本文通过对新试剂Ｎ－邻甲苯基－Ｎ＇－（氨基对苯成酸钠）硫脲分析性能的研究，发现其在氨水介质中可和Ｃｕ￣（２＋）、Ｈｇ（２＋）发生特征性反应。通过寻找适宜的反应条件，确立了Ｃｕ￣（２＋）和Ｈｇ￣（２＋）的鉴定方法。该方法用于合成样品和标准试样的分析，均获得满意的结果。因此，该试剂可作为Ｃｕ￣（２＋）的新鉴定试剂（检出限量为０．０１５μｇ），最低浓度为０．５μｇ／ｍｌ）和Ｈｇ￣（２＋）的新鉴定试剂检出限量为０．０７５μｇ，最低浓度为２．５μｇ／ｍｌ）。 In this paper, the performance of the new reagent N-o-tolyl-N ’- (sodium p-aminobenzoate) thiourea was studied and found that it could be characterized by Cu 2+ and Hg 2+ in aqueous ammonia reaction. By finding suitable reaction conditions, the identification methods of Cu 2+ and Hg 2+ were established. The method was applied to the analysis of synthetic samples and standard samples, and satisfactory results were obtained. Therefore, this reagent can be used as a new reagent for detection of Cu 2+ (limit of detection is 0.015 μg), with the lowest concentration of 0.5 μg / ml) and the newly identified reagent of Hg 2+ is limited to zero. 075μg, the lowest concentration of 2.5μg / ml).