Reference number
ISO 2482:1973
ISO 2482:1973
© ISO 2025
International Standard
ISO 2482:1973
Sodium chloride for industrial use — Determination of calcium and magnesium contents — EDTA complexometric methods
Edition 1
1973-02
1973-02
ISO 2482:1973
7402
Published
(Edition 1, 1973)
This publication was last reviewed and confirmed in 2023.
Therefore this version remains current.
Abstract
The method is applicable to water-soluble salts for contents greater than 0,001 % (m/m). In a special case, the determination of ions in a principal solution prepared in an acid medium is pooible. The principle consists in dissolution of a test portion and separation of insoluble matter. Titration of the filtrate obtained according to ISO 2479 using disodium ethylendiamintetraacetate (EDTA) in the presence of glyoxal-bis-(2-hydroxyanil) (GBHA) and mordant black 11 (Cl 14645) respectively as indicators.