Whatman Filter Paper - Grade 91 Circles (Whatmans Grade 91)

Whatman Filter Paper - Grade 91 Circles (Whatmans Grade 91)

SKU WHATMANS GRADE 91 Categories ,

These extremely strong filter papers have a high wet strength due to the addition of a small quantity of chemically stable resin.

Code Whatmans Grade 91
  • Normal qualitative applications will not introduce any significant impurities into the filtrate.
  • The resins do, however, contain nitrogen so these grades should not be used in Kjeldahl estimations, etc.
  • Some wet strengthened grades are available in folded (pre-pleated) forms.

Grade 91 (10 µm):

  • A general-purpose creped filter for less critical routine analysis.
  • Widely used to assay sucrose in cane sugar and within pharmaceutical laboratories for routine filtration.

Available in the following Sizes:

  • 110mm (100 P/Box)
  • 125mm (100 P/Box)
  • 150mm (100 P/Box)
  • 185mm (100 P/Box)
  • 240mm (100 P/Box)

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