4955-9838-25f48c722937.png?v=1784719221</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-23141-11.png?v=1784719223</image:loc>
      <image:title>Chlorine, Chlorine-Free, Buffer Solution, for CL17 and CL17sc Analyzers, 473 mL, (Non-Regulated), HACH, 2314111</image:title>
      <image:caption>Chlorine, Chlorine-Free, Buffer Solution, for CL17 and CL17sc Analyzers, 473 mL, (Non-Regulated), HACH, 2314111</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/hach-chloride-reagent-set-mercuric-thiocyanate-100-tests</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-23198-00_6dd33570-6194-42f9-933f-f7fa123e0388.png?v=1784719226</image:loc>
      <image:title>HACH Chloride Reagent Set, Mercuric Thiocyanate, 100 Tests</image:title>
      <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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-23292-32.png?v=1784719227</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-23292-49.png?v=1784719230</image:loc>
      <image:title>Bromcresol Green-Methyl Red Indicator Solution, 500 mL, HACH 2329249 [Representative Image]</image:title>
      <image:caption>Bromcresol Green-Methyl Red Indicator Solution, 500 mL, HACH 2329249 [Representative Image]</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/wide-range-ph-indicator-solution-100-ml-dropper-bottle-hach-2329332</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-23293-32.png?v=1784719231</image:loc>
      <image:title>Wide Range pH Indicator Solution, 100 mL Dropper Bottle, HACH, 2329332</image:title>
      <image:caption>Wide Range pH Indicator Solution, 100 mL Dropper Bottle, HACH, 2329332</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/wide-range-ph-indicator-solution-1-l-hach-2329353</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-23293-53.png?v=1784719234</image:loc>
      <image:title>Wide Range pH Indicator Solution, 1 L, HACH, 2329353</image:title>
      <image:caption>Wide Range pH Indicator Solution, 1 L, HACH, 2329353</image:caption>
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  </url>
  <url>
    <loc>https://preiser.com/products/hach-bromocresol-green-indicator-solution-500-ml</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-23295-49.png?v=1784719235</image:loc>
      <image:title>HACH Bromocresol Green Indicator Solution, 500 mL</image:title>
      <image:caption>HACH Bromocresol Green Indicator Solution, 500 mL</image:caption>
    </image:image>
  </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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-23470-03.png?v=1784719237</image:loc>
      <image:title>Citric Acid/Surfactant Reagent, for Silica Analysis (Sold by Each / Each = 2.9 L Bottle) (8, UN3265, P.G. III)</image:title>
      <image:caption>Citric Acid/Surfactant Reagent, for Silica Analysis (Sold by Each / Each = 2.9 L Bottle) (8, UN3265, P.G. III)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/hach-sulfuric-acid-standard-solution-0-035-n-100-ml-marked-dropper-bottle</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-23497-32.png?v=1784719240</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>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/chloride-titrant-silver-nitrate-0-0493n-100-ml-mdb-hach-2349832</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-23498-32.png?v=1784719241</image:loc>
      <image:title>Chloride Titrant, Silver Nitrate, 0.0493N, 100 mL MDB, HACH, 2349832</image:title>
      <image:caption>Chloride Titrant, Silver Nitrate, 0.0493N, 100 mL MDB, HACH, 2349832</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/hach-edta-standard-solution-0-035-n-100-ml-marked-dropper-bottle</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-23499-32.png?v=1784719243</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-23524-49.png?v=1784719245</image:loc>
      <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>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/molybdenum-2-reagent-solution-500-ml-hach-2352549</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-23525-49.png?v=1784719247</image:loc>
      <image:title>Molybdenum 2 Reagent Solution, 500 mL, HACH, 2352549</image:title>
      <image:caption>Molybdenum 2 Reagent Solution, 500 mL, HACH, 2352549</image:caption>
    </image:image>
  </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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-23531-03.png?v=1784719249</image:loc>
      <image:title>Amino Acid F Reagent, for Silica Analysis, 2.7 L Solution + Amino Acid F Powder Reagent (Non-Regulated)</image:title>
      <image:caption>Amino Acid F Reagent, for Silica Analysis, 2.7 L Solution + Amino Acid F Powder Reagent (Non-Regulated)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/chloride-standard-solution-100-mg-l-1-l-poly-bottle-hach-2370853</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-23708-53.png?v=1784719251</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>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/anionic-surfactant-solution-sold-by-each-each-2-9-l-bottle-non-regulated</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-23755-03.png?v=1784719253</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-23765-26.png?v=1784719255</image:loc>
      <image:title>Polyvinyl Alcohol Dispersing Agent in 50 mL Self-Contained Dropper Bottle, 2376526</image:title>
      <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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-23766-26.png?v=1784719256</image:loc>
      <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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-2378-42_27340968-f96d-4772-b147-f0fc8669f330.png?v=1784719258</image:loc>
      <image:title>HACH Zinc Standard Solution, 100 mg/L as Zn (NIST), 100 mL</image:title>
      <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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-23864-42_43d24427-503a-4ad7-9e6a-ea3730ea82af.png?v=1784777949</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-24019-06_68484308-eda8-47d2-a86f-c7de709baa09.png?v=1784719262</image:loc>
      <image:title>Glass Sample Cell, 25 mm Round, 10-20-25 mL Marks, 6/PK, 2401906</image:title>
      <image:caption>Glass Sample Cell, 25 mm Round, 10-20-25 mL Marks, 6/PK, 2401906</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/hach-ammonia-standard-solution-100-mg-l-2-mg-l-as-nh3n-500-ml</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-24065-49.png?v=1784719264</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>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/sample-cell-1-in-round-glass-with-caps-10-ml-6-pk-hach-2427606</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-24276-06.png?v=1784719265</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-24323-09.png?v=1784719268</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>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/bart-tester-sulfate-reducing-bacteria-sold-by-each-each-9-vials</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-24324-09.png?v=1784719269</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-2449-03.png?v=1784719271</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>
    </image:image>
  </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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-2450-32_dd0da586-7ac0-4efa-be95-3608620c4574.png?v=1784719275</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-2459300.png?v=1784719278</image:loc>
      <image:title>Silica, Low Range, Reagent Set, 10mL, 100/EA, 2459300</image:title>
      <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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-246066.png?v=1784719280</image:loc>
      <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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-2461-42.png?v=1784719282</image:loc>
      <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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-24846-00.png?v=1784719283</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-24931-20_b621fbab-721a-4c63-a4cd-4b1a9fa78a63.png?v=1784719285</image:loc>
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      <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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-24932-20.png?v=1784719287</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-24954-02.png?v=1784719289</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-25020-25_d8f21633-21a4-4e35-9cdb-627804d3d1ca.png?v=1784719290</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-25030-25_5feafbba-927a-45dd-8c1d-ce170218ddaf.png?v=1784719292</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-2527025.png?v=1784719293</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-2533-35.png?v=1784719296</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-25569-00.png?v=1784719299</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-25570-00_778808c1-4179-4a14-be26-6674bc066bb9.png?v=1784777952</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-2562-00.png?v=1784719304</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-2581400.png?v=1784719310</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-258999.png?v=1784719312</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-2603449.png?v=1784719314</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-26035-49.png?v=1784719316</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-26036-49.png?v=1784719318</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-26045-45_6553a54c-5786-4a32-9b32-2ae30cfd01ee.png?v=1784719322</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-26053-45_d4d32d99-aab0-449f-a167-6c5565833e99.png?v=1784777955</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-26069-45.png?v=1784923694</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-26087-99.png?v=1784719330</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-26193-09_567aaf07-35ff-4d72-870f-a6d9348c0ede.png?v=1784719331</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-26194-07.png?v=1784719333</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-26353-00.png?v=1784719335</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-2657512.png?v=1784719337</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-26601-53.png?v=1784719341</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-2667200.png?v=1784719343</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-26980-42.png?v=1784719345</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-27425-45.png?v=1784777961</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-27426-45.png?v=1784719349</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-27448-50.png?v=1784719351</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-27449-40.png?v=1785287149</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>
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    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-27513-40.png?v=1785287151</image:loc>
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  </url>
  <url>
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    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-2755325.png?v=1784719358</image:loc>
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      <image:caption>Ammonia (Nitrogen) Test Strips, 0 to 6.0 mg/L, 25/PK, HACH, 2755325</image:caption>
    </image:image>
  </url>
  <url>
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    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-27565-49.png?v=1784719359</image:loc>
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      <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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-2768549.png?v=1784719362</image:loc>
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      <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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-2769149.png?v=1784719363</image:loc>
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      <image:caption>HACH Hardness Indicator Solution for SP510 Hardness Monitor, 500 mL, 2 mg/L</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/manver-2-hardness-indicator-powder-113-grams-apha-hardness-method</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-280-14.png?v=1784719365</image:loc>
      <image:title>ManVer 2 Hardness Indicator Powder, 113 grams. APHA, Hardness Method</image:title>
      <image:caption>ManVer 2 Hardness Indicator Powder, 113 grams. APHA, Hardness Method</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/dpd-total-chlorine-reagent-swiftest-dispenser-hach-2802400</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-2802400_f098b97c-c4d6-4e22-9986-b8bdb323bb93.png?v=1784719367</image:loc>
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      <image:caption>DPD Total Chlorine Reagent, Swiftest Dispenser, HACH, 2802400</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/calver-2-calcium-indicator-113-g-amber-glass-bottle-hach-28114h</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-28114H.png?v=1784719369</image:loc>
      <image:title>CalVer 2 Calcium Indicator, 113 g  Amber Glass Bottle, HACH, 28114H</image:title>
      <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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-28232-01_5d05b5a2-483f-455f-bb68-19eba1ecb802.png?v=1784719371</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-28249.png?v=1784719373</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-28958-05.png?v=1784719376</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-2937606_02eaf29b-1d1e-4bdc-ba4b-00f8aee86fef.png?v=1784719377</image:loc>
