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Whatman™ Grade 41 Quantitative Filter Paper

Serves as a paper tape for impregnation when determining gaseous compounds at high flow rates or for quantitative air pollution analysis. Whatman™ Grade 41 Quantitative Filter Paper is also used in preparing samples for metal analysis after nitric acid digestion.

Manufacturer: whatman™  1441-185

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Catalog No. 09-850L


Description & Specifications


Quantity 100Pack
Grade 41
Material High-quality Cotton Linters
Pore Size (Metric) 20μm
Format Circle
Thickness (Metric) 215μm
Porosity Coarse
Diameter (Metric) 185mm
Particle Retention Gelatinous precipitates and coarse particles
For Use With (Application) Metallurgy: iron and aluminum hydroxides. Air pollution monitoring. Normal loading; limited wet strength
Flow Rate Fast

Fast, ashless filter paper

  • Extremely low ash content (0.007% ash maximum)
  • 20µm nominal particle retention rating
  • Fast filtration speed (Herzberg 54 s)
  • Commonly used for routine air pollution analysis and soil pollution analysis


Accessories for Catalog Number: 09850L

Item Mfr. No. Item Description Price Per Unit Quantity  
Fisherbrand™ Filter Forceps
Easy, effortless handling of membranes and glass fiber filters Each for $10.80