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Picture of Whatman Grade 1 Qualitative Filter Papers

Whatman Grade 1 Qualitative Filter Papers

Whatman Grade 1 Qualitative Filter Papers are the most widely used filter paper for routine laboratory applications, qualitative analytical separations, and clarifying liquids. They are the standard grade cellulose filter papers for medium flow rates.
Grade 1 Qualitative Filter Papers (11 µm particle retention) are available in a variety of sizes and formats including circles, sheets and pre-pleated filters.

  • Qualitative analytical separations for precipitates such as lead sulfate, calcium oxalate (hot), and calcium carbonate
  • Agricultural soil analysis and seed testing procedures
  • Industrial food processing techniques to extract liquid or separate solid foodstuffs from associated liquid
  • Air pollution monitoring by collecting atmospheric dust from airflow and photometrically measuring the stain-intensity
  • Gas detection by quantitative chromogenesis with optical reflectance
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Part NumberDiameterQuantityPrice
1001-020 20 mmPack/400$87.20
1001-025 25 mmPack/400$76.72
1001-030 30 mmPack/400$76.72
1001-032 32 mmPack/100$19.95
1001-042 42.5 mmPack/100$19.95
1001-045 45 mmPack/100$11.76
1001-047 47 mmPack/100$19.95
1001-055 55 mmPack/100$22.77
1001-070 70 mmPack/100$22.77
1001-085 85 mmPack/100$25.64
1001-090 90 mmPack/100$28.57
1001-110 110 mmPack/100$34.07
1001-125 125 mmPack/100$34.07
1001-150 150 mmPack/100$51.13
1001-185 185 mmPack/100$71.20
1001-240 240 mmPack/100$113.85
1001-270 270 mmPack/100$139.41
1001-320 320 mmPack/100$193.61
1001-385 385 mmPack/100$318.67
1001-400 400 mmPack/100$318.67
1001-500 500 mmPack/100$397.33