离子选择电极法测定金属锑中的微量氯

Determination of micro amount of chloride in antimon metal with ion selective electrode

用氯离子选择电极以多次标准添加作图法测定了金属锑中微量氯离子。大量锑对测定氯离子的干扰,可用酒石酸和柠檬酸根络合消除。该方法流程简单、检测快速,相对标准偏差小于7.0%(n=6),加料回收率为90%～104%,最低可测定0.000 5%的氯离子。

The determination of micro amount of chloride in antimon metal with a chloride-selective electrode by means of the consecutive standard addition method has been developed. The interference of antimony in a large quantity can be eliminated by tartaric acid and citric acid complexing. The procedure is simple and rapid, with a relative standard deviation of less than 7% and standard addition recoveries of 90%～104%. This method can determine chloride as low as 0. 000 5%