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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™  WHT1004070

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Catalog No. 09-825A

  • / Pack of 100 Each
 

Description & Specifications

Specifications

Porosity Medium
Quantity 100Pack
Thickness (Metric) 210μm
Pore Size (Metric) 20 to 25μm
Particle Retention Coarse particles and gelatinous precipitates
Flow Rate Fast
Material Cellulose
Format Circle
Diameter (Metric) 70mm
Grade 4

 

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: 09825A

Item Mfr. No. Item Description Price Per Unit Quantity