6-溴-2-苯并噻唑重氮氨基偶氮苯与铜的显色反应及其应用  

The color reaction of 6-bromo-2-benzothiazolyl diazoaminoazobenzene with copper Ⅱ and its application

作　　者：陈才元[1] 徐鹏[1] 白爱民[1] 龚楚儒[1] 

机构地区：[1]湖北师范学院化学与环境工程系,湖北黄石435002

出　　处：《冶金分析》2006年第2期47-49,共3页Metallurgical Analysis

摘　　要：研究了铜与6-溴-2-苯并噻唑重氮氨基偶氮苯（BBTDAA）的显色反应。结果表明，在表面活性剂Triton X-100存在下，pH10．2的Na2B4O7-NaOH缓冲介质中。铜（Ⅱ）与BBTDAA形成1：4红色络合物。络合物最大吸收波长为532nm，表观摩尔吸光系数为1．68×10^5L·mol^-1·cm^-1，25mL溶液中铜（Ⅱ）量在0～10μg范围内遵循比尔定律。拟定的方法已用于铝合金中铜的测定，结果与认定值基本一致。The color reaction of 6-bromo-2-benzothiazolyl diazoaminoazobenzene（BBTDAA） with Cu（Ⅱ） was studied. In the presence of TritonX-100, the reagent with Cu（Ⅱ） reacts to form a stable red complex with molar ratio of 1 ： 4 in pH 10.2 of Na2B407 - NaOH buffer solution. The maximum absorption of the complex is located at 532 nm and the apparent molar absorptivity is 1.68 × 10^5 L· mol^-1·cm^-1. Beer＇s law is obeyed in the range of 0 - 10 μg/25 mL for copper（n）. The copper content in aluminium alloy has been determined by this method. The results compare favourably with the certified values.

关 键 词：6-溴-2-苯并噻唑重氮氨基偶氮苯 铜 分光光度法 

分 类 号：O657.3[理学—分析化学]