Grade 13 filter paper from Camlab Filters, equivalent to grade 40, ashless medium filtering paper. Quantitative filter paper, 5-8µm particle retention, diameter 12.5 cm
Medium pored filter paper used for fine precipitates such as magnesium ammonium phosphate, calcium oxalate, magnesium ammonium arsenate, coarser forms of barium sulphate. Our ashless quantitative filter papers are made with 100% cotton linters. As quantitative analysis requires a high purity paper these are washed out with acid and finally cleaned with demineralised water. The ash content is 0.007%
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