Whatman™ Quantitative Filter Papers, Hardened Low Ash Grades, Grade 50, Whatman products (Cytiva)

Supplier: Cytiva
1450-042 1450-055 1450-070 1450-090 1450-110 1450-125 1450-150 1450-185 1450-240 1450-993 1450-320 1450-500 1450-916 1450-917 1450-063
28485-019PK 39.47 USD
28485-019 28485-020 28485-041 28485-063 28485-085 28485-100 28485-121 28485-143 28485-165 70240-144 10035-274 10035-276 10035-278 10035-280 76419-604
Whatman™ Quantitative Filter Papers, Hardened Low Ash Grades, Grade 50, Whatman products (Cytiva)
Filters Filter Paper Quantitative Filter Paper
Whatman Grade 50 quantitative hardened low ash filter paper is highly glazed to enable recrystallization of very fine precipitates using Büchner funnel or Hirsch funnel filtration.

  • Thinner filter design (average thickness 115 µm) than most Büchner filter papers
  • Nominal particle retention of 2.7 µm
  • Slow flow rates (Herzberg filtration speed 2685 s)
  • High purity and low ash content (0.015% ash maximum)
  • Acid-treated for high wet-strength and chemical resistance
  • Hardened to minimize fiber shredding

This hard, very thin, high wet-strength Grade 50 quantitative filter paper withstands wet handling and precipitate removal by scraping. With very minimal fiber shedding, they are an especially good choice for use as carriers in integrated circuits.

Whatman low ash hardened filter paper for quantitative analysis is available in three grades. All three are designed for use in gravity and vacuum suction filtration in Buchner and Hirsch funnels. Grade 50 is also available in Smear Tab format for wipe testing, such as surface testing for radionuclide contamination.
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