标准摘要
[中文适用范围]： 将样品的测试部分溶解在水中，将溶液的pH调节至4.65，并使用1-(2-吡啶基偶氮)-2-萘酚作为指示剂对标准硫酸铜(II)溶液进行滴定。 该方法主要是为测定乙二胺四乙酸 (EDTA) 及其盐而设计的。 在测定其他螯合剂或在其他螯合剂存在下测定乙二胺四乙酸之前，应确认该方法的适用性。 [外文原描述]： 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.
英文名称Soaps and detergents — Determination of chelating agent content — Titrimetric method