Whatman Filter Paper - Grade 41 Circles (Whatmans Grade 41)

Whatman Filter Paper - Grade 41 Circles (Whatmans Grade 41)

SKU WHATMANS GRADE 41 Categories ,

Whatman quantitative filters are designed for gravimetric analysis and the preparation of samples for instrumental analysis.

Code Whatmans Grade 41
  • They are available in three formats designed to meet your specific needs.
  • Ash-less: 0.007% ash maximum for Grades 40 to 44 and a maximum of 0.01% for the 589 Grades – very pure filters suitable for a wide range of critical analytical filtration procedures
  • Hardened low ash: 0.015% ash maximum – treated with a strong acid to remove trace metals and produce high wet strength and chemical resistance.
  • These filters are particularly suitable for Büchner filtration where the tough smooth surface of the filter makes it easy to recover precipitates.
  • Hardened ash-less: 0.006% ash maximum – acid hardened to give high wet strength and chemical resistance with extremely low ash content.
  • The tough surface makes these filters suitable for a wide range of critical filtration procedures.

Grade 41 (20 µm):

  • The fastest ash-less filter paper, recommended for analytical procedures involving coarse particles or gelatinous precipitates (e.g., iron or aluminium hydroxides).
  • Also used in quantitative air pollution analysis as a paper tape for impregnation when determining gaseous compounds at high flow rates.
  • This filter is also available in the disposable filter funnel.
  • This is a convenient, disposable 47 mm filter funnel with a 250 ml capacity.
  • The 47 mm Grade 41 filter can be easily removed for further analysis or culturing.

Available in the following Sizes:

  • 55mm (100 P/Box)
  • 70mm (100 P/Box)
  • 90mm (100 P/Box)
  • 110mm (100 P/Box)
  • 125mm (100 P/Box)
  • 150mm (100 P/Box)
  • 185mm (100 P/Box)
  • 240mm (100 P/Box)
  • 320mm (100 P/Box)

Due to the continuous development of our products, the goods supplied may vary in detail to that illustrated on this Website.