      <image:title>Bottle, Dropping, Assembly, 59 mL, 6/PK, HACH, 2937606</image:title>
      <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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-29475-49.png?v=1784719379</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-2947553_4a53b0e5-d278-4c04-b702-9e00947ff00f.png?v=1784719381</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-29644-49.png?v=1784719383</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-2965026.png?v=1784719385</image:loc>
      <image:title>Filling Solution, Reference, 2.44 M KCl, 59 mL, HACH, 2965026</image:title>
      <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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-29712-05.png?v=1784719387</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-2980500.png?v=1784719389</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-32332.png?v=1784719391</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-424-32_3bc375a9-11a1-4c8d-a9fb-accb35e54573.png?v=1784777965</image:loc>
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      <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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
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      <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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-424-53.png?v=1784719398</image:loc>
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      <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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-425-32.png?v=1784719400</image:loc>
      <image:title>ManVer Hardness 2 Indicator Solution, 100 mL Marked Dropper Bottle, HACH 42532</image:title>
      <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>
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    <changefreq>daily</changefreq>
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      <image:caption>ManVer Hardness 2 Indicator Solution, 500 mL Bottle, HACH 42549 [Representative Image]</image:caption>
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  </url>
  <url>
    <loc>https://preiser.com/products/hardness-3-solution-100-ml-marked-dropper-bottle-hach-42632</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
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      <image:caption>Hardness 3 Solution, 100 mL Marked Dropper Bottle, HACH, 42632</image:caption>
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  </url>
  <url>
    <loc>https://preiser.com/products/spadns-fluoride-reagent-solution-500-ml-hach-44449-representative-image</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
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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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
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      <image:caption>SPADNS Fluoride Reagent Solution, 1 L, HACH, 44453</image:caption>
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  </url>
  <url>
    <loc>https://preiser.com/products/spadns-fluoride-reagent-solution-3-78-l-hach-44417</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-44417_972e331e-d23b-4739-b58a-d62cc1d8ab45.png?v=1784719410</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-44471-69_bbf04554-163f-436c-8c46-c99425f5dbe7.png?v=1784719412</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-45627-00.png?v=1784719416</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-4822800.png?v=1784719419</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-49200.png?v=1784719422</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-51000_5509f8f6-d4e0-4e3e-a08b-83e8f744c324.png?v=1784719423</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
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  <url>
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      <image:caption>Maintenance Kit for SP-510 Hardness Monitor</image:caption>
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  <url>
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      <image:caption>IntelliCAL ISENH3181 Ammonia Ion Selective Electrode (ISE) Replacement Membranes, pack of 3</image:caption>
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  <url>
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      <image:caption>Protective Shroud Kit for Standard IntelliCAL LDO Probes, HACH, 5832500</image:caption>
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  <url>
    <loc>https://preiser.com/products/sodium-persulfate-solution-0-6-molar-sold-by-each-each-5-gal-non-regulated</loc>
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  </url>
  <url>
    <loc>https://preiser.com/products/phosphoric-acid-solution-0-6-molar-5-gal-8-un1805-p-g-iii</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
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      <image:caption>Phosphoric Acid Solution, 0.6 Molar, 5 Gal., (8, UN1805, P.G. III)</image:caption>
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  </url>
  <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>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
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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>
  <url>
    <loc>https://preiser.com/products/dpd-oxalate-analytical-grade-25-g-hach-608424</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
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      <image:caption>DPD Oxalate, Analytical Grade, 25 g, HACH, 608424</image:caption>
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  </url>
  <url>
    <loc>https://preiser.com/products/spoon-measuring-0-2-gram-capacity</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
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      <image:caption>Spoon, Measuring, 0.2 Gram Capacity</image:caption>
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  <url>
    <loc>https://preiser.com/products/spoon-measuring-0-2-g-capacity-hach-63800</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
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      <image:caption>Spoon, Measuring, 0.2 g Capacity, HACH, 63800</image:caption>
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  </url>
  <url>
    <loc>https://preiser.com/products/maintenance-kit-for-hach-5500sc-silica-2-4-channel-analyzers</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
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      <image:title>Maintenance Kit for HACH 5500sc Silica 2/4 Channel Analyzers</image:title>
      <image:caption>Maintenance Kit for HACH 5500sc Silica 2/4 Channel Analyzers</image:caption>
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  </url>
  <url>
    <loc>https://preiser.com/products/sulfite-3-reagent-100-ml-mdb-hach-70532</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-705-32.png?v=1784719441</image:loc>
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      <image:caption>Sulfite 3 Reagent, 100 mL MDB, HACH, 70532</image:caption>
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  </url>
  <url>
    <loc>https://preiser.com/products/hach-manver-2-hardness-indicator-powder-pillows-50-ml-sample-100-pk-85199</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
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      <image:caption>HACH ManVer 2 Hardness Indicator Powder Pillows, 50 mL Sample, 100/PK, 85199</image:caption>
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  <url>
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      <image:caption>CalVer® 2 Calcium Indicator Powder Pillows, 50 mL Sample, 100/PK</image:caption>
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  <url>
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      <image:caption>FerroVer Iron Reagent Powder Pillows, 25 mL, 1000/PK, 85428</image:caption>
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  </url>
  <url>
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      <image:caption>NEW Low Range Total Alkalinity Chemkey® Reagents, 25/Box, 8636200</image:caption>
    </image:image>
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  <url>
    <loc>https://preiser.com/products/low-range-hardness-chemkey%C2%AE-reagents-25-box-8636400</loc>
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      <image:caption>NEW Low Range Hardness Chemkey® Reagents, 25/Box, 8636400</image:caption>
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  <url>
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    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
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      <image:caption>NEW Low Range Orthophosphate Chemkey® Reagents, 25/Box, 8636600</image:caption>
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  </url>
  <url>
    <loc>https://preiser.com/products/ferrover-iron-reagent-powder-pillows-5-ml-sample-size-100-tests-pk-hach-92799</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
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      <image:caption>FerroVer Iron Reagent Powder Pillows, 5 mL Sample Size, 100 Tests/PK, HACH, 92799</image:caption>
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  </url>
  <url>
    <loc>https://preiser.com/products/phenolphthalein-indicator-powder-pillows-100-pk-hach-94299</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
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  </url>
  <url>
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      <image:caption>Phenolphthalein Indicator Powder Pillows, 100/PK</image:caption>
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  </url>
  <url>
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    <changefreq>daily</changefreq>
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      <image:caption>Bromcresol Green-Methyl Red Indicator Powder Pillows, 100/PK</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/calcium-indicator-calver-2-powder-pillows-package-of-100-pillows</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
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      <image:caption>Calcium Indicator, CalVer 2, Powder Pillows (Package of 100 Pillows)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/pocket-pro-multi-2-tester-for-ph-cond-tds-salinity-with-replaceable-sensor-9532800</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
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  </url>
  <url>
    <loc>https://preiser.com/products/univer-3-hardness-reagent-powder-pillows-100-pk-hach-96299</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
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      <image:caption>UniVer 3 Hardness Reagent Powder Pillows, 100/PK, HACH, 96299</image:caption>
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  </url>
  <url>
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    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
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      <image:caption>Sodium Periodate Powder Pillows for Manganese, 25 mL, 100/PK, HACH, 98499</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/dr1900-portable-spectrophotometer-hach-dr1900-01h</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
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      <image:title>DR1900 Portable Spectrophotometer, HACH, DR1900-01H</image:title>
      <image:caption>DR1900 Portable Spectrophotometer, HACH, DR1900-01H</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/intellical-lbod101-luminescent-optical-dissolved-oxygen-ldo-sensor-for-bod-measurements-1-m-cable</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
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      <image:caption>Intellical LBOD101 Luminescent/Optical Dissolved Oxygen (LDO) Sensor for BOD Measurements, 1 m Cable</image:caption>
    </image:image>
  </url>
  <url>
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    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
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      <image:title>IntelliCAL LDO101 Field Luminescent/Optical Dissolved Oxygen (DO) Sensor, 5 m Cable, HACH, LDO10105</image:title>
      <image:caption>IntelliCAL LDO101 Field Luminescent/Optical Dissolved Oxygen (DO) Sensor, 5 m Cable, HACH, LDO10105</image:caption>
    </image:image>
  </url>
  <url>
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    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
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      <image:caption>Operator RFID Tags, 2/PK, HACH, LZQ066</image:caption>
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  </url>
  <url>
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      <image:caption>Pour-Thru Cell Kit for DR3900 and DR1900, HACH, LZV899</image:caption>
    </image:image>
  </url>
  <url>
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    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
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      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-LZW9509_99_a54efa0d-dc7a-48c7-baa6-73a8b795d6b0.png?v=1784719479</image:loc>
      <image:title>Electrolyte Solution (3 M KCL), 50 mL Bottle</image:title>
      <image:caption>Electrolyte Solution (3 M KCL), 50 mL Bottle</image:caption>
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    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
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      <image:title>Replacement Vial for TU5300sc and TU5400sc Online Laser Turbidimeter, HACH, LZY834</image:title>
