WHA1441070
Whatman® quantitative filter paper, ashless, Grade 41
circles, diam. 70 mm, pack of 100
Synonym(s):
Whatman filter, Whatman paper, Z241369, filter papers, paper filter
About This Item
Recommended Products
material
circles
cotton filters (high-quality cotton linters)
packaging
pack of 100
manufacturer/tradename
Whatman 1441-070
Whatman Article No. 28418015 (US reference)
parameter
0.22 psi wet burst
54 sec/100 mL speed (Herzberg)
diam.
70 mm
thickness
220 μm
ash
≤0.007%
pore size
20-25 μm (Particle retention)
basis weight
85 g/m2
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General description
Fast ashless paper for pollution analysis
Whatman Grade 41 filters from Cytiva′s business are suitable for quantitative air pollution analysis as a paper tape for impregnation when determining gaseous compounds at high flow rates.
Grade 41 filters are also commonly used in preparing solid environmental samples (e.g., soils, sludges) for metals analysis after nitric acid digestion. Grade 41 is available in a convenient, disposable, 47 mm filter funnel with a 250 ml capacity. The 47 mm diameter filter can be easily removed for further analysis or culturing.
Features and Benefits
- Extremely low ash content (0.007% ash maximum)
- 20 µm nominal particle retention rating
- Fast filtration speed (Herzberg 54 s)
- Commonly used for routine air pollution analysis and soil pollution analysis
Other Notes
Legal Information
Certificates of Analysis (COA)
Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.
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