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Whatman™ Qualitative Filter Paper: Grade 4 Circles


Filters and retains course 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.

Manufacturer: whatman™  WHT1004320

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Catalog No. 09-825H

  • / Pack of 100 Each
 

Description & Specifications

Specifications

Porosity Medium
Flow Rate Fast
Particle Retention Coarse particles and gelatinous precipitates
Material Cellulose
Pore Size (Metric) 20 to 25μm
Thickness (Metric) 210μm
Quantity 100Pack
Format Circle
Grade 4
Diameter (Metric) 320mm

 

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

Accessories

Accessories for Catalog Number: 09825H

Item Mfr. No. Item Description Price Per Unit Quantity  
09-753-50
Fisherbrand™ Filter Forceps
fisherbrand™
SDI25510
Easy, effortless handling of membranes and glass fiber filters Each for $11.07