ISO 4325-1990 肥皂和洗涤剂 螯合剂含量的测定 滴定法

标准号：ISO 4325-1990
中文标准名称：肥皂和洗涤剂 螯合剂含量的测定 滴定法
英文标准名称：Soaps and detergents; determination of chelating agent content; titrimetric method
标准类型：Y43
发布日期：1999/12/31 12:00:00
实施日期：1990/4/15 12:00:00
中国标准分类号：Y43
国际标准分类号：71.100.40
适用范围：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.