Grade 50 Circles, 90mm 100/pk, £ 29,37

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Grade 50 Quantitative Filter Paper Hardened Low Ash, circle, 90 mm Grade 50 circles, hardened low ash, 90 mm. Hardened low ash: 0.015% ash maximum. These filters are treated with a strong acid to remove trace metals and produce high wet strength and chemical resistance. Thesy are particularly suitable for Büchner filtration where the tough smooth surface of the filter makes it easy to recover precipitates. The maximum ash content of these grades is intermediate between ashless and qualitative grades. They are particularly suitable for Büchner filtrations where it is desirable to recover the precipitate from the filter surface after filtration. Other characteristics include high wet strength and chemical resistance, which are similar to those of the acidhardened ashless filter papers. Retention of very fine crystalline precipitates. The thinnest of all Whatman filter papers. Slow flow rate. Hardened and highly glazed surface. This finish also keeps the paper free from loose surface fibers. Highly suitable for qualitative or quantitative filtrations requiring vacuum assistance on Büchner or threepiece filter funnels. Very strong when wet. Will withstand wet handling and precipitate removal by scraping. In the electronics industry, the virtual absence of fiber shedding is utilized in carriers for integrated circuits. This grade is also available in Smear Tab format for wipe testing (e.g., testing of surfaces for radionuclide contamination). Grade 50: 2.7 µm Grade 50 Circles, 90mm 100/pk Packung: 100 Stück

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