      <image:caption>Replacement Vial for TU5300sc and TU5400sc Online Laser Turbidimeter, HACH, LZY834</image:caption>
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      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-LZY835.png?v=1784719483</image:loc>
      <image:title>Stablcal Primary Standards Set with RFID (10 NTU, 20 NTU, 600 NTU), for TU5200, TU5300sc, and TU5400sc Laser Turbidimeters, HACH, LZY835</image:title>
      <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>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/manual-vial-wiper-for-tu5200-tu5300sc-and-tu5400sc-laser-turbidimeters-hach-lzy903</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-LZY903.png?v=1784719485</image:loc>
      <image:title>Manual Vial Wiper for TU5200, TU5300sc, and TU5400sc Laser Turbidimeters, HACH, LZY903</image:title>
      <image:caption>Manual Vial Wiper for TU5200, TU5300sc, and TU5400sc Laser Turbidimeters, HACH, LZY903</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/2-in-pvc-union-mounting-tee-for-1-5-inch-ph-orp-sensors-hach-mh578n9a</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-MH578N9A.png?v=1784719486</image:loc>
      <image:title>2 in. PVC Union Mounting Tee, For 1.5 inch pH/ORP Sensors, HACH MH578N9A</image:title>
      <image:caption>2 in. PVC Union Mounting Tee, For 1.5 inch pH/ORP Sensors, HACH MH578N9A</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/2-pvc-union-mounting-tee-only-for-1-5-inch-ph-orp-sensors-no-junction-box-hach-mh578n9az</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-MH578N9AZ.png?v=1784719488</image:loc>
      <image:title>2&quot; PVC Union Mounting Tee Only, for 1.5 inch pH/ORP Sensors, No Junction Box, HACH, MH578N9AZ</image:title>
      <image:caption>2&quot; PVC Union Mounting Tee Only, for 1.5 inch pH/ORP Sensors, No Junction Box, HACH, MH578N9AZ</image:caption>
    </image:image>
  </url>
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    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-PHC10103.png?v=1784719491</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>
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    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-TNT822.png?v=1784719493</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-TNT845.png?v=1784719499</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-TNT860.png?v=1784719501</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-TNT867_2d93a6ac-fdd5-44bf-8259-444ee36dc9f9.png?v=1784719507</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-TNT869.png?v=1784719510</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-TNT870.png?v=1784719513</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-TNT872_ac941e3b-b71d-44cf-b2ef-ff0cb06c2b03.png?v=1785287155</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-TNT878_6dbe4f91-200f-4976-9edc-06eb9ffa6c63.png?v=1784719518</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-TNT879.png?v=1784719520</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAH-TNT880.png?v=1784719523</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAN-HI1217D.png?v=1784719524</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAN-HI1280_48eec3ab-ff3b-4e98-aa21-df6971750b3a.png?v=1784719525</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAN-HI1285-6.png?v=1784719527</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAN-HI1288.png?v=1784719528</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAN-HI1618D.png?v=1784719530</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAN-HI38001.png?v=1784719535</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAN-HI3817BP.png?v=1784719536</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAN-HI3859.png?v=1784719541</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>
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    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAN-HI3896BP.png?v=1784719548</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>
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    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAN-HI7004L.png?v=1784719550</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAN-HI7007L.png?v=1784719551</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAN-HI7010L.png?v=1784719553</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAN-HI7021L.png?v=1784719554</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAN-HI7021M.png?v=1784719556</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAN-HI7022M_0889a17f-d0e0-4534-9088-b236d49ec80b.png?v=1784719557</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAN-HI7041L_3f9168a8-6355-4986-ad33-df118a4c18b5.png?v=1784719559</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>
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    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HAN-HI7041M_7b2fcc8b-c6ec-40b5-b4c2-3bd64a9a0f8e.png?v=1784719561</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>
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    <image:image>
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      <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>
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      <image:caption>Shockproof Rubber Boot, Orange for HI9819x Meters, Hanna Instruments, HI710034</image:caption>
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    <image:image>
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      <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>
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      <image:title>Graduated Syringe Set, 1 mL, 10/PK, Hanna Instruments, HI74042P</image:title>
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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:caption>Conductivity (EC) Sensor for HI769828 Probe, for HI9828 Series Meters, Hanna Instruments, HI769828-3</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:caption>NEW 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:caption>Portable Plating pH  Meter Kit, with Electrode, DIN Connector, Hanna Instruments, HI99131</image:caption>
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    <image:image>
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      <image:caption>Automatic Water Control Device, Hands Free, Motion Detecting Water Faucet Operation, Hands Free Corporation, WTS-1A1</image:caption>
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  <url>
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      <image:caption>Cuvettes, Disposable with Caps, For Pocket Photometer, 100/PK, HF Scientific, 10431 (IMAGE SHOWN IS ENTIRE PHOTOMETER KIT)</image:caption>
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      <image:caption>DPD Pop Dispenser, Chlorine-Free, 10 mL, 400 Tests, For Test Kits Using Tablet Technology</image:caption>
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  <url>
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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>
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      <image:caption>Chlorine Pocket Photometer, EPA Approved Method</image:caption>
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  <url>
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    <changefreq>daily</changefreq>
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      <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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  <url>
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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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  <url>
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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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  <url>
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      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HFS-10504C.png?v=1784719647</image:loc>
      <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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  </url>
  <url>
    <loc>https://preiser.com/products/ppd-2-dispenser-for-total-chlorine-10-ml-samples-use-with-hanna-or-hach-photometer-100-tests</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HFS-10506.png?v=1784719649</image:loc>
      <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>
    <loc>https://preiser.com/products/ppd-2-dispenser-for-total-chlorine-10-ml-samples-use-with-hanna-or-hach-photometer-1000-tests</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
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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>
  <url>
    <loc>https://preiser.com/products/micro-100-laboratory-turbidimeter-0-1000-ntu-120-v-60-hz-hf-scientific-20001</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
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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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  </url>
  <url>
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    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
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      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HFS-29825.png?v=1784719653</image:loc>
      <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>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/sample-cuvette-28-x-70-mm-replaces-28-x-93-mm-use-for-grab-sample-includes-ten-threaded-light-shield-caps-package-of-10</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
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      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HFS-50052.png?v=1784719656</image:loc>
      <image:title>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:title>
      <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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  <url>
    <loc>https://preiser.com/products/lamp-source-with-2-leads-for-hf-scientific-turbidimeter-2-pk</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HFS-50096.png?v=1784719658</image:loc>
      <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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  <url>
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    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HNA-FC200B.png?v=1784719659</image:loc>
      <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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    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HNA-FC202D.png?v=1784719660</image:loc>
      <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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    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HNA-HI1053B.png?v=1784719662</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>
    </image:image>
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  <url>
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    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HNA-HI1053P.png?v=1784719664</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>
    </image:image>
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  <url>
    <loc>https://preiser.com/products/mini-stirrer-magnetic-stainless-steel-cover-110-115-vac-4-8-x-4-8-x-1-8-in-hanna-instruments-hi200m-1</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <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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    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <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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  <url>
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    <changefreq>daily</changefreq>
    <image:image>
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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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  <url>
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      <image:title>Ammonia ISE Conditioning and Storage Solution, Hanna Instruments, HI4001-45</image:title>
      <image:caption>Ammonia ISE Conditioning and Storage Solution, Hanna Instruments, HI4001-45</image:caption>
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  <url>
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    <changefreq>daily</changefreq>
    <image:image>
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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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  <url>
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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>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/nitrate-ise-1000-ppm-standard-hanna-instruments-hi4013-03</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HNA-HI4013-03.png?v=1784719686</image:loc>
      <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>
  </url>
  <url>
    <loc>https://preiser.com/products/ammonia-combination-ion-selective-electrode-ise-hanna-instruments-hi4101</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HNA-HI4101_be28ef63-df7d-43eb-a40c-37d538cc2b9e.png?v=1784719688</image:loc>
      <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>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/nitrate-combination-ion-selective-electrode-ise-hanna-instruments-hi4113</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HNA-HI4113.png?v=1784719689</image:loc>
      <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>
  <url>
