Reference number
ISO 981:1973
ISO 981:1973
© ISO 2024
International Standard
ISO 981:1973
Sodium hydroxide for industrial use — Determination of chloride content — Mercurimetric method
Edition 1
1973-02
1973-02
ISO 981:1973
5419
Publicado
(Edición 1, 1973)
Esta publicación se revisó y confirmó por última vez en 2023.
Por lo tanto, esta versión es la actual.
Resumen
The method is applicable to products of which the chloride content is greater than 0.005 % (m/m). The procedure based on titration of the chloride ions with mercury(II) nitrate in the presence of diphenylcarbazone as indicator. - Replaces ISO Recommendation R 981-1969.