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Whatman™ Quantitative Filter Paper: Grade 40 Circles

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

Manufacturer:  Whatman™ 1440185

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Catalog No. 09-845G


 

Specifications

Description

Filter Papers; Whatman; Quantitative; Grade 40 Papers; Circles; Contd.; Particle retention: 8μm; Surface: Smooth; Porosity: Medium; Filtration speed: Herzberg, 340 seconds; 18.5cm dia.

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

Specifications

100Pack
High-quality Cotton Linters
Circle
Medium
Medium crystalline precipitates: calcium oxalate, well-digested barium. Normal loading; limited wet strength
40
8μm
210μm
185mm
Medium
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