Grade 42 Ashless Filter Paper for Instrumental Analysis, Circle & Sheet

GE’s Whatman Grade 42 quantitative papers have the finest retention of all Whatman ashless filter paper grades. Grade 42 is designed for gravimetric analysis and sample preparation for instrumental analysis.

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Description

  • Ashless: 0.007% ash maximum
  • Fine (2.5 µm) nominal particle retention rating, eliminates large particles that might otherwise interfere with sensitive instrumentation
  • Herzberg filtration speed of 1870 s
  • Commonly used as a calcium carbonate filter

Whatman quantitative papers come in a variety of particle retentions. Also see hardened ashless grades for work with strong acids or bases.

Ashless paper for gravimetric and instrumental analysis

Whatman Grade 42 quantitative papers from GE Healthcare’s Life Sciences business are designed for retention of extremely small particles. A common example is use of Grade 42 as a calcium carbonate filter for analysis in the cement industry.

Other typical precipitates for gravimetric analysis include barium sulfate and metastannic acid for use in glazes, coatings, and pigments. The high purity of GE’s Grade 42 filters also makes them suitable for processes that require ashing.

   Parameter Grade 42 Ashless Filter Paper for Instrumental Analysis, Circle & Sheet
   Grade : Grade 42
   Grade Type : Ashless
   Typical Particle Retention in Liquid1    : 2.5 µm
   Nominal Thickness : 200 µm
   Typical water flow rate2 : 5 ml/min
   Nominal Basis Weight : 100 g/m²
   Nominal Air Flow Rate : 96 s/100 mL/in²
   Nominal Ash Content3 : 0.007%
   Material : High-quality cotton linters
   Alpha Cellulose Content Min. : ≥98%
   Typical Trace Element Levels: Aluminium 2.5 µg/g Antimony less than 0.5 µg/g Arsenic less than 0.5 µg/g Barium less than 0.5 µg/g Boron less than 1 µg/g Calcium 8.3 µg/g Chromium 1.5 µg/g Copper 2 µg/g Iron 12 µg/g Lead less than 0.5 µg/g Magnesium 4 µg/g Manganese less than 0.5 µg/g Mercury less than 0.5 µg/g Potassium 2.3 µg/g Silicon 6.2 µg/g Sodium 16.8 µg/g Zinc 64.5 µg/g
   Application : Designed for gravimetric analysis and the preparation of samples for instrumental analysis. For critical gravimetric analysis with the finest particle retention.
   Format & Dimensions : Circle – Ø42.5 mm, Ø47 mm, Ø55 mm, Ø70 mm, Ø90 mm, Ø110 mm, Ø125 mm, Ø150 mm, Ø185 mm, Ø240 mm, Ø320 mm

Sheet – 25.4 x 90 mm, 460 x 570 mm, Flag sheet

   Pack Size : 100 pieces
  • 1Particle retention rating at 98% efficiency.
  • 2For 9 cm diameter
  • 3Ash is determined by ignition of the cellulose filter at 900°C in air.

Order now

To make your order, please contact us at  info@polyscientific.com.my or call us at +6 06 3350 690

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