    <loc>https://preiser.com/products/ph-3-00-buffer-technical-grade-500-ml-bottle-hanna-instruments-hi5003</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HNA-HI5003_03d28dcd-0c02-4fd5-a2b6-01fa14671234.png?v=1784719691</image:loc>
      <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>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/1413-%C2%B5s-cm-conductivity-standard-w-coa-25-x-20-ml-hanna-instruments-hi70031c</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HNA-HI70031C.png?v=1784719693</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HNA-HI70300M.png?v=1784719695</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HNA-HI70635L.png?v=1784719697</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HNA-HI7074L.png?v=1784719699</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HNA-HI7078.png?v=1784719701</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HNA-HI710005.png?v=1784719702</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HNA-HI731325.png?v=1784719704</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HNA-HI731342.png?v=1784719706</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HNA-HI731352.png?v=1784719707</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HNA-HI740226.png?v=1784719708</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>
    <loc>https://preiser.com/products/thermosistor-probe-general-purpose-white-handle-1-m-cable-up-to-150-degrees-c-hanna-instruments-hi762pw</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HNA-HI762PW.png?v=1784719710</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HNA-HI76404N_28e18101-deeb-4716-a862-f86e58e3b586.png?v=1784719711</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HNA-HI7669_2.png?v=1784719713</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>
    <loc>https://preiser.com/products/thermocouple-probe-k-type-penetration-and-1-m-cable-up-to-900-degrees-c-hanna-instruments-hi766c</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HNA-HI766C.png?v=1784719714</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>
    <loc>https://preiser.com/products/thermocouple-probe-k-type-extended-length-with-handle-and-1-m-cable-up-to-900-degrees-c-hanna-instruments-hi766e2</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HNA-HI766E2_ad42f1d2-eb2d-42e9-bc49-b83abd76ce0d.png?v=1784719715</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>
    <loc>https://preiser.com/products/thermocouple-probe-k-type-extended-length-3-3-ft-penetration-and-1-m-cable-up-to-250-degrees-c-hanna-instruments-hi766tr2</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HNA-HI766TR2.png?v=1784719716</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HNA-HI935005.png?v=1784719718</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>
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    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HNA-HI93530.png?v=1784719719</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HNA-HI93706-03_a44f8f1d-44f3-43a4-b48b-29813d49aa34.png?v=1784719722</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HNA-HI93715-01_9b36edc5-5336-4221-beb0-7686eea23c03.png?v=1784719724</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>
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    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HNA-HI93721-03.png?v=1784719727</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>
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    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HNA-HI93732-01.png?v=1784719730</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HNA-HI96707.png?v=1784719731</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HNT-047209.png?v=1784719733</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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    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HOL-800-3A.png?v=1784719735</image:loc>
      <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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  <url>
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    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HOL-800-3C.png?v=1784719737</image:loc>
      <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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  <url>
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    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HOL-800-8.png?v=1784719738</image:loc>
      <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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  <url>
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    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/HOL-800-9.png?v=1784719740</image:loc>
      <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: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>
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      <image:caption>Bunsen Round Jaw Extension Clamp, Large Jaw Model</image:caption>
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  <url>
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  <url>
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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>
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      <image:caption>Kimax Filter Chemical Funnel, 125 mm, Legacy</image:caption>
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  <url>
    <loc>https://preiser.com/products/ken-a-vision-1985-monocular-microscope</loc>
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      <image:caption>Ken-A-Vision Model MSC Binocular Microscope</image:caption>
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  <url>
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      <image:caption>WYPALL X70 Wiper, 9.1 x 16.8 in., Blue, 100 Wipers/Box</image:caption>
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  <url>
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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>
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  <url>
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    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
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      <image:caption>Liquid-in-Glass Thermometer, Fractional Degree Precision Laboratory Thermometer, -10 to 80 degrees C</image:caption>
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  </url>
  <url>
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    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
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      <image:caption>Microfiltration Funnel with Stainless Steel Support, 47 mm Diameter Support</image:caption>
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    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
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    <loc>https://preiser.com/products/glass-bottle-used-for-water-sampling-60-ml-lamotte-0688-do</loc>
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  <url>
    <loc>https://preiser.com/products/measuring-spoon-0-05-g</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
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      <image:caption>Measuring Spoon, 0.05 g</image:caption>
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  <url>
    <loc>https://preiser.com/products/turbidity-standard-250-ntu-amco-60-ml</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
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      <image:caption>Turbidity Standard, 250 NTU Amco, 60 mL</image:caption>
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  <url>
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  <url>
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      <image:caption>SMART (Registered) Spectro Spectrophotometer, 350-1000 nm, Over 80 Pre-Programmed Tests Included</image:caption>
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  <url>
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      <image:caption>DPD Chlorine Secondary Standards Kit, for Model 1200 Colorimeter.</image:caption>
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  <url>
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      <image:caption>Chlorine DPD # 3R Tablets (Package of 50)</image:caption>
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      <image:caption>Chlorine DPD # 1R Tablets, 50/PK, LaMotte, 6999A-H</image:caption>
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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>
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    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
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      <image:caption>Dissolved Oxygen Kit Refill</image:caption>
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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>Isopropyl Alcohol, AR (ACS), 20 L Steel Pail, Mallinckrodt 3032-22 (3, UN1219, P.G. II)</image:caption>
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      <image:caption>Ammonium Chloride, 2.5 kg, Avantor Performance Materials</image:caption>
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      <image:caption>Ammonium Chloride, Macron, &gt;/=99.5%, Crystals, AR, ACS, 500 g, Avantor Performance Materials, 3384-12</image:caption>
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      <image:caption>Chloroform AR(ACS), General Line Reagent Solvent, 4 L Amber Glass Bottle, Mallinckrodt 4440-08 (6.1, UN1888, P.G. III)</image:caption>
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      <image:caption>Reagent Alcohol, Absolute, AR (ACS), 4 L Poly Bottle, Mallinckrodt 7019-10 (3, UN1987, P.G. II)</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/MCW-7824-04_2f82f162-daf8-421e-ad18-17aec12a09a7.png?v=1784719954</image:loc>
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      <image:caption>Toluene Reagent, 200 L, Avantor Performance Materials, 8608-26, 3, UN1294, PGIII</image:caption>
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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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      <image:caption>Hexadecane, 99.0% (Sold by Each / Each = 100 gram Glass Bottle) (Non-Regulated)</image:caption>
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  <url>
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      <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>
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      <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>
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  <url>
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  <url>
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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>
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  <url>
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      <image:caption>pH Combination Electrode, DG115-SC, Glass Body, Mettler Toledo, 89806</image:caption>
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      <image:caption>MCE Membrane Filter 0.45 um White Plain 102 mm Nonsterile 25/Pk, Advantec MFS, Inc, A045A102C</image:caption>
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      <image:caption>Quartz Fiber Filter QR100 Grade 85 Wt 21 mm 100/Pk, Advantec MFS, Inc, QR10021MM</image:caption>
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      <image:caption>MG-1000 MicroGripper Tips, 5.0 mils x 2 in. Tip Diameter, 2.5 thickness</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/mg-1000-microgripper-assembly-750-controller-and-gripper-tips-as-well-as-micro-manipulator-if-required-must-be-purchased-separately</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/MFT-MG1000.png?v=1784720002</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>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/m-2-mg-1000-micro-manipulator</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/MFT-MMD10P.png?v=1784720003</image:loc>
      <image:title>M-2 / MG-1000 Micro-Manipulator</image:title>
      <image:caption>M-2 / MG-1000 Micro-Manipulator</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/mg-1000-microgripper-tips-1-5-mils-x-1-in-tip-diameter-2-5-thickness</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/MFTGT125-1_5_22cd1e9b-2f3f-44bf-95a1-6238ef56d38f.png?v=1784720004</image:loc>
      <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>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/microgripper-assembly-controller-grippers-as-well-as-micro-manipulator-if-required-must-be-purchased-separately</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/MG-M-2.png?v=1784720006</image:loc>
      <image:title>Microgripper Assembly (Controller &amp; Grippers, as Well as Micro-Manipulator if Required, Must be Purchased Separately)</image:title>
      <image:caption>Microgripper Assembly (Controller &amp; Grippers, as Well as Micro-Manipulator if Required, Must be Purchased Separately)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/m-2-controller-manual-with-variable-speed-control-120-v-50-60-hz</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/MG-MC2.png?v=1784720007</image:loc>
      <image:title>M-2 Controller, Manual with Variable Speed Control, 120 V, 50/60 Hz</image:title>
      <image:caption>M-2 Controller, Manual with Variable Speed Control, 120 V, 50/60 Hz</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/m-2-microgripper-tips-4-to-17-cylinder-size-gripped-10-mils-thickness-5x17</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/MG-ST-201.png?v=1784720008</image:loc>
