ISO/TC 47 Chemie,
ISO/TC 47 Chemistry,
ISO/TC 47 Chimie,
ISO Internationale Organisation für Normung,
ISO International Organization for Standardization,
ISO Organisation Internationale de Normalisation
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Media type:
Standard
Title:
ISO 981
:
Sodium hydroxide for industrial use; Determination of chloride content; Mercurimetric method
Other titles:
Früher unter dem Titel: ISO/R 981 (1969-02)
Natriumhydroxid (Natronlauge, Ätznatron) für Industriezwecke; Bestimmung des Chloridgehaltes; mercurimetrische Methode (Titrierung des Cl-Ions mit Quecksilbernitrat)
Hydroxyde de sodium à usage industriel; Dosage des chlorures; Méthode mercurimétrique
Description:
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.