铟(Ⅲ)-二溴邻苯二胺双草酰胺酸酯配合物电化学行为研究及应用  

STUDY ON THE ELECTROCHEMICAL BEHAVIOR OF THE COMPLEX BETWEEN INDIUM(Ⅲ) AND DIBROMO-o-PHENYLDIAMINE DIACETAMIDE ESTER (DBPMACE) AND ITS ANALYTICAL APPLICATION

作　　者：罗川南[1] 周长利[2] 寿崇琦[1] 于海芹[2] 贺龙强[2] 张霞[2] 

机构地区：[1]中国科学院兰州化物所 [2]济南大学应化系

出　　处：《理化检验（化学分册）》2004年第1期6-8,11,共4页Physical Testing and Chemical Analysis(Part B:Chemical Analysis)

摘　　要：在0.05mol·L-1氯乙酸 氯乙酸钠(pH3.0)介质中,In(Ⅲ)与二溴邻苯二胺双草酰胺酸酯(DBPMACE)生成配合物,并吸附于电极表面,于-0.63V(vs.SCE)得到配合物吸附还原波。其二次微分极谱峰电流与In(Ⅲ)浓度在7.5×10-8～3.4×10-6mol·L-1内呈良好的线性关系,检出限为1.5×10-8mol·L-1。应用于陶瓷颜料、矿石中微量铟的测定,结果满意。并对电化学反应机理进行了初步探讨。In a chloroacetic acid and sodium chloroacetate buffer medium of pH 3.0 a complex is formed between In(Ⅲ) and DBPMACE and is adsorbed on the surface of mercury electrode producing a reduction peak at (-0.63V) (vs. SCE). Linearity between the peak current (I″_p) of the single-sweeping 2nd derivative oscillopolarogram and the concentration of In(Ⅲ) was held in the range 7.5×10^(-8)～3.4×10^(-6)mol·L^(-1) of In(Ⅲ), and the detection limit was found to be 1.5×10^(-8)mol·L^(-1). The mechanism of the electrode process was also studied. This method has been satisfactorily applied to the determination of trace amounts of indium in dyestuff and ore samples.

关 键 词：铟(Ⅲ) 二溴邻苯二胺双草酰胺酸酯 配合物 电化学行为 反应机理 痕量分析 

分 类 号：O614.372[理学—无机化学] O657.1[理学—化学]