ISO 5790-1979 工业用无机化学品 测定氯化物含量的一般方法 汞量法

标准号：ISO 5790-1979
中文标准名称：工业用无机化学品 测定氯化物含量的一般方法 汞量法
英文标准名称：Inorganic chemical products for industrial use; general method for determination of chloride content; Mercurimetric method
标准类型：G10
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：G10
国际标准分类号：71.080.01
适用范围：Covers a method enabling quantities of chloride eceeding 1 mg in the test portion to be determined with an absolute error of 0,2 to 0,5 mg, according to the concentration of the standard volumetric solution used. The principle of determination is based on the conversion of chloride ions into weakly ionized mercury(II) chloride, using highly ionized standard volumetric mercury(II) nitrate solution, and detection of the end-point by reaction of the excess of mercury(II) nitrate with 1,5-diphenyl-carbazone used as an indicator, by the apparance of a violet colour.