10 in stock
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
fiber shedding is utilized in carriers for integrated circuits.
This grade is also available in Smear Tab format for wipe testing (e.g. testing of
surfaces for radionuclide contamination).
Rs.5,130.00 Rs.6,840.00
Quantitative filter papers – Hardened low ash grades
The maximum ash content of these grades is intermediate between ashless and qualitative grades. They are
particularly suitable for Büchner filtrations where it is desirable to recover the precipitate from the filter surface
after filtration. Other characteristics include high wet strength and chemical resistance, which are similar to
the acid hardened ashless filter papers.
| Variation Codes | 1450-125 |
|---|
Grade GF10 Reel 35 mm x 30 m Core 70 mm 1/PK
This filter with extreme mechanical stability and temperature resistant up to 180°C is used
as a weighing aid for infrared weighing and as a roll filter in automatic air filtration units.
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
analysis in the construction, mining, and steel industries.
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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