Cytiva Whatman™ Quantitative Filter Paper: Grade 40 Circles

Description

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.

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