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  5. Cytiva Whatman™ Quantitative Filter Paper: Grade 40 Circles

Cytiva Whatman™ Quantitative Filter Paper: Grade 40 Circles

Product Code. 11392935
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Diameter (Metric):
12.7 mm
30 mm
32 mm
42.5 mm
47 mm
55 mm
70 mm
90 mm
110 mm
125 mm
150 mm
185 mm
240 mm
320 mm
450 mm
Unit Size:
Pack of 100
Pack of 400
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Product Code. Diameter (Metric) unitSize
11392935 90 mm Pack of 100
11370454 12.7 mm Pack of 400
10460642 32 mm Pack of 100
11352935 42.5 mm Pack of 100
11362935 47 mm Pack of 100
10674122 55 mm Pack of 100
11382935 70 mm Pack of 100
11302945 110 mm Pack of 100
11312945 125 mm Pack of 100
11322945 150 mm Pack of 100
11332945 185 mm Pack of 100
11342945 240 mm Pack of 100
11390454 320 mm Pack of 100
11380454 30 mm Pack of 100
11300464 450 mm Pack of 100
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Product Code. 11392935 Supplier Cytiva Supplier No. 1440090
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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
TRUSTED_SUSTAINABILITY

Specifications

Airflow Rate 21 s/100 mL/in2
Description Grade 40 Ashless Filter Paper for Pollution Analysis, 90 mm circle (100 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) 3.54 in.
Diameter (Metric) 90 mm
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