【摘要】 报道了 1 ( 4 硝基苯基 ) 3 ( 5 氯吡啶 )三氮烯 (NPCPDT)的合成及其与锌的显色反应研究。在TX 1 0 0的存在下 ,pH 1 1 0的Na2 B4 O7 NaOH缓冲溶液中 ,该试剂能与锌发生显色反应 ,锌与NPCPDT形成摩尔比为 1∶2型的黄色配合物 ,在 440nm处有一最大正吸收 ,在 5 3 5nm处有一最大负吸收。以 440nm为参比波长 ,5 3 5nm为测量波长进行双波长测定 ,表观摩尔吸光系数为2 42× 1 0 5L·mol- 1·cm- 1,锌的质量浓度在 0～ 0 48μg/mL范围内符合比尔定律。用拟定方法测定人发中的微量锌 ,结果满意更多还原

【Abstract】 The synthesis of the new regent 1-(4-nitrophenyl)-3-(5-chloropyridyl)-triazene(NPCPDT)and the color reaction of NPCPDT with zinc was reported.In the presence of the surface active agent TX-100 and in the Na 2B 4O 7-NaOH medium of pH 11.0,the reagent form ayellow complex with zinc in the molar ratio of 1∶2.The molar absorptivity is 2.42×10 5 L·mol -1·cm -1 by dual-wavelengh of 440 nm and determination wavelengh of 535 nm.Beer’s law is obeyed in the range of 0～0.48 mL.The method has been applied to the direct determ ination of zinc in human hair with satisfactory results.更多还原