287 1/2 Folded filters, 150mm 50/pk, £ 57,67

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Grade 287 ½ Qualitative Filter Paper Folded (Prepleated), 150 mm Kieselguhr prepleated paper with a medium to slow flow rate and dditional adsorption effect. Savings in time required to quadrantfold circles to fit conical filter funnels in repetitive or multiple analyses. Decreased overall filtration time because of the extra surface area exposed; the normal slow down of filtration speed due to the loading of particulate is postponed. Increased total loading capacity as more filter area is available. Maintained flow rate due to the reduction in filter paper contact with funnel side and the selfsupporting shape of the filter itself. The prepleating does not significantly affect any of the technical data, and the same figures may be used for the flat circles. Timesaving Whatman qualitative grades are offered in this convenient form, which gives major advantages over flat circles. Additional adsorption effect e.g. for the separation of very fine semicolloidal turbidity, for clarifying milk serum, starch solutions, soil suspensions or sugarcontaining solutions prior to polarimetry or refractometry. Also available in flat stock form as Grade 287. Grade 287 ½ 287 1/2 Folded filters, 150mm 50/pk Packung: 50 Stück

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