WHA1004930
Whatman® qualitative filter paper, Grade 4
sheets, W × L 580 mm × 580, pack of 100
Synonym(s):
Z752363
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About This Item
UNSPSC Code:
41104900
NACRES:
NB.24
Recommended Products
material
cellulose
sheets
feature
Grade 4
packaging
pack of 100
manufacturer/tradename
Whatman 1004-930
Whatman Article No. 28414031 (US reference)
parameter
0.22 psi wet burst
37 sec/100 mL speed (Herzberg)
W × L
580 mm × 580
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.
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
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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