NORMSERVIS s.r.o.

ISO 4321:1977

Washing powders — Determination of active oxygen content — Titrimetric method

NORMA vydaná dňa 1.9.1977

Anglicky -
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Anglicky -
Tlačené (54.80 EUR)


Francúzsky -
Elektronické PDF (54.80 EUR)
Francúzsky -
Tlačené (54.80 EUR)

Informácie o norme:

Označenie normy: ISO 4321:1977
Dátum vydania normy: 1.9.1977
Počet strán: 2
Približná hmotnosť: 6 g (0.01 libier)
Krajina: Medzinárodná technická norma
Kategória: Technické normy ISO

Anotácia textu normy ISO 4321:1977 :

Description / 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.