{"product_id":"whatman-grade-42-quantitative-ashless-filter-paper-very-fine-precipitates-retained-4-25-cm","title":"Whatman Grade 42 Quantitative Ashless Filter Paper, Very Fine Precipitates Retained, 4.25 cm","description":"\u003cp\u003eGrade 42 Ashless Filter Paper for Instrumental Analysis, 42.5 mm circle\u003c\/p\u003e\n\u003cp id=\"overview\" class=\"lead-paragraph\"\u003eOur high-purity Cytiva Whatman ashless Grade 42 quantitative filter papers are suitable for a wide range of critical analytical filtration procedures for quantitative analysis. Grade 42 filter papers have the finest retention of all Whatman ashless filter paper grades. Grade 42 is designed for gravimetric analysis and sample preparation for instrumental analysis.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eAshless: 0.007% ash maximum\u003c\/li\u003e\n\u003cli\u003eFine (2.5 μm) nominal particle retention rating, eliminates large particles that might otherwise interfere with sensitive instrumentation\u003c\/li\u003e\n\u003cli\u003eHerzberg filtration speed of 1870 s\u003c\/li\u003e\n\u003cli\u003eCommonly used as a calcium carbonate filter\u003c\/li\u003e\n\u003cli\u003eParticularly suitable for gravimetric analysis\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv class=\"rte-wrapper\"\u003e\n\u003cp\u003eWhatman Grade 42 quantitative papers from Cytiva business are designed for retention of extremely small particles. A common example is use of Grade 42 as a calcium carbonate filter for analysis in the cement industry.\u003c\/p\u003e\n\u003cdiv class=\"read-more-expandable\"\u003e\n\u003cp\u003eOther typical precipitates for gravimetric analysis include barium sulfate and metastannic acid for use in glazes, coatings, and pigments. The high purity of Cytiva's Grade 42 filters also makes them suitable for processes that require ashing.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"rte-wrapper\"\u003e \u003c\/div\u003e","brand":"Cytiva","offers":[{"title":"PK (1)","offer_id":51110953156923,"sku":"90-7503-01-PK","price":39.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0921\/2041\/6571\/files\/90-7503-01_69b8385c-5183-47dd-b7d2-1ffcd0cac784.png?v=1784705367","url":"https:\/\/preiser.com\/products\/whatman-grade-42-quantitative-ashless-filter-paper-very-fine-precipitates-retained-4-25-cm","provider":"Preiser Scientific","version":"1.0","type":"link"}