Whatman™ Quantitative Filter Paper: Grade 40

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. No. per Pack: 100 Airflow Rate: 21 s/100 mL/in2 Material: Cotton Linters Filtration Speed: ASTM, 75 seconds; Herzberg, 340 seconds For Use With (Application): Designed for gravimetric analysis and the preparation of samples for instrumental analysis. Gravimetric analysis for numerous components in cements, clays, iron, and steel products. As a primary filter for separating solid matter from aqueous extracts in soil analysis, 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. Porosity: Medium Thickness (Metric): 210 μm Diameter (Metric): 47 mm Format: Disc Particle Retention: 8 μm Flow Rate: Medium Grade: Grade 40 Quantity: 100 Pk. Type: Quantitative Filter Paper Diameter (English): 1.85 in. Currency: EUR Category: Filters and Filtration Sub Category: Filter Paper