Whatman™ Qualitative Filter Paper: Grade 4 Circles
Whatman™ Qualitative Filter Paper: Grade 4 Circles
Actual product may vary
Fisher Catalogue

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.
Have Questions?
Change viewbuttonViewtableView
Catalog NumberDiameter (Metric)
FKS11392845125 mm
FKS1137284590 mm
FIS09-825D125 mm
FKS10614941150 mm
FIS09-825L270 mm
Catalog number FKS11392845
View Price:Sign in to see your account pricing. Need an account? Register with us today.
Diameter (Metric):
125 mm
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
DescriptionGrade 4 Qualitative Filter Paper Standard Grade, circle, 125 mm
FormatDisc
MaterialCellulose
Particle Retention25 μm
Pore Size20 to 25 μm
Filtration Speed37 sec.
Flow RateFast
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.
GradeGrade 4
PorosityMedium
Quantity100 Pk.
Thickness (Metric)210 μm
TypeQualitative Filter Paper
Diameter (English)4.92 in.
Diameter (Metric)125 mm
Unit SizePK