4-(邻-重氮氨基苯胂酸)-偶氮苯测定镉的高灵敏度方法  

HIGHLY SENSITIVE MICELLA COLOUR REACTION OF CADMIUM WITH 4-(o-DIAZOAMINOPHENYLARSONIC ACID)AZOBENZENE

作　　者：金谷[1] 朱玉瑞[1] 张保忠[1] 王秀燕[1] 

机构地区：[1]中国科技大学应用化学系,近代化学系,合肥230026

出　　处：《分析化学》1989年第10期875-878,共4页Chinese Journal of Analytical Chemistry

摘　　要：本文提出了用4-(邻-重氮氨基苯胂酸)偶氮苯分光光度法测定镉的高灵敏度新方法。此试剂可与Cd(Ⅱ)形成3:1的配合物,其表观摩尔吸光系数为1.85×10~5L·mol^-1·cm^-1,在0—12.50μg Cd(Ⅱ)/25ml范围内服从比尔定律,大多数离子不干扰,可满意地用于测定工业废水中的痕量Cd(Ⅱ)。4-(o-diazoaminophenylarsonic acid) azobenzene is first employed as a chromogenic agent in the spectrophotometric determination of Cd. In the presence of nonionic surfactants, Tween-80 and alcohol, the new reagent forms a red chelate with Cd over the pH range 11.50—13.00. The apparent molar absorptivity of the complex at 520nm is 1.85×10~5 L·mol^(-1)·cm^(-1).The common metal ions do not interfere. The procedure is applied to direct determination of trace cadmium in the waste solution of electrodeposition. The percentage of recovery is 96—101%.

关 键 词：镉 偶氮苯 光度法 氮氨基苯 胂酸 

分 类 号：O614.242[理学—无机化学]