高灵敏度显色剂HCSDAB与铜显色反应的研究及应用  

STUDY OF THE COLOUR REACTION OF 2-HYDROXY-3-CARBOXY-5-SULFOBENZENE-DIAZOAMINOAZOBENZENE (HCSDAB) WITH COPPER(Ⅱ) AND ITS APPLICATION

作　　者：王丽华 胡浩 

机构地区：[1]海安县中丽化工有限公司,南通226600

出　　处：《理化检验（化学分册）》2003年第4期205-206,共2页Physical Testing and Chemical Analysis(Part B:Chemical Analysis)

摘　　要：研究了 2 羟基 3 羧基 5 磺酸基苯重氮氨基偶氮苯 (HCSDAB)与铜显色反应的条件 ,结果表明 ,在HOAc NaOAc缓冲介质中 ,在Tween 80及 β CD存在下 ,铜与HCSDAB生成稳定的 1∶2络合物 ,其吸光峰位于 5 18nm波长处 ,摩尔吸光系数 (ε518)为 1.3× 10 5L·mol- 1·cm- 1,常见离子无干扰 ,方法应用铝合金及铁矿石中铜的光度测定 ,结果满意。In an acetate buffer of pH 5.6, and in the presence of Tween 80 and β CD, Cu(Ⅱ) ion reacts with HCSDAB to give a stable complex (Cu∶R=1∶2) having it absorption maxima at 518nm. Molar absorptivity of the complex achieved to a high value of 1.3×10 5L·mol -1 ·cm -1 . Beer′s law holds in the concentration range of 0~10μg of Cu(Ⅱ) per 25ml of solution. Common co existing ions at mg level have no interferences. Satisfactory results were obtained in its application to the photometric determination of microamounts of copper in aluminum alloys and pyrites.

关 键 词：灵敏度 显色剂 HCSDAB 铜 显色反应 2-羟基-3-羧基-5-磺酸基苯重氮氨基偶氮苯 吸光光度法 分析 

分 类 号：O614.121[理学—无机化学] O657.32[理学—化学]