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.
Applied Filters
Whatman™ Grade 93 Qualitative Filter Papers
These cellulose filter papers are intermediate in speed and retention between grades 1 and 4.
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Whatman™ No. 1 Filter Paper, Whatman products (Cytiva)
High Quality Filter Paper.
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Whatman™ Grade 202 Qualitative Filter Papers, Whatman products (Cytiva)
A general qualitative filter with creped surface. Faster than grade 201 and retains large crystalline coarse particles. Widely used in industrial laboratories and students laboratories for routine filtration.
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Qualitative Filter Paper, Whatman products (Cytiva)
Grade 93 qualitative filter paper.
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Whatman™ Grade 4 Qualitative Filter Papers, Whatman products (Cytiva)
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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Whatman™ Grade 201 Qualitative Filter Papers, Whatman products (Cytiva)
A general qualitative filter for less critical routine analysis. Widely used in industrial laboratories and students laboratories for routine filtration.