Biotechnology
 
    Filtre en cellulose de Whatman

Filtre en cellulose de Whatman


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Whatman cellulose filters are manufactured from high quality cotton linters which have been treated to achieve a minimum alpha cellulose content of 98%. These cellulose filter papers are used for general filtration and exhibit particle retention levels down to 2.5 µm. Whatman offers a wide choice of retention and flow rate combinations to suit numerous laboratory applications.

The different groups of cellulose filters offer increasing degrees of purity, hardness, and chemical resistance.

Cellulose Filter Selection - Trace Elements: typical values (ug/g of paper)
Grade142542Grade142542
Aluminum< 0.521Iron563
Antimony < 0.02< 0.02< 0.02Lead0.30.20.1
Arsenic< 0.02< 0.02< 0.02Magnesium71.80.7
Barium< 1< 1< 1Manganese0.060.050.05
Boron112Mercury< 0.005< 0.005< 0.005
Bromine111Nitrogen2312260
Calcium185138Potassium31.50.6
Chlorine1308055Silicon20< 2< 2
Chromium0.30.30.7Sodium160338
Copper 1.20.30.2Sulfur15< 5< 2
Fluorine0.10.20.3Zinc2.40.60.3