铟-5-Br-PADAP极谱络合吸附波研究  

Studies on the Polarographic Adsorptive Complex Wave of Indium-2-(5-Br-2-Pyridylazo)-5-Diethylaminophenol (5-Br-PADAP)

作　　者：李益恒[1] 孟小卫[1] 

机构地区：[1]湘潭大学化学系,湘潭411105

出　　处：《分析试验室》1993年第4期29-31,共3页Chinese Journal of Analysis Laboratory

摘　　要：在0.1mol/L NH_4Ac缓冲溶液(pH6.8)中,铟(Ⅲ)-5-Br-PADAP络合物在单扫示波极谱仪上产生一灵敏的导数极谱波,峰电位在-0.65V(vs.SCE),峰电流与铟浓度在6.0×10^(-9)～6.0×10^(-6)mol/L范围内呈线性关系。研究了波的性质和反应机理,方法已应用于氧化锌矿中铟的测定。In a supporting electrolyte containing 0.10mol/L NH_4Ac and 6.0×10^(-6)mol/L 5-Br-PADAP,at pH6.8,a sensitive adsorptive wave of indium-5-Br-PADAP complex was obtained by single sweep polarography. The peak potential is—0.65V (vs. SCE). The linear relationship holds between the peak current and the indium concentration in the range from 6.0×10^(-9) to 6.0×10^(-6)mol/L. The reaction mechanism has been investigated. It was shown that the peak current was caused by the reduction of In(Ⅲ) bonded in the complex which was adsorbed on the dropping mercury electrode. The method has been applied to the determination of indium in zinc oxide ores with satisfactory results.

关 键 词：铟 PADAP 极谱 络合吸附波 溴 

分 类 号：O614.372[理学—无机化学]