WHA1004090
Whatman® qualitative filter paper, Grade 4
circles, diam. 90 mm, pack of 100
Synonym(s):
Z240540, filter papers
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About This Item
UNSPSC Code:
41104900
NACRES:
NB.24
Recommended Products
material
cellulose filters
circles
packaging
pack of 100
manufacturer/tradename
Whatman 1004-090
Whatman Article No. 28414012 (US reference)
parameter
0.22 psi wet burst
37 sec/100 mL speed (Herzberg)
diam.
90 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
Whatman Grade 4 Qualitative Filter Papers are a standard grade, high flow rate filter paper.
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.
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
Field of Use : For internal research use only. Products are not intended for diagnostic use or resale.
Legal Information
Whatman is a registered trademark of Cytiva
Certificates of Analysis (COA)
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