Whatman® Grade 40, Ashless Filter Paper

Whatman® Grade 40 filter paper is the classic general purpose ashless filter paper with medium speed and retention. Typical applications include gravimetric analysis for numerous components in cements, clays, iron, and steel products; as a primary filter for separating solid matter from aqueous extracts in general soil analysis; quantitative determination of sediments in milk, and as a pure analytical grade clean-up filter for solutions prior to AA spectrometry. Also used as a high-purity filter in the collection of trace elements and radionuclides from the atmosphere.

Whatman® Grade 40 filter paper has a particle filtration size of 8 mm at 98% eficiency.

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WHA1440042 Whatman® quantitative filter paper, ashless, Grade 40 circles, diam. 42.5 mm, pack of 100
WHA1440055 Whatman® quantitative filter paper, ashless, Grade 40 circles, diam. 55 mm, pack of 100
WHA1440070 Whatman® quantitative filter paper, ashless, Grade 40 circles, diam. 70 mm, pack of 100
WHA1440090 Whatman® quantitative filter paper, ashless, Grade 40 circles, diam. 90 mm, pack of 100
WHA1440110 Whatman® quantitative filter paper, ashless, Grade 40 circles, diam. 110 mm, pack of 100
WHA1440125 Whatman® quantitative filter paper, ashless, Grade 40 circles, diam. 125 mm, pack of 100
WHA1440150 Whatman® quantitative filter paper, ashless, Grade 40 circles, diam. 150 mm, pack of 100
WHA1440185 Whatman® quantitative filter paper, ashless, Grade 40 circles, diam. 185 mm, pack of 100
WHA1440240 Whatman® quantitative filter paper, ashless, Grade 40 circles, diam. 240 mm, pack of 100
WHA1440917 Whatman® quantitative filter paper, ashless, Grade 40 sheets, W × L 460 mm × 570 mm, pack of 100
WHA1440047 Whatman® quantitative filter paper, ashless, Grade 40 circles, diam. 47 mm, pack of 100
WHA1440012 Whatman® quantitative filter paper, ashless, Grade 40 circles, diam. 12.7 mm, pack of 400
WHA1440032 Whatman® quantitative filter paper, ashless, Grade 40 circles, diam. 32 mm, pack of 100
WHA1440320 Whatman® quantitative filter paper, ashless, Grade 40 circles, diam. 320 mm, pack of 100
WHA1440329 Whatman® quantitative filter paper, ashless, Grade 40 circles, diam. 30 mm, pack of 100
WHA14406168 Whatman® quantitative filter paper, ashless, Grade 40 circles, diam. 450 mm, pack of 100