WHATMAN Grade 42 Quantitative Filter Paper, Ashless

GE Healthcare Life Sciences
Used for critical gravimetric analysis with the finest particle retention of all Whatman cellulose filter papers. Typical analytical precipitates include barium sulfate, metastannic acid, and finely precipitated calcium carbonate.
• Typical Properties
Description Slow
Particle Retention in Liquid (μm) 2.5
Filtration Speed (approx) Herzberg (s) -
Normal ash content (%) 0.007
Typical Thickness (μm) 200
Basis Weight (g/m2) 100
Typical water flow rate (ml/min)2 5
Nominal air flow rate (s/100 mL/in2) 96

• Ordering Information – Qualitative Filter Circles

Diameter (mm)

Catalog Number

Quantity/Pack

42.5

1442-042

100

47

1442-047

100

55

1442-055

100

70

1442-070

100

90

1442-090

100

110

1442-110

100

125

1442-125

100

150

1442-150

100

185

1442-185

100

240

1442-240

100

320

1442-320

100

25.4 × 90 1442-6551

100

460 x 570 1441-917

100

Flag shape

1442-971

100


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