Filtre en cellulose de Whatman

General Electric - Grade 1, 42, 542

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Description

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)
Grade	1	42	542	Grade	1	42	542
Aluminum	< 0.5	2	1	Iron	5	6	3
Antimony	< 0.02	< 0.02	< 0.02	Lead	0.3	0.2	0.1
Arsenic	< 0.02	< 0.02	< 0.02	Magnesium	7	1.8	0.7
Barium	< 1	< 1	< 1	Manganese	0.06	0.05	0.05
Boron	1	1	2	Mercury	< 0.005	< 0.005	< 0.005
Bromine	1	1	1	Nitrogen	23	12	260
Calcium	185	13	8	Potassium	3	1.5	0.6
Chlorine	130	80	55	Silicon	20	< 2	< 2
Chromium	0.3	0.3	0.7	Sodium	160	33	8
Copper	1.2	0.3	0.2	Sulfur	15	< 5	< 2
Fluorine	0.1	0.2	0.3	Zinc	2.4	0.6	0.3