试剂6-硝基-2-苯并噻唑重氮氨基偶氮苯的合成并用其测定人发中的微量锌  

Synthesis of nitrobenzothiazolyldiazoaminoazobenzene and its colour reaction with zinc

作　　者：王智敏[1] 张春牛[1] 郑云法[1] 

机构地区：[1]丽水师范专科学校化学系,浙江丽水323000

出　　处：《化学试剂》2004年第3期165-167,共3页Chemical Reagents

摘　　要：在TritonX 1 0 0表面活性剂存在下 ,研究了 6 硝基 2 苯并噻唑重氮氨基偶氮苯 (NBTDAA)与锌的显色反应。在pH1 0 5～ 1 2 0的Na2 B4O7 NaOH缓冲溶液中 ,锌与该试剂生成 1∶4型深红色配合物。配合物的最大吸收峰位于λ =5 2 5nm处 ,表观摩尔吸光系数 1 5 1× 1 0 5L·mol-1 ·cm-1 。Zn2 + 的浓度在 0～ 1 0 μg/ 2 5mL范围内符合比尔定律。用拟定方法测定人发中的微量锌 。The color reaction of nitrobenzothiazolyldiazo aminoazobenzene with zinc was investigated.In the presence of the surface active agent Triton X 100 and in a Na 2B 4O 7 NaOH medium of pH 10.5～12.0,NBTDAA formed a red complex with Zn(Ⅱ).The molar absorptivity of the complex was 1.51×10 5L·mol -1 ·cm -1 at the determination wavelength of 525 nm with a molar ratio of Zn(Ⅱ)to NBTDAA of 1∶4.Beer′s law was well obeyed in the range of 0～10μg/25mL for zinc.This method has been applied to determine trace amounts of zinc in human hair with satisfactory results.

关 键 词：6-硝基-2-苯并噻唑重氮氨基偶氮苯 锌 显色反应 

分 类 号：O614.241[理学—无机化学] O625.65[理学—化学]