Whatman Grade 1 Qualitative Filter Papers - 11μm

The most widely used filter paper for routine applications with medium retention and flow rate. Extended range of sizes includes 42.5 mm to 500 mm diameter circles and 460 mm x 570 mm sheets.

This grade covers a wide range of laboratory applications and is frequently used for clarifying liquids. Traditionally the grade is used in qualitative analytical separations for precipitates such as lead sulfate, calcium oxalate (hot) and calcium carbonate.

In agriculture, it is used for soil analysis and seed testing procedures. In the food industry, Grade 1 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 paper is impregnated with a chromogenic reagent and color formation quantified by optical reflectance.

 Diameter  Part Number
 Price
 42.5 mm  1001-042  $19.40 / Pack 100
 47 mm  1001-047  $19.40 / Pack 100
 55 mm  1001-055  $21.59 / Pack 100
 70 mm  1001-070  $21.59 / Pack 100
 90 mm  1001-090  $26.05 / Pack 100
 110 mm  1001-110  $31.69 / Pack 100
 125 mm  1001-125  $31.69 / Pack 100
 150 mm  1001-150  $44.86 / Pack 100
 185 mm  1001-185  $60.36 / Pack 100
 240 mm  1001-240  $94.64 / Pack 100
 270 mm  1001-270  $114.43 / Pack 100
 320 mm  1001-320  $156.30 / Pack 100
 385 mm  1001-385  $253.19 / Pack 100
 400 mm  1001-400  $253.19 / Pack 100
 500 mm  1001-500  $314.81 / Pack 100
 460 x 570 mm
 1001-917  $344.58 / Pack 100
 1001-918  $1532.69 / Pack 500

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