Ashless grades are very pure filters suitable for a wide range of critical analytical filtration procedures. Whatman quantitative filter papers are designed for gravimetric analysis and the preparation of samples for instrumental analysis.
High-purity filters for quantitative analysis
Contain 0.007% maximum ash content
Medium nominal particle retention rating of 8µm
Medium filtration speed (Herzberg 340 sec.)
Soil analysis, when separating solid matter from aqueous extracts
Quantitative determination of milk sediment
Use as a clean-up filter for solutions prior to atomic absorption (AA) spectrometry
Analysis of constituent components in cements, clays, iron, and steel products
Collection of trace elements and radionuclides from the atmosphere
Medium crystalline precipitates: calcium oxalate, well-digested barium. Normal loading; limited wet strength
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