ISO-4325 › Soaps and detergents -- Determination of chelating agent content -- Titrimetric method

ISO-4325 - 2ND EDITION - CURRENT


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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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Document Number

ISO 4325:1990

Revision Level

2ND EDITION

Status

Current

Publication Date

April 15, 1990

Committee Number

ISO TC 91