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Whatman™ Grade 40 Quantitative Filter Paper

Supports accurate analysis in applications sensitive to very low levels of background contamination and in gravimetric analysis. Whatman™ Grade 40 Quantitative Filter Paper are useful where ash content might affect weight measurements of combusted samples.

Manufacturer: whatman™  1440-185

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Catalog No. 09-845G

  • / Pack of 100 Each

Description & Specifications


Quantity 100Pack
Grade 40
Material High-quality Cotton Linters
Pore Size (Metric) 8μm
Format Circle
Thickness (Metric) 210μm
Porosity Medium
Diameter (Metric) 185mm
For Use With (Application) Medium crystalline precipitates: calcium oxalate, well-digested barium. Normal loading; limited wet strength
Flow Rate Medium

High-purity filters for quantitative analysis

  • Contain 0.007% maximum ash content
  • Medium nominal particle retention rating of 8µm
  • Medium filtration speed (Herzberg 340 sec.)
  • Particularly useful for gravimetric analysis

Suited for
  • Soil analysis, when separating solid matter from aqueous extracts
  • Quantitative determination of milk sediment
  • Use as a clean-up filter for solutions prior to atomic absorption (AA) spectrometry
  • Analysis of constituent components in cements, clays, iron, and steel products
  • Collection of trace elements and radionuclides from the atmosphere


Accessories for Catalog Number: 09845G

Item Mfr. No. Item Description Price Per Unit Quantity