      <image:title>M-2 Microgripper Tips, 4 to 17 Cylinder Size Gripped, 10 mils Thickness, 5x17</image:title>
      <image:caption>M-2 Microgripper Tips, 4 to 17 Cylinder Size Gripped, 10 mils Thickness, 5x17</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/m-2-microgripper-tips-8-to-15-cylinder-size-gripped-20-mils-thickness-10x36</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/MG-ST-203.png?v=1784720010</image:loc>
      <image:title>M-2 Microgripper Tips, 8 to 15 Cylinder Size Gripped, 20 mils Thickness, 10x36</image:title>
      <image:caption>M-2 Microgripper Tips, 8 to 15 Cylinder Size Gripped, 20 mils Thickness, 10x36</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/m-2-microgripper-tips-straight-tips-10-mils-thickness-2x20</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/MG-ST101.png?v=1784720011</image:loc>
      <image:title>M-2 Microgripper Tips, Straight Tips, 10 mils Thickness, 2x20</image:title>
      <image:caption>M-2 Microgripper Tips, Straight Tips, 10 mils Thickness, 2x20</image:caption>
    </image:image>
  </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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/MIF-EV2050-L_d3a5a3d2-4ec4-4e46-b606-3d8b73989a23.png?v=1784720013</image:loc>
      <image:title>MICROFLEX Evolution One EV-2050 Powder Free Latex Gloves, Large, 100/PK, Ansell, EV-2050-L</image:title>
      <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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/MIF-EV2050-S.png?v=1784720014</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/MIF-EV2050-XL_b59e18e4-165d-4ddc-948f-1df96813cffd.png?v=1784720016</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>
    <loc>https://preiser.com/products/glove-microflex-synetron-registered-powder-free-latex-large-50-pk-10pk-cs-insource-sy911-lg</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/MIF-SY911-LG.png?v=1784720017</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>
    <loc>https://preiser.com/products/glove-microflex-synetron-registered-powder-free-latex-medium-50-pk-10pk-cs-insource-sy911-m</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/MIF-SY911-M.png?v=1784720018</image:loc>
      <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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/MIF-SY911-S.png?v=1784720020</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/MIF-SY911-XL_b1a1d962-5ca8-4061-9778-00f57283bc15.png?v=1784720021</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/MIL-AP4004705.png?v=1784720022</image:loc>
      <image:title>Glass Prefilter, 47 mm, without binders (Package of 500)</image:title>
      <image:caption>Glass Prefilter, 47 mm, without binders (Package of 500)</image:caption>
    </image:image>
  </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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/MIL-HAWP4700_3e8fade0-1b1d-40e5-bdd7-f21b92e70479.png?v=1784720024</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/MIL-MIHAWG100.png?v=1784720025</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/MIL-MPGP04001_5c09b71a-db95-422d-8be2-14e26fba4e51.png?v=1784720026</image:loc>
      <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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/MIL-PD10047S0.png?v=1784720028</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/MIL-SSWP04700.png?v=1784720029</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/MIL-TANKMPK03.png?v=1784720030</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/MIL-VMWP04700_e78d3e87-2aca-4f83-b12f-7b7096fe4bd4.png?v=1784720032</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/MJI-MA326_17cca534-a29f-49c6-ad65-d55e63c548b6.png?v=1784720034</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/MJI-MA457.png?v=1784720036</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/MJI-MA504.png?v=1784720037</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/MJI-MA602_5cd250b2-e4b5-4552-b4c7-c94c385ef516.png?v=1784720038</image:loc>
      <image:title>Binocular Microscope Body, Meiji Techno America, MA602</image:title>
      <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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/MJI-MA749_0a90d81a-195d-4bb5-8d5f-c0a65c0f9465.png?v=1784720040</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/MJI-ML2000X.png?v=1784720041</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/MJI-ML2955.png?v=1784720043</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/MJI-MLASB.png?v=1784720044</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/MJI-RMTHPH_01.png?v=1784720045</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/MLA-1026.png?v=1784720047</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/MMC-3283K5.png?v=1784720048</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/MON-77303-01.png?v=1784720051</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/MYR-6-P.png?v=1784720052</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/MYR-RPR.png?v=1784720054</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/MYR-SS-q.png?v=1784720055</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/MYR-TP1.png?v=1784720056</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/MYY-335942-000.png?v=1784720058</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/NAC-500NCW100_88.png?v=1784720059</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/NAL-11100-0200.png?v=1784720061</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/NAL-142000015.png?v=1784720062</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/NAL-155-0020.png?v=1784720063</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/NAL-16300-0016.png?v=1784720064</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/NAL-189-2000.png?v=1784720066</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/NAL-205-4045.png?v=1784720067</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/NAL-2097-0050.png?v=1784720069</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/NAL-2099-0001.png?v=1784720070</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/NAL-2099-0002_39f48469-641e-4245-9ee0-9929514c82fc.png?v=1784720071</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/NAL-20990008_e6838d4e-53e2-4b0d-bc3d-ae2596fe08fb.png?v=1784720073</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/NAL-21152000.png?v=1784720075</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/NAL-21180002_8fc45a4b-7c8a-48ae-bdfe-51aa5217c274.png?v=1784720076</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/NAL-2205-0032.png?v=1784720077</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/NAL-22420025_d04f1efb-335c-4e00-8ea2-1a00aa3e510c.png?v=1784720079</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/NAL-2407-1000_4c344228-bb8c-4763-a654-7838f8d0e5c4.png?v=1784720080</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/NAL-24070500.png?v=1784720081</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/NAL-312087-0001.png?v=1784720083</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/NAL-312104-0032_75eb063c-19ae-4c29-ae1c-52c1fdce4bcf.png?v=1784720084</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/NAL-342089-0032.png?v=1784720085</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>
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      <image:caption>Nasco Sampling LLC Sampler, Nabber, with 4 to 6.5 Ft Adjustable Aluminum Pole and 500 mL Bottle, B01229</image:caption>
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      <image:caption>Coal Fly Ash Standard 10 Grams</image:caption>
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      <image:caption>Micrometer          (SPECIAL PRICING NOW AVAILABLE)</image:caption>
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      <image:caption>Drive Belt, Neoprene, 0.139 in. x 15-11/16 in., for Parr Plain Jacket Calorimeters, Parr Instruments, 37M2</image:caption>
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      <image:caption>PAR-4520 Series Bench Top Reactors by Parr Instruments, 1 - 2 L, 1900 psi</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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      <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>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: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>
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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>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:title>Replacement PTFE Cup with Cover, 45 mL for Use with PAR-4744 Acid Digestion Vessel, Parr Instruments, A280AC2</image:title>
      <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:image>
  </url>
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    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
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  </url>
  <url>
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    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PAR-PDM_454338b2-5be9-4eba-af54-94a3806f231b.png?v=1784720246</image:loc>
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      <image:caption>Pressure Display Module, Expansion Module with Transducer for Parr 4838 Reactor Controller, Parr Instrument, PDM</image:caption>
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  </url>
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      <image:caption>Socket Head Screw, Parr Instrument Company, SC1332SC03</image:caption>
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  </url>
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      <image:caption>Hinge, Friction Black 20 lb, Parr Instrument, 1237DD2</image:caption>
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      <image:caption>Cable, Backlight Inverter, Parr Instrument, A1806E</image:caption>
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  </url>
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      <image:caption>Allen Wrench, 9/64 Socket Screw Key, Parr Instrument, TX14SK</image:caption>
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    <changefreq>daily</changefreq>
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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>
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    <image:image>
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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>
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    <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>
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    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIA-10070-1.png?v=1784720264</image:loc>
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      <image:caption>Acetate Buffer pH 6.0, for Aluminum, LabChem, LC100701</image:caption>
    </image:image>
  </url>
  <url>
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    <changefreq>daily</changefreq>
    <image:image>
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      <image:caption>Acetic Acid, 3% V/V (1+19) Poly Bottle, 1 L,  Traceable to NIST  (Non-Regulated)</image:caption>
    </image:image>
  </url>
  <url>
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    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
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      <image:caption>Alkaline Iodide Solution, for Dissolved Oxygen, 1 L Bottle, LC106402 (8, UN1824, P.G II)</image:caption>
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  <url>
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    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
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    <image:image>
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      <image:caption>Alkaline Iodide Azide Solution I for Dissolved Oxygen, 1 L Amber Poly Bottle, LC106702 (8, UN1824, P.G. II)</image:caption>
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  </url>
  <url>
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    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIA-1080-52_d2ba2685-5f38-41b7-8abe-6f082bc1d39c.png?v=1784720272</image:loc>
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      <image:caption>Acetone Technical (Sold by Each / Each = 357 lb Drum) (3, UN1090, P.G. II)</image:caption>
    </image:image>
  </url>
  <url>
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    <changefreq>daily</changefreq>
    <image:image>
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      <image:caption>Amine-Sulfuric Acid Reagent for Sulfide, 500 mL Amber Glass Bottle, LC108801 (8, UN1830, P.G. II)</image:caption>
    </image:image>
  </url>
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    <changefreq>daily</changefreq>
    <image:image>
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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>
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    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
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      <image:caption>Ammonium Acetate Buffer, for Iron, 1 L, LabChem, LC109702</image:caption>
    </image:image>
  </url>
  <url>
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    <changefreq>daily</changefreq>
    <image:image>
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      <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>
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  </url>
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    <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>
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    <changefreq>daily</changefreq>
