Whatman Grade 40 Quantitative Ashless Filter Paper, Medium Fine Precipitates Retained, 9 cm

Cytiva® Whatman® Grade 40 Quantitative Ashless Filter Paper, Medium Fine Precipitates Retained, 9 cm, 1440-090

Features:

• High-purity, general-purpose papers for quantitative analysis
• Suitable for a variety of analytical filtration applications
• High-purity filters contain 0.007% maximum ash content
• Medium nominal particle retention rating of 8 µm
• Medium filtration speed (Herzberg 340 s)
• Particularly useful for gravimetric analysis
• Whatman® offers a wide range of ashless filter paper for gravimetric analysis
• Use hardened ashless grades if analysis involves strong acid/alkali suspensions
• High-purity filters support accurate analysis in applications sensitive to very low levels of background contamination and in gravimetric analysis where ash content might affect weight measurements of combusted samples

Applications:

• 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