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本文首次报道了用涂丝Ａｇ—Ａｇ２Ｓ电极测定水体中微量氰化物的方法研究，对电极的电化学性能作了详细地探讨，得出与文献不同的结论；通过扫描电镜揭示了电极在使用过程中“老化”和“中毒”的原因；同时对一直延用至今的Ａｇ（ＣＮ）指示剂的配制方法和使用浓度作了完全改变，加上成功地在离子强度调节剂中添加有机溶剂等，较大程度地提高了方法的灵敏度，从而使得方法的线性范围为１０－７～１０－３ｍｏｌ·ｌ－１ＣＮ－浓度，检测下限可达１ＰＰｂ。
This paper reports for the first time the method of measuring trace cyanide in water with Ag-Ag2S coated wire, and studies the electrochemical performance of the electrode in detail. The conclusion is different from the literature. The scanning electron microscope “Aging” and “poisoning”; at the same time, the preparation method and concentration of Ag (CN) indicator, which has been used till now, are completely changed. In addition, the organic solvent and the like are successfully added into the ionic strength regulator, The sensitivity of the method is greatly improved, so that the linear range of the method is 10-7-10-3 mol·L -1 CN-concentration, and the detection limit can be up to 1 PPb.