Whatman® Grade 41, Ashless Filter Paper

Whatman® Grade 41 filter paper is the fastest ashless filter paper, recommended for analytical procedures involving coarse particles or gelatinous precipitates (e.g. iron or aluminum hydroxides). Also used in quantitative air pollution analysis as a paper tape for impregnation when determining gaseous compounds at high flow rates.

Whatman® Grade 41 filter paper has a particle retention size of 20 μm at 98% efficiency.

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WHA1441042 Whatman® quantitative filter paper, ashless, Grade 41 circles, diam. 42.5 mm, pack of 100
WHA1441055 Whatman® quantitative filter paper, ashless, Grade 41 circles, diam. 55 mm, pack of 100
WHA1441070 Whatman® quantitative filter paper, ashless, Grade 41 circles, diam. 70 mm, pack of 100
WHA1441090 Whatman® quantitative filter paper, ashless, Grade 41 circles, diam. 90 mm, pack of 100
WHA1441110 Whatman® quantitative filter paper, ashless, Grade 41 circles, diam. 110 mm, pack of 100
WHA1441125 Whatman® quantitative filter paper, ashless, Grade 41 circles, diam. 125 mm, pack of 100
WHA1441150 Whatman® quantitative filter paper, ashless, Grade 41 circles, diam. 150 mm, pack of 100
WHA1441185 Whatman® quantitative filter paper, ashless, Grade 41 circles, diam. 185 mm, pack of 100
WHA1441240 Whatman® quantitative filter paper, ashless, Grade 41 circles, diam. 240 mm, pack of 100
WHA1441060 Whatman® quantitative filter paper, ashless, Grade 41 circles, diam. 60 mm, pack of 100
WHA1441047 Whatman® quantitative filter paper, ashless, Grade 41 circles, diam. 47 mm, pack of 100
WHA1441917 Whatman® quantitative filter paper, ashless, Grade 41 sheets, W × L 460 mm × 570 mm, pack of 100
WHA1441320 Whatman® quantitative filter paper, ashless, Grade 41 circles, diam. 320 mm, pack of 100
WHA1441866 Whatman® quantitative filter paper, ashless, Grade 41 sheets, W × L 203 mm × 254 mm, pack of 100
WHA1441050 Whatman® quantitative filter paper, ashless, Grade 41 circles, diam. 50 mm, pack of 100