ISO 5790:1979 工业用无机化学制品.测定氯含量的一般方法.汞液滴定法

标准编号：ISO 5790:1979

中文名称：工业用无机化学制品.测定氯含量的一般方法.汞液滴定法

英文名称：Inorganic chemical products for industrial use — General method for determination of chloride content — Mercurimetric method

发布日期：1979-07

标准范围

介绍了一种方法，根据所用标准体积溶液的浓度，在绝对误差为0.2至0.5 mg的情况下，测定供试品中1 mg氯化物的含量。测定原理基于使用高度电离的标准体积硝酸汞（II）溶液将氯离子转化为弱电离的氯化汞（II），并通过过量的硝酸汞（II）与用作指示剂的1,5-二苯基氨基甲酸酯反应，通过呈现紫色来检测终点。

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.

标准预览图