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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.

$38.40 - $657.98

Specifications

Material High-quality Cotton Linters
Format Circle
Grade 40
Pore Size (Metric) 8μm
Porosity Medium
View More Specs
Products
Catalog Number Mfr. No. Diameter (Metric) Price Quantity    

09-845A

  Accessories
whatman™
1440-055
55mm Pack of 100 Each for $52.71

09-845B

  Accessories
whatman™
1440-070
70mm Pack of 100 Each for $54.83

09-845C

  Accessories
whatman™
1440-090
90mm Pack of 100 Each for $76.25

09-845D

  Accessories
whatman™
1440-110
110mm Pack of 100 Each for $90.46

09-845G

  Accessories
whatman™
1440-185
185mm Pack of 100 Each for $200.96

09-845F

  Accessories
whatman™
1440-150
150mm Pack of 100 Each for $136.02

09-845E

  Accessories
whatman™
1440-125
125mm Pack of 100 Each for $102.56

09-845K

  Accessories
whatman™
1440-240
240mm Pack of 100 Each for $318.08

09-845M

  Accessories
whatman™
1440-320
320mm Pack of 100 Each for $657.98

09-845H

  Accessories
whatman™
1440-042
42.5mm Pack of 100 Each for $47.71

09-845J

  Accessories
whatman™
1440-329
30mm Pack of 100 Each for $38.40

09-800-969

 
whatman™
1440-047
47mm Pack for $49.73
Description & Specifications

Specifications

Material High-quality Cotton Linters
Format Circle
Grade 40
Pore Size (Metric) 8μm
Porosity Medium
Flow Rate Medium
Thickness (Metric) 210μm

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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