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  5. Cytiva Whatman™ Qualitative Filter Paper: Grade 4 Circles

Cytiva Whatman™ Qualitative Filter Paper: Grade 4 Circles

Catalog No. 09825G Shop All Cytiva Products
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Diameter (Metric):
27 mm
41 mm
42.5 mm
47 mm
50 mm
55 mm
70 mm
90 mm
110 mm
125 mm
150 mm
185 mm
240 mm
270 mm
320 mm
400 mm
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Catalog No. Diameter (Metric)
09-825G 240 mm
09-927-836 27 mm
09-927-158 41 mm
09-825J 42.5 mm
09-927-837 47 mm
09-927-828 50 mm
09-825K 55 mm
09-825A 70 mm
09-825B 90 mm
09-825C 110 mm
09-825D 125 mm
09-825E 150 mm
09-825F 185 mm
09-825L 270 mm
09-825H 320 mm
09-825M 400 mm
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Catalog No. 09-825G Supplier Cytiva Supplier No. 1004240
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Description

Filters and retains coarse particles for monitoring air pollution. Whatman™ Qualitative Filter Paper: Grade 4 Circles are used when high flow rates in air pollution monitoring are required and the collection of fine particles is not critical.

 

These cellulose filters are used in qualitative analytical techniques to determine and identify materials and for clarifying liquids. 
  • Particle Retention: 25μm
  • Porosity: Coarse
  • Filtration speed: Herzberg, 37 sec.
  • Surface: smooth
  • Extremely fast filtering  with excellent retention of coarse particles and gelatinous precipitates such as ferric hydroxide and aluminum hydroxide
  • Useful as a rapid filter for routine clean-up of biological fluids or organic extracts during analysis
TRUSTED_SUSTAINABILITY

Specifications

Description Grade 4 Qualitative Filter Paper Standard Grade, circle, 240 mm
Format Disc
Material Cellulose
Particle Retention 25 μm
Pore Size 20 to 25 μm
Filtration Speed 37 sec.
Flow Rate Fast
For Use With (Application) A standard grade filter used when high flow rates in air pollution monitoring are required and the collection of fine particles is not critical.
Grade Grade 4
Porosity Medium
Quantity 100 Pk.
Thickness (Metric) 210 μm
Type Qualitative Filter Paper
Diameter (English) 9.44 in.
Diameter (Metric) 240 mm
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