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ISO 4321:1977

Washing powders -- Determination of active oxygen content -- Titrimetric method
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ISO 4321:1977

Washing powders -- Determination of active oxygen content -- Titrimetric method

PUBLISH DATE 1977
ISO 4321:1977

The determination consists in co-reduction, with liberation of oxygen, of the peroxyhydrate and potassium permanganate in an acid solution.

Because of the *specificity* of washing powders and the relative stability of peroxyhydrates, the dissolution of washing powders is likely to be incomplete and may result in a loss of oxygen; these disadvantages have been avoided by adoption of a particular method of dissolution appropriate to the determination of active oxygen content.

This method may be used for determining peroxyhydrates, for example *sodium perborate*.

SDO ISO: International Organization for Standardization
Document Number ISO 4321
Publication Date Sept. 1, 1977
Language en - English
Page Count
Revision Level
Supercedes
Committee ISO TC 91
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