WHATMAN Grade 1 Qualitative Filter Paper

GE Healthcare Life Sciences
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.
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.
• Typical Properties

Description Medium flow
Particle Retention in Liquid (μm) 11
Filtration Speed (approx) Herzberg (s) 150
Air Flow (s/100 ml/in²) 10.5
Typical Thickness (μm) 180
Basis Weight (g/m²) 88

• Ordering Information – Qualitative Filter Circles

Diameter (mm)

Catalog Number

Quantity/Pack

25

1001-025

400

42.5

1001-042

100

45

1001-045

100

47

1001-047

100

55

1001-055

100

70

1001-070

100

85

1001-085

100

90

1001-090

100

110

1001-110

100

125

1001-125

100

150

1001-150

100

185

1001-185

100

240

1001-240

100

270

1001-270

100

320

1001-320

100

325

1001-325

100

329

1001-329

100

460 x 570

1001-917

100

460 x 570

1001-918

500

600 x 600

1001-929

100

580 x 680

1001-931

100



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