GVS Qualitative Filter Paper Grade 04 Very Fast; 15-20um Retention; 125mm Diameter

These filter papers are used for qualitative analysis. Qualitative filters are made of refined pulp and pure cotton linters with an alpha-cellulose content of nearly 100%, which gives them a number of diverse filtration properties. The ash content of less than 0.06% is not reduced by post-treatment.

• Grade 04 very fast filtration: very high rate of filtration with excellent retention of coarse precipitates such as metal hydroxides and sulphides or gelatinous substances. Preferably used as rapid filter for various organic metal precipitates, routine cleanup of biological fluids, food industry analysis, air pollution monitoring (high rates and the fine particles collection is not critical).
• Applications: Coarse and gelatinous precipitates such as iron hydroxide, aluminium hydroxide and chromium hydroxide; Silica determination in steel and iron analysis; Food analysis; Monitoring of air pollution when the collection of fine particles is not critical; Routine clean-up of biological fluids or organic extracts.