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Qualitative Filter Papers Standard Grade 4

Grade 4: 20-25 µm
Extremely fast filtering with excellent retention of coarse particles and gelatinous precipitates such as ferric hydroxide and aluminum hydroxide. Very useful as a rapid filter for routine clean-up of biological fluids or organic extracts during analysis. Used when high flow rates in air pollution monitoring are required and the collection of fine particles is not critical.

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1004-027   Grade 4 circles, 27 mm, 400/pk
1004-042   Grade 4 circles, 42.5 mm, 100/pk
1004-047    Grade 4 circles, 47 mm, 100/pk
1004-050   Grade 4 circles, 50 mm, 100/pk
1004-055   Grade 4 circles, 55 mm, 100/pk
1004-070   Grade 4 circles, 70 mm, 100/pk
1004-090   Grade 4 circles, 90 mm, 100/pk
1004-110   Grade 4 circles, 110 mm, 100/pk
1004-125   Grade 4 circles, 125 mm, 100/pk
1004-150   Grade 4 circles, 150 mm, 100/pk
1004-185   Grade 4 circles,185 mm, 100/pk
1004-240   Grade 4 circles, 240 mm, 100/pk
1004-270   Grade 4 circles, 270 mm, 100/pk
1004-320   Grade 4 circles, 320 mm, 100/pk
1004-400   Grade 4 circles, 400 mm, 100/pk
1004-917   Grade 4 sheets, 460 x 570 mm, 100/pk
1004-930   Grade 4 sheets, 580 x 580 mm, 100/pk
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