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

Cytiva Whatman™ Qualitative Filter Paper: Grade 4 Circles

Numéro de catalogue. 09825D
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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
16 product options available for selection
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Numéro de catalogue. Diameter (Metric)
09825D 125 mm
09927836 27 mm
09927158 41 mm
09825J 42.5 mm
09927837 47 mm
09927828 50 mm
09825K 55 mm
09825A 70 mm
09825B 90 mm
09825C 110 mm
09825E 150 mm
09825F 185 mm
09825G 240 mm
09825L 270 mm
09825H 320 mm
09825M 400 mm
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Numéro de catalogue. 09825D Fournisseur Cytiva Code fournisseur 1004125
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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

Specifications

Description Grade 4 Qualitative Filter Paper Standard Grade, circle, 125 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) 4.92 in.
Diameter (Metric) 125 mm
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