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Made of pure cellulose treated with hydrochloric and hydrofluoric acid, filter papers are used for straining with good retention and flow rates. These cellulose filters create 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 various laboratory applications including routine lab work, ranging from coarse to fine filtration of particulates. VWR offers a wide range of qualitative and quantitative filter papers with varying pore size, particle retention, flow rate and filtration times.
Cellulose chromatography papers, Whatman™
Supplier: CYTIVA WHATMAN
Whatman chromatography papers are widely used across the world, reflecting their purity, high quality and consistency. They are made from specially selected cotton cellulose and rigorously quality controlled to ensure uniformity within the grade.
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Phase-separating paper, grade 1PS, Whatman™
Supplier: CYTIVA WHATMAN
1PS phase-separating paper is a hydrophobic filter for routine solvent extraction. Within seconds it retains aqueous phases, while solvent phases flow through.
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Grade 2589 D filter papers for technical use, Whatman™
Supplier: CYTIVA WHATMAN
A very thick filter with high wet strength. Offers medium to slow flow rate and retains very fine precipitates.
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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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Quantitative filter papers, ashless grades, grade 41, Whatman™
Supplier: CYTIVA WHATMAN
Cytiva's Whatman Grade 41 environmental pollution papers are among the fastest filter papers in the Whatman ashless range. This gravimetric filter is well suited for quantitative analysis of soil and air.
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Grade 4 qualitative filter papers, Whatman™
Supplier: CYTIVA WHATMAN
Whatman Grade 4 Qualitative Filter Papers are a standard grade, high flow rate filter paper. They are useful in qualitative analytical separations when fast flow is required and the collection of fine particles is not critical.
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Filter papers, grade F319-04, Whatman™
Supplier: CYTIVA WHATMAN
Filter paper, qualitative, Whatman™, Grade F319-04, 44 mm
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Grade 2589 C filter papers for technical use, Whatman™
Supplier: CYTIVA WHATMAN
Thick filter with medium to slow filtration speed, high wet strength, and good retention for smaller particles.
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Qualitative filter papers, standard grades, grade 1 and 1V, Whatman™
Supplier: CYTIVA WHATMAN
Whatman Grade 1 Qualitative Filter Papers are the most widely used filter paper for routine laboratory applications, qualitative analytical separations, and clarifying liquids. They are the standard grade cellulose filter papers for medium flow rates.
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Quantitative filter papers, hardened ashless grades, grade 540, Whatman™
Supplier: CYTIVA WHATMAN
Cytiva's Whatman Grade 540 is a high-purity, acid-treated cellulose lab filter paper. Mechanically strong Grade 540 is well suited for quantitative or gravimetric analysis of strongly acidic or alkaline samples.
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Seed testing papers, Whatman™
Supplier: CYTIVA WHATMAN
Owing to their extremely high purity our seed testing papers provide reliable and reproducible results. The papers are made from pure cellulose without any additives and do not contain any substances that could influence the growth of the seeds. The constant water absorption of the papers ensures the continuous provision of the required amount of water.
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定性滤纸
Supplier: VWR Collection
级 402 和 302: 通用级别，可用于定性检测。适用于大多数硫化物。 测定乳制品中的总脂肪含量。
级 403 和 313: 药品、药物、酒类、酊剂，临床实验室中的色层分析和无蛋白过滤。