Qualitative Filter Paper

Whatman Grade 597 qualitative filter paper has a medium fast filtration speed with medium to fine particle retention (4-7 µm). Used for a wide variety of analytical routine applications in different industries like food testing (e.g., determination of fat content) or removal of carbon dioxide and turbidity from beverages (e.g., beer analysis). 100/box.

Whatman Grade 5 filter paper has the maximum degree of fine particle filtration (2.5 µm) in the qualitative range. Slow flow rate. Capable of retaining the fine precipitates encountered in chemical analysis. Excellent clarifying filter for cloudy suspensions and for water and soil analysis. 100 circles/box.

Whatman Grade 3 filter paper is double the thickness of Grade 1 with still finer particle retention and excellent loading capacity; more precipitate can be held without clogging. The extra thickness gives increased wet strength and makes this grade highly suitable for use in Büchner funnels. The high absorbency is particularly valuable when the paper is used as a sample...