Whatman

Whatman Filter Paper, round, Grade 91, 190 mm, wet-strengthened, 1000 pc/PAK

Name: Whatman Filter Paper, round, Grade 91, 190 mm, wet-strengthened, 1000 pc/PAK
Brand: Whatman

Whatman Grade 91 is a filter paper equivalent to Munktell 55/N Properties: Medium speed filtration Filtration speed 70 s/100 ml A general purpose creped filter for less critical routine analysis. Used primarily for sucrose samples from cane sugar and in 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. Some wet strengthened grades are available in folded (prepleated) forms. 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. Grade 91: 10 µm You may find the certificate here: <a href="httpMostra di più

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