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Whatman Grade 540 Quantitative Hardened Ashless Filter Papers

Whatman Grade 540 Quantitative Hardened Ashless Filter Papers are a high-purity, acid-treated cellulose lab filter paper. Mechanically strong Grade 540 is well suited for quantitative or gravimetric filter during analysis of metals in acidic or alkaline solutions and in the collection of hydroxides. The acid-treated surface prevents tearing during filtration and allows the user to scrape precipitates from the paper.

  • Acid-treated for high wet-strength
  • Extremely low ash content (0.006% ash maximum)
  • Nominal particle retention of 8 ┬Ám
  • Medium flow rate (Herzberg filtration speed 200 s)
  • High chemical resistance to strong acid and alkali suspensions
Part NumberDiameterQuantityPrice
1540-042 42.5 mmPack/100$39.04
1540-055 55 mmPack/100$43.48
1540-090 90 mmPack/100$71.77
1540-110 110 mmPack/100$86.91
1540-125 125 mmPack/100$99.91
1540-150 150 mmPack/100$141.27
1540-185 185 mmPack/100$208.63
1540-240 240 mmPack/100$319.53
1540-320 320 mmPack/100$681.21