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本文提出在ＨＡｃ—ＮａＡｃ介质中Ｃｕ３＋与Ｉ－、ＳＣＮ－反应生成Ｉ２，然后加入过量的Ｎａ２Ｓ２Ｏ３还 原Ｉ２，最后用电生Ｉ２回滴定过量的Ｎａ２Ｓ２Ｏ２。实验表明，用这种方法测定铜可行的，检测量可达 １０－７数量级．
In this paper, it is proposed that Cu3 + react with I- and SCN- in HAc-NaAc medium to form I2, and then excess Na2S2O3 is added to reduce I2, and the excess Na2S2O2 is titrated back by I2. Experiments show that using this method to determine the copper feasible, the detection of up to 10-7 orders of magnitude.