Whatman® Grade 1 Qualitative Filter Paper

Whatman® Grade 1 filter paper is the most widely used filter paper for routine applications with medium retention and flow rate. It has particle retention of 11 μm at 98% efficiency. It covers a wide range of laboratory applications and is frequently used for clarifying liquids. Traditionally, Grade 1 filter paper is used in qualitative analytical separations for precipitates such as lead sulfate, calcium oxalate (hot), and calcium carbonate.

In agriculture, Grade 1 is used for soil analysis and seed testing procedures. In the food industry, it is used for numerous routine techniques to separate solid foodstuffs from associated liquid, or extracting liquid and is widely used in education for teaching simple qualitative analytical separations.

In air pollution monitoring, using circles or rolls, atmospheric dust is collected from airflow and the stain intensity measured photometrically. For gas detection, the filter paper is impregnated with a chromogenic reagent and color formation quantified by optical reflectance.

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WHA2200185 Whatman® 1PS phase separator filter papers circles, diam. 185 mm, pack of 100
WHA2200240 Whatman® 1PS phase separator filter papers circles, diam. 240 mm, pack of 100
WHA10016508 Whatman® qualitative filter paper, Grade 1 circles, diam. 10 mm, pack of 500
WHA10010155 Whatman® qualitative filter paper, Grade 1 circles, diam. 15 mm, pack of 500
WHA1001325 Whatman® qualitative filter paper, Grade 1 circles, diam. 25 mm, pack of 100
WHA1001042 Whatman® qualitative filter paper, Grade 1 circles, diam. 42.5 mm, pack of 100
WHA1001055 Whatman® qualitative filter paper, Grade 1 circles, diam. 55 mm, pack of 100
WHA1001070 Whatman® qualitative filter paper, Grade 1 circles, diam. 70 mm, pack of 100
WHA1001090 Whatman® qualitative filter paper, Grade 1 circles, diam. 90 mm, pack of 100
WHA1001110 Whatman® qualitative filter paper, Grade 1 circles, diam. 110 mm, pack of 100
WHA1001125 Whatman® qualitative filter paper, Grade 1 circles, diam. 125 mm, pack of 100
WHA1001150 Whatman® qualitative filter paper, Grade 1 circles, diam. 150 mm, pack of 100
WHA1001185 Whatman® qualitative filter paper, Grade 1 circles, diam. 185 mm, pack of 100
WHA1001240 Whatman® qualitative filter paper, Grade 1 circles, diam. 240 mm, pack of 100
WHA1001270 Whatman® qualitative filter paper, Grade 1 circles, diam. 270 mm, pack of 100
WHA1001320 Whatman® qualitative filter paper, Grade 1 circles, diam. 320 mm, pack of 100
WHA1001400 Whatman® qualitative filter paper, Grade 1 circles, diam. 400 mm, pack of 100
WHA1001500 Whatman® qualitative filter paper, Grade 1 circles, diam. 500 mm, pack of 100
WHA1001020 Whatman® qualitative filter paper, Grade 1 circles, diam. 20 mm, pack of 400
WHA1001929 Whatman® qualitative filter paper, Grade 1 sheets, W × L 600 mm × 600 mm, pack of 100
Z695122 Whatman® qualitative filter paper, Grade 1 sheets, W × L 460 mm × 570 mm, pack of 100
WHA1001918 Whatman® qualitative filter paper, Grade 1 sheets, W × L 460 mm × 570 mm, pack of 500
WHA1001931 Whatman® qualitative filter paper, Grade 1 sheets, W × L 580 mm × 680 mm, pack of 100
WHA1001824 Whatman® qualitative filter paper, Grade 1 sheets, W × L 75 mm × 100 mm, pack of 500
WHA1001917 Whatman® qualitative filter paper, Grade 1 sheets, W × L 460 mm × 570 mm, pack of 100
WHA1001329 Whatman® qualitative filter paper, Grade 1 circles, diam. 30 mm, pack of 100
WHA1001032 Whatman® qualitative filter paper, Grade 1 circles, diam. 32 mm, pack of 100
WHA1001047 Whatman® qualitative filter paper, Grade 1 circles, diam. 47 mm, pack of 100
WHA1001813 Whatman® qualitative filter paper, Grade 1 sheets, W × L 26 mm × 31 mm, pack of 1000
WHA1001030 Whatman® qualitative filter paper, Grade 1 circles, diam. 30 mm, pack of 400
WHA1001025 Whatman® qualitative filter paper, Grade 1 circles, diam. 25 mm, pack of 400
WHA1001085 Whatman® qualitative filter paper, Grade 1 circles, diam. 85 mm, pack of 100
WHA1001385 Whatman® qualitative filter paper, Grade 1 circles, diam. 385 mm, pack of 100
WHA1001045 Whatman® qualitative filter paper, Grade 1 circles, diam. 45 mm, pack of 100
WHA1001932 Whatman® qualitative filter paper, Grade 1 sheets, W × L 580 mm × 680 mm, pack of 500