WHATMAN Grade 50 Quantitative Filter Paper, Hardened Low Ash

CYTIVA
Retention of very fine crystalline precipitates. The thinnest of all Whatman filter papers with a slow flow rate, these filters have a hardened and highly glazed surface,
which also keeps the paper free from loose surface fibers. Highly suitable for qualitative or quantitative filtrations requiring vacuum assistance on Büchner or 3-piece filter funnels. Very strong when wet and will withstand wet handling and precipitate removal by scraping. In the electronics industry, the virtual absence of fiber shedding is utilized in carriers for integrated circuits. This grade is also available in Smear Tab format for wipe testing (e.g. testing of surfaces for radionuclide contamination).
• Typical Properties
Description Medium
Particle Retention in Liquid (μm) 2.7
Filtration Speed (approx) Herzberg (s) -
Normal ash content (%) 0.015
Typical Thickness (μm) 115
Basis Weight (g/m2) 96
Typical water flow rate (ml/min)2 10
Nominal air flow rate (s/100 mL/in2) 144

• Ordering Information – Qualitative Filter Circles

Diameter (mm)

Catalog Number

Quantity/Pack

42.5

1450-042

100

55

1450-055

100

70

1450-070

100

90

1450-090

100

110

1450-110

100

125

1450-125

100

150

1450-150

100

185

1450-185

100

240

1450-240

100

320

1450-320

100

500

1450-500

100

63.5

1450-6550

100

150 x 230 1450-916
100

460 x 570  1450-917 100
Smear Tab 1450-993 100

Offline Store


Online Store