The condition and method to determine thiocyanate ion by automatic potentiometric titration was studied. The results show that, the selection of silver electrode as indicator electrode, the electrode 217 with double liquid junction as reference, this method has high selectivity in nitric acid medium to titrate thiocyanate ion. When used in electroplating wastewater analysis, the method is simple and fast, which can print out the results in 4 minutes.%研究了用自动电位滴定测定硫氰酸根离子的条件和方法.实验结果表明,选用银电极为指示电极,217型双液接电极为参比电极,在硝酸介质中滴定硫氰酸根离子,方法具有高选择性；应用于电镀废水分析,方法简便快捷,在4min内能打印出分析结果.
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