International Standard
ISO 4321:1977
Washing powders — Determination of active oxygen content — Titrimetric method
Reference number
ISO 4321:1977
ISO 4321:1977
Edición 1
1977-09
1977-09
© ISO 2024
International Standard
p
ISO 4321:1977
10192
No disponible en español
Publicado
(Edición 1, 1977)
Esta norma se revisó y confirmó por última vez en 2022.
Por lo tanto, esta versión es la actual.
Resumen
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.
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