Whatman™ Grade 40 Quantitative Filter Paper Available on GSA/VA Contract for Federal Government customers only.

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™ 1440070

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Catalog No. 09-845B

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    Specifications

    Quantity 100Pack
    Grade 40
    Material High-quality Cotton Linters
    Pore Size (Metric) 8μm
    Format Circle
    Thickness (Metric) 210μm
    Porosity Medium
    Diameter (Metric) 70mm
    For Use With (Application) Medium crystalline precipitates: calcium oxalate, well-digested barium. Normal loading; limited wet strength
    Flow Rate Medium

    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.

    • 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.)

    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

  • Description & Specifications

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