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Whatman™ Quantitative Filter Paper: Grade 41 Circles

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

Manufacturer: whatman™  WHT1441090

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Catalog No. 09-850B

  • / Pack of 100 Each

Description & Specifications


For Use With (Application) Metallurgy: iron and aluminum hydroxides. Air pollution monitoring. Normal loading; limited wet strength
Thickness (Metric) 215μm
Quantity 100Pack
Flow Rate Fast
Material High-quality Cotton Linters
Diameter (Metric) 90mm
Particle Retention Gelatinous precipitates and coarse particles
Pore Size (Metric) 20μm
Format Circle
Porosity Coarse
Grade 41

Ashless grades are very pure filters suitable for a wide range of critical analytical filtration procedures. Whatman™ quantitative filter papers are designed for gravimetric analysis and the preparation of samples for instrumental analysis.

  • 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
  • High-purity filters for quantitative analysis


Accessories for Catalog Number: 09850B

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