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Ahlstrom 6310-1850 Eaton-Dike Filter Paper, 10 Micron, Medium Flow, Grade 631, 18.5cm Diameter (Pack of 100): Science Lab Qualitative Filter Paper: Industrial & Scientific. Ahlstrom 6310-1850 Eaton-Dike Filter Paper, 10 Micron, Medium Flow, Grade 631, 18.5cm Diameter (Pack of 100): Science Lab Qualitative Filter Paper: Industrial & Scientific. Quantitative analysis 。 Low ash content 0.06 percent 。 Untreated; high wet-strength 。 Consistent performance 。 Custom cut 。 's qualitative grades of filter paper are, by definition, recommended for use in analytical methods, which determine or identify particulate constituents of a mixture irrespective of the amount present. Qualitative filter papers are often used in routine separation work that still requires high purity and consistent performance. offers a complete range of low ash filter papers for general laboratory work that provides you with the correct combination of particle retention, filtration speed, loading capacity and wet-strength. All our qualitative grades consist of greater than 5 percent super refined a-cellulose and linter fibers. This grade is used for the filtration of coarse particles and gelatinous precipitates such as ferric aluminum and magnesium hydroxides. 63 is used in air monitoring and gas filtration when high flow rate is needed. This grade is also found in routine cleanup analysis of insoluble liquids such as biological fluids and organic elements. 34 sec/00mls Filtration speed herzberg. 200 mls/min Filtration speed rapidity. Medium loading capacity. 。 。 。