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Whatman™ 1440-055
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Whatman™ Grade 40 Ashless Quantitative Filter Paper, 55 mm dia

Quantitative Filter Paper, 55 mm dia, Cotton Linters, Grade 40, Ashless Grade Type, Circle Format, 210 µm Thickness, 8 µm Particle Retention in Liquid, 95 g/m2 Nominal Basis Weight, 340 secs/100 ml (Herzberg) Filtration Speed

  • Manufacturer Part No: 1440-055
  • SECO Part No: 12-4810-02
  • Sold As:
  • Availability: loading

Whatman Grade 40 high-purity filters from GE Healthcare's Life Sciences business are general-purpose papers for quantitative analysis. Grade 40 filters are suitable for a variety of analytical filtration applications.

Diameter : 55 mm
Grade : Grade 40
Material (ml/min) : High-quality Cotton Linters
Ash Content : 0.007%
Sterility : Non-sterile
Grade Type : Ashless
Type : Quantitative
Dry Burst Pressure : 110 kPa/16 psi
Filtration Speed : 340 sec/100 ml (Herzberg)
Format : Circle
Nominal Air Flow Rate : 21 sec/100 ml/in2
Nominal Basis Weight : 95 g/m2
Particle Retention in Liquid : 8 µm
Properties : Medium
Thickness : 210 µm
Typical Water Flow Rate : 25 ml/min
Wet Burst Pressure : 2 kPa/0.29 psi
Alpha Cellulose Content : =98%
Loading Capacity : N
  • High-purity filters contain 0.007% maximum ash content
  • Medium nominal particle retention rating of 8 µm
  • Medium filtration speed (Herzberg 340 secs)
  • Particularly useful for gravimetric analysis
  • 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
  • For analysis of constituent components in cements, clays, iron and steel products
  • Collection of trace elements and radionuclide's from the atmosphere

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