WHATMAN Grade 41 Quantitative Filter Paper, Ashless

GE Healthcare Life Sciences
The fastest ashless filter paper, recommended for analytical procedures involving coarse particles or gelatinous precipitates (e.g., iron or aluminum hydroxides). Also used in quantitative air pollution analysis as a paper tape for impregnation when determining gaseous compounds at high flow rates. The 47 mm Grade 41 filter can be easily removed for further analysis or culturing.
• Typical Properties
Description Fast
Particle Retention in Liquid (μm) 20
Filtration Speed (approx) Herzberg (s) -
Normal ash content (%) 0.007
Typical Thickness (μm) 215
Basis Weight (g/m2) 85
Typical water flow rate (ml/min)2 254
Nominal air flow rate (s/100 mL/in2) 4

• Ordering Information – Qualitative Filter Circles

Diameter (mm)

Catalog Number

Quantity/Pack

42.5

1441-042

100

47

1441-047

100

50

1441-050

100

55

1441-055

100

60

1441-060

100

70

1441-070

100

90

1441-090

100

110

1441-110

100

125

1441-125

100

150

1441-150

100

185

1441-185

100

240

1441-240

100

320

1441-320

100

203 × 254

1441-886

100

460 x 570

1441-917

100


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