    <image:image>
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      <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>
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    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIA-17940-7.png?v=1784720285</image:loc>
      <image:title>Ammonia (As Nitrogen) Standard, 1000 ppm, 1 mL = 1 mg N, 1 mL = 1.22 mg NH3), 125 mL, LabChem, LC179407</image:title>
      <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>
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    <changefreq>daily</changefreq>
    <image:image>
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      <image:caption>Boric Acid, Granular, Technical Grade, 55.00 lb, 13400-BAG</image:caption>
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    <changefreq>daily</changefreq>
    <image:image>
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      <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>
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    <changefreq>daily</changefreq>
    <image:image>
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      <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>
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    <changefreq>daily</changefreq>
    <image:image>
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      <image:title>Boric Acid, 2%, 4L, LC117204</image:title>
      <image:caption>Boric Acid, 2%, 4L, LC117204</image:caption>
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    <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>
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    <changefreq>daily</changefreq>
    <image:image>
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      <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>
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    <changefreq>daily</changefreq>
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      <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>
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    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIB-11850-7.png?v=1784720300</image:loc>
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      <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>
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    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIB-11870-1.png?v=1784720302</image:loc>
      <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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIB-12000-1.png?v=1784720305</image:loc>
      <image:title>LabChem Bromine Water, Saturated, 500mL</image:title>
      <image:caption>LabChem Bromine Water, Saturated, 500mL</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/bromophenol-blue-0-04-aqueous-ph-3-0-to-4-6-yellow-to-blue-500-ml-poly-bottle-lc120201-non-regulated</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIB-12020-1_48e6a531-1742-423f-bed1-fba3842e4d32.png?v=1784720307</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>
    <loc>https://preiser.com/products/bromophenol-blue-0-1-aqueous-ph-3-0-4-6-yellow-to-blue-500-ml-labchem-lc120301</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIB-12030-1.png?v=1784720309</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIB-12050-1_044e6220-a461-4a87-9aff-5b33b0ada682.png?v=1784720311</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIB-12050-7.png?v=1784720313</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIB-12350-1.png?v=1784720317</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIB-12350-4.png?v=1784720320</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIB-12350-6_5c5e7f8b-7d29-4409-b83f-979b37dc9240.png?v=1784720323</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIB-12420-4.png?v=1785287167</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIB-12450-4.png?v=1784720327</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIB-12560-1.png?v=1784720331</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIB-16900-1.png?v=1784720334</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIB-16900-2_4c220bda-4433-4f54-8ac6-f5059d83abe5.png?v=1784720336</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIC-12650-1.png?v=1784720338</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIC-12700-1.png?v=1784720339</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIC-12730-1.png?v=1784720341</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIC-12730-2_b468225f-8547-401a-a68d-85d527c95e7e.png?v=1785287168</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIC-12850-1.png?v=1784720346</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIC-12910-1.png?v=1784720348</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIC-12930-4.png?v=1784720349</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIC-13000-1.png?v=1784923725</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIC-13010-2.png?v=1784720353</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIC-13120-1.png?v=1784923727</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIC-13230-1.png?v=1784720357</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIC-13240-1.png?v=1784720359</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIC-13245-1.png?v=1784720361</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIC-13400-1_6f8c987c-ef7a-45af-a588-608f21bb1171.png?v=1784720363</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIC-13440-4_78061bfc-9d43-41f7-93b0-f953747b406f.png?v=1784720365</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIC-13545-7_407b6efc-a991-4d3c-8de0-2cd9816c7ab1.png?v=1784720367</image:loc>
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      <image:caption>Distilled Water, 1 gallon (Non-Regulated)</image:caption>
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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>Eriochrome Black T in Methoxyethanol, 125 mL Amber Glass Bottle, LC140407 (3, UN1188, P.G. III)</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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  </url>
  <url>
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  </url>
  <url>
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      <image:caption>Ferroin Oxidation-Reduction Indicator, 125 mL Amber Glass Bottle, LC144507 (Non-Regulated)</image:caption>
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  <url>
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      <image:caption>Fluoride Standard, 0.5 ppm F- Premixed with Equal Volume of TISAB II, 500 mL, LabChem, LC146101</image:caption>
    </image:image>
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  <url>
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    <image:image>
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      <image:caption>Formaldehyde, 37% w/w, ACS, 500 mL, LC146501 (3, UN1198, P.G. III)</image:caption>
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    <image:image>
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      <image:caption>Formaldehyde, 37% w/w, ACS Grade, 4 L, LabChem, LC146504</image:caption>
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  </url>
  <url>
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    <image:image>
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      <image:caption>Formaldehyde, 37% w/w, ACS Grade, 20 L Cubitainer, LabChem, LC146505</image:caption>
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  </url>
  <url>
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    <image:image>
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      <image:caption>Formaldehyde, 10% v/v, Unbuffered (Formalin), 1 L Poly Bottle, Labchem, LC146602</image:caption>
    </image:image>
  </url>
  <url>
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    <image:image>
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      <image:caption>Formaldehyde, 10% v/v, Buffered (Formalin), 20 L, Cubitainer, Labchem, LC146705</image:caption>
    </image:image>
  </url>
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    <image:image>
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      <image:caption>Dye, Bright Standard Blue Water Tracer Liquid, 1 gal,</image:caption>
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  <url>
    <loc>https://preiser.com/products/dye-water-tracer-bright-standard-blue-powder-1-lb-ea-105002</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
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    <image:image>
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      <image:caption>Dye, Water Tracer, Bright Standard Blue Powder, 1 lb EA, 105002</image:caption>
    </image:image>
  </url>
  <url>
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    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
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      <image:caption>Dye, Bright Fluorescent FWT Red 50, Water Tracer, 1 gal, 106053-01G</image:caption>
    </image:image>
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    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
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      <image:caption>Dye, Bright Water Tracer FWT Red Powder, 1 lb, 105403</image:caption>
    </image:image>
  </url>
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    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
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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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    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIF-5140-52_c16afa7d-d563-4165-bbd1-6f2d68ae7024.png?v=1784720461</image:loc>
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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>
  </url>
  <url>
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    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
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      <image:title>Fluorescein, Disodium Salt (Dye) (Package of 500 Grams) (Non-Regulated)</image:title>
      <image:caption>Fluorescein, Disodium Salt (Dye) (Package of 500 Grams) (Non-Regulated)</image:caption>
    </image:image>
  </url>
  <url>
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    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIF-5180300101.png?v=1784720464</image:loc>
      <image:title>Potassium Iodide Tablets (Non-Regulated)</image:title>
      <image:caption>Potassium Iodide Tablets (Non-Regulated)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/glucose-glutamic-acid-sold-by-pack-pack-24-6-ml-amber-glass-vial-non-regulated</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIG-14845-246_8963ea8b-8bea-4c53-8b4a-d8b54ed1147c.png?v=1785287173</image: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>
  </url>
  <url>
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    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIG-25144-20_29c117f3-5ad6-4793-b8c0-2a5ef6512369.png?v=1784777991</image:loc>
      <image:title>HACH ez GGA-No Pipette GGA, Single Dose BOD Standard, 20/PK, 2 mL Ampules</image:title>
      <image:caption>HACH ez GGA-No Pipette GGA, Single Dose BOD Standard, 20/PK, 2 mL Ampules</image:caption>
    </image:image>
  </url>
  <url>
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    <image:image>
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      <image:caption>Hydrochloric Acid, 5% v/v (1+19), 1 L Poly Bottle, Traceable to NIST, LC150502</image:caption>
    </image:image>
  </url>
  <url>
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    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
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      <image:title>Hydrochloric Acid, 5% V/V (1+19), 4 L Poly Bottle, Traceable to NIST  (8, UN1789, P.G. II)</image:title>
      <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>
  </url>
  <url>
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    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
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      <image:caption>Hydrochloric Acid, 50% v/v, 1+1. 500 mL Amber Glass Bottle, LC151301</image:caption>
    </image:image>
  </url>
  <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>
  </url>
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    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
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      <image:title>Hydrochloric Acid 50% v/v (1+1), 4 L Amber Glass Bottle</image:title>
      <image:caption>Hydrochloric Acid 50% v/v (1+1), 4 L Amber Glass Bottle</image:caption>
    </image:image>
  </url>
  <url>
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    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
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      <image:caption>Hydrochloric Acid, 0.01 N (0.01 M), 1 L Poly Bottle, LabChem, LC151502</image:caption>
    </image:image>
  </url>
  <url>
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    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
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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>
    <loc>https://preiser.com/products/hydrochloric-acid-0-1-n-0-1-m-sold-by-each-each-poly-bottle-of-1-l-traceable-to-nist-non-regulated</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
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      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIH-15220-2_4317cc97-c8a1-41c8-849b-77e2a4b991a4.png?v=1784720486</image:loc>
