Grade 42 – Whatman Filter Paper

$34.50$220.00 ex GST

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$152.00 ex GST

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Product Description

Whatman Filter Paper – Grade 42

Quantitative Grade

WET STRENGTH

L – Suitable for gravity or low suction filtration. Care must be taken to prevent rupture of paper

M – Will withstand all normal use on Buchner Funnels or others devices under suction or moderate pressure

H – High wet strength and high chemical resistance

Grade No

 

Flow rate

Retention microns

Wet Strength

Thickness, mm

Ash %

Ashless
42

Highly retentive for fine precipitates

Slow

2.5

L

0.20

0.01

The finest particle retention of all Whatman cellulose filter papers makes Grade 42 exceptional for critical gravimetric analysis. Typical precipitates filtered include:

  • Barium sulfate
  • Metastannic acid
  • Finely precipitated calcium carbonate

 

Grade Typical Particle Retention in Liquid (µm)1 Filtration Speed Herzberg (s) Nominal Ash Content (%)3 Nominal Thickness (µm) Nominal Basis Weight (g/m2) Typical Water Flow Rate (mL/min)2 Nominal Air Flow Rate (s/100 mL/in2)
42 2.5 0.007 200 100 5 96
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