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ISO 4325:1990

Current Revision

Soaps and detergents -- Determination of chelating agent content -- Titrimetric method

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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.


SDO ISO: International Organization for Standardization
Document Number ISO 4325
Publication Date Not Available
Language en - English
Page Count
Revision Level
Supercedes
Committee ISO TC 91
Publish Date Document Id Type View
Not Available ISO 4325:1990 Revision