滤纸
Made of pure cellulose treated with hydrochloric and hydrofluoric acid, filter paper is quantitative paper used for straining with fast flow rates and good retention. It creates a semi-permeable barrier perpendicular to a liquid or airflow in order to separate fine substances from liquids or air. Different grades of filter paper are available for performing routine laboratory work, ranging from coarse to fine filtration of particulates.
VWR® Laboratory Grade Filter Papers
Supplier: VWR BRAND PRIVATE LABEL USA
VWR® filter papers are high-performance cellulose-based filtration materials designed for accurate and reproducible separations in laboratory settings. Available in both qualitative and quantitative grades, these papers deliver consistent retention, flow rate, and purity across a wide range of scientific applications. Whether used in gravimetric analysis, sample cleanup, or routine laboratory workflows, VWR® filter papers provide the reliability and technical precision demanded by today's researchers.
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VWR® Low Nitrogen Content Filters, Grade 521
Supplier: VWR Collection
Low nitrogen content filters for determination of nitrogen content in steel and iron samples dissolved in acid. Filtration of fine precipitates to dissolve according Kjeldahl method.
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定量滤纸
Supplier: VWR Collection
424: 过滤硫酸铅、硫酸铁、硫酸银、碱金属碳酸盐、铬酸铅、砷、锑、镉和食品。 测定乳制品中的含砂量。测定造纸厂纸浆的白度。
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定性滤纸
Supplier: VWR Collection
These highly pure filter paper grades are produced from cellulose fibers with an alpha-cellulose content of nearly 100%, in accordance with precise quality standards. The ash content is approximately 0.06%.
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VWR® Qualitative Filter Papers, Grade 417
Supplier: VWR BRAND PRIVATE LABEL USA
可用于细颗粒的快速过滤。
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定性滤纸，410级
Supplier: VWR BRAND PRIVATE LABEL USA
可过滤铜(I)氧化物、硫酸铅、硫酸钡、碳酸锰等，适合于非常难的酒精澄清和过滤。
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Filter paper discs for Buchner table-top funnels, SP Bel-Art
Supplier: Bel-Art Products, a Part of SP
These heavy bond grade filter paper discs are custom-sized to fit table-top Buchner funnels and have a thickness of 0,30 mm.
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Application specific filter papers, Fritware®, SP Bel-Art
Supplier: Bel-Art Products, a Part of SP
These HDPE sheets can be cut, sawed, formed, machined and welded to fabricate special items.
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Grade shark skin filter papers for technical use, Whatman™
Supplier: CYTIVA WHATMAN
Whatman Grade Shark Skin filter papers are a creped filter paper that is commonly used to remove impurities in a variety of applications.
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Grade 5 qualitative filter papers, Whatman™
Supplier: CYTIVA WHATMAN
A standard grade clarifying filter excellent for cloudy suspensions and for water and soil analysis.
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Grade 3 qualitative filter papers, Whatman™
Supplier: CYTIVA WHATMAN
A standard grade filter used in qualitative analytical techniques to determine and identify materials. For use in büchner funnels.
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Qualitative filter papers, grade 201, Whatman™
Supplier: CYTIVA WHATMAN
A general qualitative filter for less critical routine analysis. Widely used in industrial laboratories and students laboratories for routine filtration.
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Grade 8 ruled filter papers, Whatman™
Supplier: CYTIVA WHATMAN
These white cotton linter cellulose filters are ideal for routine investigations of foreign substances in a variety of sample types.
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Grade 520 a ½ qualitative filter papers, Whatman™
Supplier: CYTIVA WHATMAN
A thin paper with great wet strength and a very high flow rate. Frequently used in technical applications such as the filtration of viscous liquids and emulsions (e.g., sweetened juices, spirits and syrups, resin solutions, oils, or plant extracts).
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Grade 602 h qualitative filter papers, Whatman™
Supplier: CYTIVA WHATMAN
A standard grade filter esed in sample preparation, e.g., in the beverage industry for residual sugar determination, acidic spectra, refractometric analysis, and HPLC.