ISO 4325:1990
International Standard
Current Edition
·
Approved on
19 April 1990
Soaps and detergents — Determination of chelating agent content — Titrimetric method
ISO 4325:1990 Files
English
2 Pages
Current Edition
OMR
21.2
ISO 4325:1990 Scope
A test portion of the sample is dissolved in water, the pH of the solution adjusted to 4.65 and the solution titrated against standard copper(II) sulphate solution using 1-(2-pyridylazo)-2-naphthol as indicator. Principally the method has been designed principally for determining ethylenediaminetetraacetic acid (EDTA) and it salts. Before determining other chelating agents, or determining ethylenediaminetetraacetic acid in the presence of other chelating agents, the applicability of the method should be confirmed.
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