      <image:title>Hydrochloric Acid, 0.1 N (0.1 M) (Sold by Each / Each = Poly Bottle of 1 L),  Traceable to NIST  (Non-Regulated)</image:title>
      <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>
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    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIH-15220-4_661cc64a-d6ae-4648-b6df-609332739913.png?v=1784720488</image:loc>
      <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>
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    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIH-15240-4_73771394-603b-4145-8dc4-1e3b82eafbb2.png?v=1784720490</image:loc>
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      <image:caption>Hydrochloric Acid, 0.2 N (0.2 M), 4 L, LabChem, LC152404</image:caption>
    </image:image>
  </url>
  <url>
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    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIH-15280-2.png?v=1784720492</image:loc>
      <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>
  </url>
  <url>
    <loc>https://preiser.com/products/hydrochloric-acid-0-5-n-0-5-m-4-l-labchem-lc152804</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIH-15280-4.png?v=1784720494</image:loc>
      <image:title>Hydrochloric Acid, 0.5 N (0.5 M), 4 L, LabChem, LC152804</image:title>
      <image:caption>Hydrochloric Acid, 0.5 N (0.5 M), 4 L, LabChem, LC152804</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-500-ml-traceable-to-nist-8-un1789-p-g-ii</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIH-15300-1_5980e813-6917-4844-a9ac-a2e95c03921e.png?v=1784720496</image:loc>
      <image:title>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:title>
      <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>
  </url>
  <url>
    <loc>https://preiser.com/products/hydrochloric-acid-1-0-n-1-0-m-1-l-poly-bottle</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIH-15300-2.png?v=1784720498</image:loc>
      <image:title>Hydrochloric Acid 1.0 N (1.0 M), 1 L Poly Bottle</image:title>
      <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>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIH-15300-4_1c9e1a19-7333-4d89-b828-07c7307ed28c.png?v=1784720500</image:loc>
      <image:title>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:title>
      <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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIH-15300-5.png?v=1785287177</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIH-15320-4.png?v=1784720504</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIH-15320-5_cc70a5c2-7747-4361-ba35-37e69b67ac4b.png?v=1784720505</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIH-15430-2.png?v=1784720509</image:loc>
      <image:title>Hydrogen Peroxide 30% w/w, 1 L Poly Bottle, Labchem, LC154302</image:title>
      <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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIH-15450-1.png?v=1784720511</image:loc>
      <image:title>Hydrogen Peroxide, 3%, 500 mL Poly Bottle, LC154501 (Non-Regulated)</image:title>
      <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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIH-15530-1.png?v=1784720512</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIH-175130-55.png?v=1784720514</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIH-25300-4_63b6cb6b-0c68-4883-b209-560e631a1268.png?v=1784720516</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIH-6102-20LT_b975dad2-903c-430a-ab98-74dc158a86e9.png?v=1784720518</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIH-925671.png?v=1784720520</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PII-15585-7.png?v=1784720522</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PII-15620-4.png?v=1784720523</image:loc>
      <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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PII-156302.png?v=1784720525</image:loc>
      <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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PII-15660-1.png?v=1784720526</image:loc>
      <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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PII-15660-2.png?v=1784720529</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PII-15660-4_c2c3157e-4722-4208-8ddb-3ede47b4e375.png?v=1784720530</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PII-15661-1.png?v=1784720532</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PII-15700-1.png?v=1784720534</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PII-15760-1_0e72edd6-4a46-4650-92c6-4edb8ecbc7f6.png?v=1784720536</image:loc>
      <image:title>Isopropyl Alcohol, 70% v/v (Made from ACS Grade), 500 mL Poly Bottle, LabChem, LC157601</image:title>
      <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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PII-15760-4.png?v=1784720538</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PII-26500-2_838d0820-5027-4707-acbe-f46f017c5a36.png?v=1784720540</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PII-6380-52.png?v=1785287179</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PII-6381-52_6c67acfa-f09b-4882-a819-037209746093.png?v=1784720544</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PII-6381-55.png?v=1784720546</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIL-16130-1_c1a3879d-184b-466d-8da6-c9be9b775c8f.png?v=1784923736</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIL-16150-7_ef56a8c2-c402-4d1e-82a0-5660c7f98395.png?v=1784720550</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIM-16450-2_94c01aec-b70a-4857-b3ad-61da8ca3bc24.png?v=1784720555</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIM-16500-1_df738e76-19fd-410b-b532-03b882069b67.png?v=1784720557</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIM-16500-2_b9b40eae-8bfa-4f0a-9f5a-8eee8292cf47.png?v=1784923737</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIM-16570-2.png?v=1784720561</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIM-16650-2.png?v=1784720563</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIM-16660-4.png?v=1784720565</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIM-16720-1_7049cc7c-f18c-4d1a-a55f-e1b2ba75ed06.png?v=1784720567</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIM-16750-7_23a339ed-1b50-47af-b4f3-42e7c603f399.png?v=1784720569</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIM-16970-2.png?v=1784720571</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIM-17000-1.png?v=1784720573</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIM-17010-1.png?v=1784720575</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIM-17090-1.png?v=1784720576</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIM-17120-1.png?v=1784720578</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIM-17170-1_eb0cd4aa-1be6-43cf-aba0-cc10b28f2057.png?v=1784720580</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIM-17170-7.png?v=1784720582</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIM-17500-1.png?v=1784720584</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIM-17500-7_b269ceac-1b49-4c40-9e86-34b9d3a8392c.png?v=1784720586</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIM-17510-1.png?v=1784720588</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIM-17510-9_841976ee-0e36-43d9-b7d8-8c4700ac5788.png?v=1784720590</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIM-7000-52.png?v=1785287181</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIN-17600-1_8205bde1-47cb-48c7-b393-ebea875aefb1.png?v=1784720593</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIN-17670-1.png?v=1784720595</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIN-17670-7.png?v=1784720597</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIN-17730-2.png?v=1784720599</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIN-17770-2_e9bca7ab-ccc4-42d7-b0f4-72966da5b5d0.png?v=1784720602</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIN-17770-3.png?v=1784720604</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIN-17800-1_a270ee96-1eb8-41db-bff3-7d1108f29922.png?v=1784777998</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIN-17840-1_77bef1de-1c58-4e9d-93ea-8b6e3ef36889.png?v=1784720608</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIN-17900-1.png?v=1784720609</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIN-6020-55.png?v=1784720611</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIN-7600-52.png?v=1784720613</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>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/orp-standard-200-mv-500-ml-labchem-lc180101</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIO-18010-1.png?v=1784720615</image:loc>
      <image:title>ORP Standard, 200 mV, 500 mL, LabChem, LC180101</image:title>
      <image:caption>ORP Standard, 200 mV, 500 mL, LabChem, LC180101</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/orp-standard-400-mv-500-ml-amber-glass-bottle-labchem-lc180151</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIO-18015-1.png?v=1784720617</image:loc>
      <image:title>ORP Standard, 400 mV, 500 mL Amber Glass Bottle, Labchem, LC180151</image:title>
      <image:caption>ORP Standard, 400 mV, 500 mL Amber Glass Bottle, Labchem, LC180151</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/o-tolidine-0-1-1-l-poly-bottle-lc261602-non-regulated</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIO-26160-2_03dbba13-0794-409c-8c15-3b5a16edc74c.png?v=1784720619</image:loc>
      <image:title>o-Tolidine, 0.1%, 1 L Poly Bottle, LC261602 (Non-Regulated)</image:title>
      <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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIP-14000-1_f54b6a98-3fa8-4789-ad78-a1fe09235587.png?v=1784720620</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIP-14000-7.png?v=1784720622</image:loc>
      <image:title>Filling Solution (Potassium Chloride) 4 M (4 N), Saturated with AgCl, for pH Electrodes, 125 mL Poly Bottle, LC140007</image:title>
      <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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIP-18150-1.png?v=1784720624</image:loc>
      <image:title>1,10-Phenanthroline, 0.1% Aqueous, for Iron,  500 mL Poly Bottle, LC181501 (Non-Regulated)</image:title>
      <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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIP-18198-9.png?v=1784720626</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIP-18200-1.png?v=1784720628</image:loc>
      <image:title>Phenolphthalein, 0.5% In 50% Ethanol, pH 8.3 - 10.0 Colorless to Pink, 500 mL Poly Bottle, LC182001</image:title>
      <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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIP-18200-7.png?v=1784720630</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIP-18210-7.png?v=1784720632</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIP-18220-1.png?v=1784720634</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIP-18220-2.png?v=1784720636</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIP-18220-7.png?v=1784720638</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIP-18330-1.png?v=1784720640</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIP-18330-7.png?v=1784720642</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIP-18360-2.png?v=1784720644</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIP-18380-2.png?v=1784720646</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIP-18500-1.png?v=1784720649</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIP-18500-2_828b579e-34c9-4f1e-8a85-c5c048b854e6.png?v=1784923742</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIP-18540-2.png?v=1784720653</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIP-18570-1_f1b11677-ac47-4614-bf2e-9756a374ccfb.png?v=1784720655</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIP-18590-1.png?v=1784720656</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>
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    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIP-18720-1.png?v=1784720658</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>
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    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIP-18790-1.png?v=1784720660</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIP-18800-1.png?v=1784720662</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIP-18800-2.png?v=1784720664</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>
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    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIP-18800-7.png?v=1784720666</image:loc>
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      <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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIP-18850-1.png?v=1784720669</image:loc>
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      <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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIP-18980-1.png?v=1784720670</image:loc>
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      <image:caption>Potassium Dichromate, 0.1N (0.0167M), 500 mL, LabChem, LC189801</image:caption>
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  </url>
  <url>
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    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
