WHA1004070
Whatman® qualitative filter paper, Grade 4
circles, diam. 70 mm, pack of 100
Synonym(s):
Whatman filter, Whatman filters, Whatman paper, Z240532, filter paper, filter papers, paper filter
About This Item
Recommended Products
material
cellulose filters
circles
packaging
pack of 100
manufacturer/tradename
Whatman 1004-070
Whatman Article No. 28414011 (US reference)
parameter
0.22 psi wet burst
37 sec/100 mL speed (Herzberg)
diam.
70 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
Excellent retention: captures coarse particles and gelatinous precipitates such as ferric hydroxide and aluminum hydroxide. Fast filtration: useful for routine clean-up of biological fluids or organic extracts during analysis
Grade 4 Qualitative Filter Papers (20-25 µm particle retention) are available in a variety of sizes and formats including circles, sheets, and rolls. They are also available as prepleated filters, which give improved flow rate and increased loading capacity compared to equivalent flat filters.
Features and Benefits
- Useful in qualitative analytical separations when Fast flow is required and the collection of fine particles is not critical.
- These cellulose filters are used in qualitative analytical techniques to determine and identify materials (e.g., in air pollution monitoring).
Other Notes
Legal Information
Certificates of Analysis (COA)
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