Qualitative Filter Paper
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. Avantor offers a wide range of qualitative and quantitative filter papers with varying pore size, particle retention, flow rate and filtration times.
VWR®, Qualitative Filter Papers
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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Application specific filter papers, grade 0790 ½, Whatman™
Supplier: Whatman products (Cytiva)
Acid washed cellulose filter paper with ash content of approximately 0,01%, low magnesium, for the determination of trace elements (Mg, Mn, Co, Cu, Mo, B).
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Application specific filter papers, grade 287 ½, Whatman™
Supplier: Whatman products (Cytiva)
Kieselguhr paper with a medium to slow flow rate. Additional adsorption effect, e.g., for the separation of very fine semi-colloidal turbidity, for clarifying milk serum, starch solutions, soil suspensions or sugar-containing solutions prior to polarimetry or refractometry.
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Application specific filter papers, grade 512 ½, Whatman™
Supplier: Whatman products (Cytiva)
Low phosphate cellulose papers approximately 1,5 ppm phosphate, for the filtration of calcium lactate extracts from soil samples for the determination of K and P according to Egnér, Riehm and Lederle.
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Qualitative filter papers, standard grades, grade 591, Whatman™
Supplier: Whatman products (Cytiva)
These cellulose filters are used in qualitative analytical techniques to determine and identify materials.
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Qualitative filter papers, standard grades, grade 593 ¹/₂, Whatman™
Supplier: Whatman products (Cytiva)
These cellulose filters are used in qualitative analytical techniques to determine and identify materials. A standard grade filter paper for fine precipitates.
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Qualitative filter papers, standard grades, grade 594 ¹/₂, Whatman™
Supplier: Whatman products (Cytiva)
These cellulose filters are used in qualitative analytical techniques to determine and identify materials. A standard grade filter paper for fine precipitates.
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Qualitative filter papers, grade 595, Whatman™
Supplier: Whatman products (Cytiva)
A standard grade filter used for many routine analytical applications in different industries (e.g., particle separation from food extracts or filtration of solids from digested environmental samples for iCP/AAs analysis).
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Grade 595 ½ qualitative filter papers, Whatman™
Supplier: Whatman products (Cytiva)
A prepleated filter used for many routine analytical applications in different industries (e.g., particle separation from food extracts or filtration of solids from digested environmental samples, e.g., for ICP/AAS analysis).
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Qualitative filter papers, standard grades, grade 597 and 597¹/₂, Whatman™
Supplier: Whatman products (Cytiva)
Savings in time required to quadrant-fold circles to fit conical filter funnels in repetitive or multiple analyses.
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Qualitative filter papers, grade 598, Whatman™
Supplier: Whatman products (Cytiva)
A thick filter paper with high loading capacity. Combines medium retention with medium-fast to fast filtration speed.
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Qualitative filter papers, Grade 598 ½, Whatman™
Supplier: Whatman products (Cytiva)
A thick prepleated filter paper with high loading capacity. Combines medium retention with medium-fast to quick filtration speed.
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Qualitative filter papers, standard grades, grade 602 eh and 602 eh ½, Whatman™
Supplier: Whatman products (Cytiva)
Grade 602EH and 602EH½ Qualitative Filter Papers for very fine precipitates.
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Grade 602 h qualitative filter papers, Whatman™
Supplier: Whatman products (Cytiva)
A standard grade filter esed in sample preparation, e.g., in the beverage industry for residual sugar determination, acidic spectra, refractometric analysis, and HPLC.
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Grade 602 h ½ qualitative filter papers, Whatman™
Supplier: Whatman products (Cytiva)
A dense prepleated filter paper for collecting very small particles and removing fine precipitates.
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Qualitative filter papers, standard grades, grade 604 ½, Whatman™
Supplier: Whatman products (Cytiva)
Grade 604½ Qualitative Filter Papers for coarse precipitates. Maintains flow rate due to the reduction in filter paper contact with funnel side and the self-supporting shape of the filter itself.
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