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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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIP-18980-4.png?v=1784923744</image:loc>
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      <image:caption>Potassium Dichromate, 0.1N (0.0167M), 4 L Poly Bottle, LabChem, LC189804</image:caption>
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  </url>
  <url>
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    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIP-19010-5_a0d350a3-a31e-4ee1-ac4d-4de0156bcab1.png?v=1784720676</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>
    <loc>https://preiser.com/products/potassium-hydroxide-0-1-n-0-1-m-500-ml-poly-bottle-lc193001-non-regulated</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIP-19300-1_7cdb3e73-8de0-4d4b-b3f4-d9d5bc6806ea.png?v=1784720678</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIP-19300-2.png?v=1784720680</image:loc>
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      <image:caption>Potassium Hydroxide, 0.1 N (0.1 M), 1 L Poly Bottle, LC193002</image:caption>
    </image:image>
  </url>
  <url>
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    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIP-19560-4.png?v=1784720682</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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    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIP-19660-1.png?v=1784720684</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>
  </url>
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    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIP-19660-2.png?v=1784720686</image:loc>
      <image:title>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:title>
      <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>
    <loc>https://preiser.com/products/potassium-iodate-iodide-0-0125n-0-002083m-for-sulfide-traceable-to-nist-4-l-poly-bottle-lc196604-non-regulated</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIP-19660-4.png?v=1784720688</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>
    <loc>https://preiser.com/products/potassium-iodide-acs-500-g-amber-glass-bottle-lc196901-non-regulated</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIP-19690-1_889199fb-a2ad-4bda-b664-09b4540f6d45.png?v=1784720690</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIP-19760-2_a78b46c9-5e19-42c5-9618-c7e512e0d4df.png?v=1784720692</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>
    <loc>https://preiser.com/products/potassium-iodide-10-w-v-4-l-amber-bottle-labchem-pip-19760-4</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIP-19760-4.png?v=1784720694</image:loc>
      <image:title>Potassium Iodide, 10% w/v, 4 L Amber Bottle, LabChem, PIP-19760-4</image:title>
      <image:caption>Potassium Iodide, 10% w/v, 4 L Amber Bottle, LabChem, PIP-19760-4</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/potassium-iodide-20-w-v-20-l-cubitainer-labchem-lc198005</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIP-19800-5.png?v=1784720696</image:loc>
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      <image:caption>Potassium Iodide, 20% w/v, 20 L Cubitainer, LabChem, LC198005</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/potassium-permanganate-0-05-n-0-01-m-1-l-amber-glass-bottle-lc199602-non-regulated</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIP-19960-2.png?v=1784720697</image:loc>
      <image:title>Potassium Permanganate, 0.05 N (0.01 M) 1 L Amber Glass Bottle, LC199602 (Non-Regulated)</image:title>
      <image:caption>Potassium Permanganate, 0.05 N (0.01 M) 1 L Amber Glass Bottle, LC199602 (Non-Regulated)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/potassium-permanganate-0-1-n-0-02-m-500-ml-amber-glass-bottle-labchem-lc199801</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
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      <image:caption>Potassium Permanganate, 0.1 N (0.02 M), 500 mL Amber Glass Bottle, Labchem, LC199801</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/potassium-permanganate-0-1-n-0-02-m-1-l-amber-glass-bottle-lc199802-non-regulated</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIP-19980-2.png?v=1784720701</image:loc>
      <image:title>Potassium Permanganate, 0.1 N (0.02 M), 1 L Amber Glass Bottle, LC199802 (Non-Regulated)</image:title>
      <image:caption>Potassium Permanganate, 0.1 N (0.02 M), 1 L Amber Glass Bottle, LC199802 (Non-Regulated)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/potassium-permanganate-0-1-n-0-02-m-4-l-amber-glass-bottle-labchem-lc199804</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIP-19980-4.png?v=1784720704</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>
    <loc>https://preiser.com/products/potassium-permanganate-0-2-n-0-040-m-500-ml-amber-glass-bottle-labchem-lc200001</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIP-20000-1.png?v=1784720705</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIP-20090-1.png?v=1784720707</image:loc>
      <image:title>Potassium Phosphate, Dibasic, ACS Grade, 500 g Poly Bottle, Labchem, LC200901</image:title>
      <image:caption>Potassium Phosphate, Dibasic, ACS Grade, 500 g Poly Bottle, Labchem, LC200901</image:caption>
    </image:image>
  </url>
  <url>
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    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIP-3343-4_46c5aa13-d5d8-4208-bf82-5260b8a1d977.png?v=1784720710</image:loc>
      <image:title>Phenylarsine Oxide (PAO), 0.00564 N (0.00282 M)(1 mL = 0.2 mg Cl), 4 L, LabChem, LC183604</image:title>
      <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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    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIP-8040-52_bb89b86f-b087-4896-912e-8b2ebd5b16e3.png?v=1784720711</image:loc>
      <image:title>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:title>
      <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>
  </url>
  <url>
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    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIP-8421-4L.png?v=1784720714</image:loc>
      <image:title>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:title>
      <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>
  </url>
  <url>
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    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIP-8679-1L.png?v=1784720716</image:loc>
      <image:title>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:title>
      <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>
  </url>
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    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIP-8845-63.png?v=1784720717</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>
  <url>
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    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIP-P-25901-38.png?v=1784720719</image:loc>
      <image:title>Phosphoric Acid, 15%, (Sold by Each / Each = Poly Bottle of 4 L) (8, UN1805, PG III)</image:title>
      <image:caption>Phosphoric Acid, 15%, (Sold by Each / Each = Poly Bottle of 4 L) (8, UN1805, PG III)</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/potassium-ferrocyanide-15-w-v-20-l-cubitainer-specialty-labchem-p09301</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIP-P09301_db8891b0-2f78-4fb0-b6b3-31afdf41b537.png?v=1785287183</image:loc>
      <image:title>Potassium Ferrocyanide, 15% w/v, 20 L Cubitainer, Specialty, Labchem, P09301</image:title>
      <image:caption>Potassium Ferrocyanide, 15% w/v, 20 L Cubitainer, Specialty, Labchem, P09301</image:caption>
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  <url>
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    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
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    </image:image>
  </url>
  <url>
    <loc>https://preiser.com/products/sodium-hydroxide-1-0-normal-200-l-container-8-un1824-p-g-ii</loc>
    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
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      <image:caption>Sodium Hydroxide, 1.0 Normal, 200 L Container (8, UN1824, P.G. II)</image:caption>
    </image:image>
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  <url>
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    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
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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/PIS-22390-7_fd72f64a-cc27-4671-b45e-3cd9387707c1.png?v=1784720729</image:loc>
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  <url>
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    <changefreq>daily</changefreq>
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    </image:image>
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  <url>
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    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
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      <image:caption>Silver Nitrate, 10% w/v, 125 mL Amber Glass Bottle, LC225507 (Non-Regulated)</image:caption>
    </image:image>
  </url>
  <url>
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    <changefreq>daily</changefreq>
    <image:image>
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      <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>
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    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
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      <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>
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    <changefreq>daily</changefreq>
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      <image:caption>Silver Nitrate, 0.1 N (0.1 M), 500 mL Amber Glass Bottle, Labchem, LC227001</image:caption>
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  </url>
  <url>
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    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
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      <image:caption>Silver Nitrate, 0.1 N (0.1 M), 1 L, LabChem, LC22700</image:caption>
    </image:image>
  </url>
  <url>
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    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
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      <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>
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    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
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      <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>
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    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
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      <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>
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    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIS-23380-1_991667b0-129e-4e93-a9c1-5cab01eddfbf.png?v=1784720749</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>
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    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIS-23570-1.png?v=1784720751</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIS-24000-2_d43dd0fa-e7ea-4319-ae05-f72e3dd375e7.png?v=1784720753</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>
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    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
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      <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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
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      <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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIS-24150-2_d7015998-bb71-436a-b372-02505b8a59e1.png?v=1784720759</image:loc>
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      <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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
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      <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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
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      <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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
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      <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>
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    <lastmod>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
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      <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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIS-24220-4_34a1bcc9-8e0c-4fc5-a1bb-848724f81f2c.png?v=1784720769</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIS-24230-2_a4590f54-0bf1-4a6c-9db9-3b8b51e0306e.png?v=1784720771</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIS-24270-1.png?v=1784720773</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIS-24270-2.png?v=1784720775</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIS-24270-4.png?v=1784720777</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>2026-07-28T21:29:34-04:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0921/2041/6571/files/PIS-24270-5.png?v=1784720778</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>
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