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    • ISO 4321:1977
    Codes & Standards - Purchase

    ISO 4321:1977

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

    SKU: iso_010192_103752 Published by ISO Publication Year 1977 1 Edition 2 pages

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    • Overview
    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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    GST REG No R119441681
    QST REG No R1006017360

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