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Whatman™ 1442-917
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Whatman™ Grade 42 Ashless Quantitative Filter Paper, 460 x 570 mm

Quantitative Filter Paper, 460 x 570 mm, Cotton Linters, Grade 42, Ashless Grade Type, Sheet Format, 200 µm Thickness, 2.5 µm Particle Retention in Liquid, 100 g/m2 Nominal Basis Weight, 1870 secs/100 ml (Herzberg) Filtration Speed

  • Manufacturer Part No: 1442-917
  • SECO Part No: GEH-1442-917
  • Sold As:
  • Availability: loading

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. 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.

Grade : Grade 42
Dimension : 460 x 570 mm
Material (ml/min) : High-quality Cotton Linters
Ash Content : 0.007%
Sterility : Non-sterile
Grade Type : Ashless
Type : Quantitative
Dry Burst Pressure : 172 kPa/25 psi
Filtration Speed : 1870 sec/100 ml (Herzberg)
Format : Sheet
Nominal Air Flow Rate : 96 sec/100 ml/in2
Nominal Basis Weight : 100 g/m2
Particle Retention in Liquid : 2.5 µm
Properties : Slow
Thickness : 200 µm
Typical Water Flow Rate : 5 ml/min
Wet Burst Pressure : 2.8 kPa/0.40 psi
Alpha Cellulose Content : =98%
Loading Capacity : N
  • For Instrumental analysis
  • 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
  • Designed for gravimetric analysis and the preparation of samples for instrumental analysis, for critical gravimetric analysis with the finest particle retention

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