Cellulose filters are used in qualitative analytical techniques to determine and identify materials.
Prepleated qualitative filters are available, which give improved flow rate and increased loading capacity compared to equivalent flat filters.
-25%
| Variation Codes | 1006-090 |
|---|
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Whatman
Quantitative Filter Papers-Grade Grade 50: 2.7μm
Grade 50: 2.7 μm*
Retention of very fine crystalline precipitates.The thinnest of all Whatman filter papers with a slow flow rate, these filters have a hardened and highly glazed surface, which also keeps the paper free from loose surface fibers.
Highly suitable for
qualitative or quantitative filtrations requiring vacuum assistance on Büchner
or 3-piece filter funnels.Very strong when wet and will withstand wet handling and
precipitate removal by scraping.In the electronics industry, the virtual absence of
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Quantitative Filter Papers-Grade 43: 16μm
Grade 43: 16 μm*
Intermediate in retention between Grades 40 and 41, and twice as fast as Grade 40.Typical applications include foodstuffs analysis, soil analysis, particle collection in
air pollution monitoring for subsequent analysis by XRF techniques, and inorganic
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Whatman
Quantitative Filter Papers-Grade 40: 8μm
Grade 40: 8 μm*
The classic general purpose ashless filter paper with medium speed and retention.
Typical applications include gravimetric analysis for numerous components in cements,clays, iron, and steel products; as a primary filter for separating solid matter from aqueous extracts in general soil analysis; quantitative determination of sediments in milk, and as a pure analytical grade clean-up filter for solutions prior to AA
spectrometry.Also used as a high-purity filter in the collection of trace elements and radionuclides from the atmosphere.
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