ISO 981:1973Published

Sodium hydroxide for industrial use — Determination of chloride content — Mercurimetric method

Hydroxyde de sodium à usage industriel — Dosage des chlorures — Méthode mercurimétrique

Abstract / scope

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.