ISO 742:1973Withdrawn

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

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

Abstract / scope

The method is applicable to products of which the sodium chloride content is greater than 0,005 % (m/m). The prinziple consists in titration of the chloride ion with mercury(II) nitrate solution in the presence of diphenylcarbazone as indicator. Cancels and replaces ISO Recommendation R 742-1968.