1-(4-硝基苯基)-3-(5,6-二甲基-1,2,4三氮唑)-三氮烯的合成及与汞的显色反应

Synthesis of 1-(4-nitrophenyl)-3-(5,6-dimethyl-1,2,4-triazol)-triazene and its color reaction with mercury

报道了1-（4-硝基苯基）-3-（5，6-二甲基-1，2，4三氮唑）-三氮烯（NPDMTT）的合成、结构表征及其与汞的显色反应。在Trition X-100表面活性剂和pH 11.0的Na2B4O7-NaOH缓冲溶液中，该试剂与汞形成3∶1的浅黄色络合物，络合物的最大负吸收峰位于530nm处，表观摩尔吸光系数为1.34×10^5L·mol^-1·cm^-1。Hg^2＋的浓度在0-360μg/L范围内符合比尔定律，相关系数r=0.999 8。用拟定方法测定工业废水中的汞，RSD≤1.2%，加标回收率为98.8%-101.5%。

The synthesis of a new reagent 1- （4-nitrophenyl） -3-（5,6-dimethyl-1,2,4-triazol ）- triazene （NPDMTT） ,structural characterization and its color reaction with mercury are reported. In the presence of the surface active agent Trition X-100 and in the Na2B4O7-NaOH medium of pH 11.0, the reagent with mercury forms a yellow complex with a NPKMTT：Hg molar ratio of 3.1. The negative absorption maximum of the complex lies at 530nm. The apparent molar absorptivity is 1.34×10^5L·mol^-1·cm^-1. Beer＇s law is obeyed in the range 0-360μg of mercury. The correlation coefficient is 0. 999 8. This method has been applied to determine mercury in industrial waste water with RSD≤ 1.2% and recovery of 98.8%-101.5%.