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 Paper, Grade 413
Suitable for filtration of aluminum phosphate, barium carbonate, lead chromate, and more.
Whatman™ Grade 93 Qualitative Filter Papers
These cellulose filter papers are intermediate in speed and retention between grades 1 and 4.
Glass Microfiber Filter Paper
The glass filter paper is excellent for microwave testing where temperatures get very high such as for use in a food experiment where all the moisture is microwaved out to see how much solid is left behind. Withstands temperatures to 500 °C. Size of each: 11 cm diameter.
Standard Grade Qualitative Filter Papers
Qualitative Filter Paper is available in three standard grades.
Eisco Premium Qualitative Filter Papers
Pack of 100 premium Qualitative Filter Papers with medium speed (85 gsm) and 10 µm pore size.
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.
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.
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.