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Cytiva Whatman™ Qualitative Filter Paper: Grade 4 Circles

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.

Supplier:  Cytiva WHT1004110

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Catalog No. 09-825C


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Description

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: 25ÎĽm
  • 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

Specifications

Grade 4 Qualitative Filter Paper Standard Grade, circle, 110 mm
Cellulose
20 to 25 ÎĽm
Fast
Grade 4
100 Pk.
Qualitative Filter Paper
110 mm
Disc
25 ÎĽm
37 sec.
A standard grade filter used when high flow rates in air pollution monitoring are required and the collection of fine particles is not critical.
Medium
210 ÎĽm
4.33 in.
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