Whatman

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Whatman Qualitative Filter Papers, Grade 4 Circles, 110 mm, 100/pk

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$31.95

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Description

Features of the Whatman Qualitative Filter Papers:

Used in air-pollution monitoring and routine cleanup of biological fluids.

Retains coarse particles, gelatinous precipitates.

Particle Retention: > 20-25µm.

Porosity: Coarse.

Filtration speed: ASTM*, 12 sec.; Herzberg, 37 sec.

Surface: smooth.

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