Reference number
ISO 2762:1973
ISO 2762:1973
© ISO 2025
International Standard
ISO 2762:1973
Hydrochloric acid for industrial use — Determination of soluble sulphates — Turbidimetric method
Edition 1
1973-11
1973-11
ISO 2762:1973
7742
Published
(Edition 1, 1973)
This publication was last reviewed and confirmed in 2023.
Therefore this version remains current.
Abstract
The turbidimetric method is applicable to products containing less than 0.1 % (m/m) of soluble sulphates. The principle consists in evaporation of a test portion to dryness and solution of the residue in hydrochloric acid. Measurement of the turbidity obtained by precipitation, under well defined conditions, of barium sulphate. Has also been approved by the IUPAC.