Circle Filter Paper, qualitative, 90 mm, Grade 597, medium fast, 81 g/sqm, 100 pcs.

Because of the high purity (ash content on average 0.08%) recommended for the precise determination of substances and for sample preparation for sensitive detection methods. Made from the same raw materials - refined cotton linters and cellulose - manufactured like the quantitative filter papers. Alpha-cellulose content over 95%, therefore high stability and durability, very low mineral content: ash 0.08%.

These papers are excellent suitable for: Food control, beverage analysis, environmental monitoring.

These types are available as round filters and pleated filters with the following sizes in millimeters: 6 – 12.7 – 42, 5 – 47 – 55 – 70 – 90 – 110 – 125 – 150 – 185 – 240 – 320 (pleated filters from 70 mm).

This product is equivalent to: Schleicher-Schüll 597 -- Whatman 2 -- Macherey Nagel 616 -- Sartorius 289