標準號：ISO 5790-1979
中文標準名稱：工業用無機化學品 測定氯化物含量的一般方法 汞量法
英文標準名稱：Inorganic chemical products for industrial use; general method for determination of chloride content; Mercurimetric method
標準類型：G10
發布日期：1999/12/31 12:00:00
實施日期：1999/12/31 12:00:00
中國標準分類號：G10
國際標準分類號：71.080.01
適用范圍：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.