Whatman 1113-500 Qualitative Filter Paper Wet-Strengthened Grade 113, circle, 500 mm, 100 per pack
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.Ultra high loading capacity with a particle retention well suited for use with coarse or gelatinous precipitates. Fastest flow rate of the qualitative grades. Creped surface. Thickest filter paper in the qualitative range. This filter is also available in the FilterCup, a convenient, disposable 7 mm filter funnel with a 25 ml capacity, molded from polypropylene with an integral, heat bonded filter. Also available as Grade 113V.
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