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Whatman® qualitative filter paper: 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. Some wet strengthened grades are available in folded (prepleated) forms.
ID-N° 12128 – 150mm diameter
ID-N° 12634 – 140mm diameter
Material
cellulose filters
circles
Packaging
pack of 100
Parameter
2 psi wet burst
70 sec/100 mL speed (Herzberg)
Diameter
150 mm or 140mm
Thickness
205 μm
Pore size
10 μm (Particle retention)
Weight
71 g/m2
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