ISO 4321:1977

Status : Published (Under review)

This standard was last reviewed and confirmed in 2022. Therefore this version remains current.

	Format	Language
std 1 40	PDF
std 2 40	Paper

CHF40

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Abstract

The determination consists in co-reduction, with liberation of oxygen, of the peroxyhydrate and potassium permanganate in an acid solution. Because of the specifity 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 avoited by adoption of a particular method of dissolution appropriate to the determination of active oxygen content. This method may be used for determing peroxyhydrates, for example sodium perborate.

General information

Status
: Published

Publication date
: 1977-09

Stage
: International Standard confirmed [90.93]
Edition
: 1

Number of pages
: 2
Technical Committee :
ISO/TC 91

ICS :
71.100.40
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