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１引言三氮烯类试剂是一类广泛用于测定镉、汞、锌等元素的显色剂。为了改善此类试剂的性能，我们合成了新显色剂１－（６－乙氧基－２－苯并噻唑）－３－（４－硝基苯）－三氮烯（ＥｔＯＢＴＮＰＴ），由于在其结构中功能团－Ｎ＝Ｎ－ＮＨ－两端母体上分别带有吸电子能力较强
1 Introduction Triazene reagent is a kind of widely used in the determination of cadmium, mercury, zinc and other elements of the developer. In order to improve the performance of these reagents, we synthesized a new reagent, EtOBTNPT, The structure of functional groups - N = N-NH- both ends of the parent with strong electron-withdrawing ability