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Whatman quantitative filters are designed for gravimetric analysis and the preparation of sample for instrumental analysis. Ashless filter papers with 0.007% ash maximum are very pure filters ideal for a wide range of critical analytical filtration procedures. All ashless papers are sold as packs of 100.
Grade 40 (8µm)
The classic general purpose paper with medium spped and retention. Typical applications include:
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
How do you choose the right size filter paper for your funnel? Use the table below to see what size filter paper you should use Gravity filtration using a filter paper inside a filtration funnel is used to remove precipitates from a liquid. The remaining liquid is known as the filtrate. For standard shaped filter funnels where the walls are at 58 or 60° the table below shows the r...
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