ISO 684-1974 肥皂的分析 总游离碱的测定

标准号：ISO 684-1974
中文标准名称：肥皂的分析 总游离碱的测定
英文标准名称：Analysis of soaps; Determination of total free alkali
标准类型：Y40;Y43
发布日期：1999/12/31 12:00:00
实施日期：1999/12/31 12:00:00
中国标准分类号：Y40;Y43
国际标准分类号：71.100.40
适用范围：The soap is dissolved in an ethanolic solution, the free alkali is neutralized with a known excess of sulphuric acid solution and the excess acid is titrated with ethanolic potassium hydroxide solution. The method is not applicable if the soap cantains additives (alkali, silicates, etw.) which can be decomposed by sulphuric acid by the procedure specified. The method is also not applicable to coloured soaps if the colour interferes with the phenolphthalein end point.