Whatman quantitative filters are designed for gravimetric analysis and the preparation of sample for instrumental analysis. Hardened ashless filter papers with 0.006% ash maximum are treated with a strong acid to remove trace metals and produce high wet strength and chemical resistance. All hardened ashless papers are sold as packs of 100.
Grade 540 (8µm)
The general purpose hardened ashless filter paper with medium retention and flow rate. Extremely pure and strong with a hard surface. High chemical resistance to strong acid and alkali. Frequently used in the gravimetric analysis of metals in acid/alkali solutions and in collecting hydroxides after precipitation by strong alkalis.
To help you choose the right filter for your application please click on the image below that will take you to the application guide for:
 There is also a link to the Cytiva Filter Paper Selector Guide
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