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.

Brand:  Whatman™ 1440-240

Product Code. 11342945

Description

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

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Specifications

• Quantity: 100Pack
• Material: High-quality Cotton Linters
• Format: Circle
• Porosity: Medium
• For Use With (Application): Medium crystalline precipitates: calcium oxalate, well-digested barium. Normal loading; limited wet strength

• Grade: 40
• Pore Size (Metric): 8μm
• Thickness (Metric): 210μm
• Diameter (Metric): 240mm
• Flow Rate: Medium