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MACHEREY-NAGEL Filter Paper Meets Your Needs

Each box contains 100 Circle Filter Papers

Filter papers for qualitative analysis:

Standard filter papers for qualitative analysis Grade 615 (Whatman No.1)

Qualitative filter papers are manufactured from the same raw materials as the ashless grades and are particularly suited for general laboratory filtrations. The average ash content is about 0.1 %, the amount of α-cellulose is about 95 %.

Grade: MN 615 ≡ Whatman No. 1, medium fast filtration (smooth), Thickness: 0.16 mm, Filtration speed: 22 s, Basis weight: 70 g/m2

Filter papers for quantitative analysis:

Ashless Filter Papers Grades 640 md (Whatman No. 40), 640 w (Whatman No. 41), and 640 d (Whatman No. 42)

Ashless filter papers are particularly suited for quantitative routine analysis and are manufactured from refined pulp and linters. They are acid-washed and have an extremely low ash content of < 0.01 %. The amount of α-cellulose is about 95 %.

Grade MN 640 md ≡ Whatman No. 40, yellow label ≡ red ribbon, medium to slow filtration (smooth), Thickness: 0.2 mm Filtration speed: 55 s, Basis weight: 85 g/m2

Grade MN 640 w ≡ Whatman No. 41, grey label ≡ black ribbon, fast filtration (smooth), Thickness: 0.2 mm, Filtration speed: 9 s, Basis weight: 85 g/m2

Grade MN 640 d ≡ Whatman No. 42, green label ≡ blue ribbon slow filtration (smooth), Thickness: 0.17 mm, Filtration speed: 140 s, Basis weight: 85 g/m2