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Whatman Quantitative Filter Papers, Hardened Low Ash Grades, Grade 52, GE Healthcare


GE’s Whatman Grade 52 is a general-purpose filter paper for quantitative analysis in Büchner funnel and other vacuum filtrations. The acid-hardened surface and low ash content enable efficient precipitate recovery.

  • Manufactured from high-quality cotton linters and treated to remove trace metals
  • High wet-strength and chemical resistance
  • Nominal particle retention of 7 µm
  • Medium flow rate (Herzberg filtration speed 235s)
  • High purity (0.015% ash maximum)
  • Compatible with Hirsch or Büchner funnel applications
GE Healthcare’s Life Sciences business offers three grades of hardened low ash filter paper. All three are designed for use in Hirsch and Büchner funnel applications and can be customized for an exact fit. The quality of analysis resulting from vacuum filtration using a Hirsch or Büchner funnel relies on using a high-quality filter that avoids introducing artifacts into measurement. GE’s Grade 52 hardened filter paper is acid-treated to prevent fiber shredding during vacuum filtration or precipitate collection.



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Description Grade Size Material Diameter Type Supplier No. Catalog Number Unit List Price Quantity
Grade 52 Filter for Quantitative Analysis, General, 125 mm circle (100 pcs) Grade 52 100 Pieces High-quality cotton linters 125 mm Hardened low ash 1452-125 F-2816-125 Pack of 100 Retrieving


Airflow Rate 15s/100 mL/in²
Ash Content 0.015% (Ash is determined by ignition of the cellulose filter at 900°C in air)
Basis Weight 101 g/m²
Filtration speed 235 s
Flow rate Medium
Particle retention 7 µm (Particle retention rating at 98% efficiency), in Liquid Max.
Tensile Strength 71.5 N/15 mm, Tensile M/D Dry
Thickness 175 µm (Typical)
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