WHATMAN Grade 91 Wet strengthened Filter Paper

CYTIVA

A general purpose creped filter for less critical routine analysis. Widely used to assay sucrose in cane sugar and within pharmaceutical laboratories for routine filtration. These extremely strong filter papers have a high wet strength due to the addition of a small quantity of chemically stable resin. Normal qualitative applications will not introduce any significant impurities into the filtrate. The resins do, however, contain nitrogen so these grades should not be used in Kjeldahl estimations, etc. 

• Typical Properties

Description Creped
Particle Retention in Liquid (μm) 10
Filtration Speed (approx) Herzberg (s) -
Air Flow (s/100 ml/in2) 6
Typical Thickness (μm) 205
Basis Weight (g/m2) 65
Typical water flow rate (ml/min)2 274

• Ordering Information

Diameter (mm)

Catalog Number

Quantity/Pack

110

1091-110 4000

125

1091-125 4000

150

1091-150 1000

165

1091-165 1000

185

1091-185 1000

190

1091-190 1000

240

1091-240 1000

580 x 580

1091-930 500
610 x 610 1091-935 500