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.

Overview
Brand: Whatman™

Manufacturer Part Number: 1004-027

UNSPSC: 41120000

Code: A0

Additional Details:
Additional Details: Weight: 0.03000kg



Product Code. 11370444

Quantity Price
1 £ 28.52 / Pack of 400
Estimated Shipment
11-05-2017
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Description and Specification

Specification

Particle Retention Coarse particles and gelatinous precipitates
Quantity 400Pack
Flow Rate Fast
Material Cellulose
Porosity Medium
Thickness (Metric) 210μm
Pore Size (Metric) 20 to 25μm
Format Circle
Diameter (Metric) 27mm
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