ISO 742:1973
Sodium carbonate for industrial use; Determination of chloride content; Mercurimetric method

Standard No.

ISO 742:1973

Release Date

1973

Published By

International Organization for Standardization (ISO)

Status

Withdraw 2002-05

Latest

ISO 742:1973

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.

ISO 742:1973 history

• 1973 ISO 742:1973 Sodium carbonate for industrial use; Determination of chloride content; Mercurimetric method