Z759791

Whatman® qualitative filter paper, Grade 4

circles, diam. 41 mm, pack of 100

价格与库存信息目前不能提供

material

cellulose filters
circles

packaging

pack of 100

mfr. no.

Whatman Article No., 28414006 (US reference)
Whatman, 1004-041

parameter

0.22 psi wet burst
37 sec/100 mL speed (Herzberg)

diam.

41 mm

thickness

205 μm

ash

≤0.06%

pore size

20-25 μm (Particle retention)

basis weight

92 g/m2

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General description

These cellulose filters are used in qualitative analytical techniques to determine and identify materials. Prepleated qualitative filters are also available, which give improved flow rate and increased loading capacity compared to equivalent flat filters.

Grade 4: 20-25 μm, (very fast filter paper)

Extremely fast filtering with excellent retention of coarse particles and gelatinous precipitates such as ferric hydroxide and aluminum hydroxide. Very useful as a rapid filter for routine clean-up of biological fluids or organic extracts during analysis. Used when high flow rates in air pollution monitoring are required and the collection of fine particles is not critical.

Other Notes

Global SIAL customers (excluding Japan) can now order any product from the Cytiva Life Sciences consumables portfolio (prepack only) using GE′s product numbering system.

The legacy GE Whatman products that use the SIAL "Z" product numbering system will be discontinued and directly replaced with a product number using a "WHA" prefix plus the GE product code. For reference, the legacy "Z" product number is identified as a synonym on the "WHA" product number listing.

Legal Information

Whatman is a registered trademark of Cytiva
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