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

Specifications

• Airflow Rate: 21 s/100 mL/in²
• Description: Grade 40 Ashless Filter Paper for Pollution Analysis, 12.7 mm circle (400 pcs)
• Filter Type: Ashless
• Format: Disc
• Material: Cotton Linters
• Particle Retention: 8 μm
• Pore Size: 8 μm
• Filtration Speed: ASTM, 75 seconds; Herzberg, 340 seconds
• Flow Rate: Medium
• 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
• Grade: Grade 40
• Porosity: Medium
• Quantity: 100 Pk.
• Thickness (Metric): 210 μm
• Type: Quantitative Filter Paper
• Diameter (English): 0.5 in.
• Diameter (Metric): 12.7 mm