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.
出处
《分析试验室》
CAS
CSCD
北大核心
1993年第4期29-31,共3页
Chinese Journal of Analysis Laboratory
关键词
铟
PADAP
极谱
络合吸附波
溴
Indium determination
5-Br-PADAP
adsorptive complex wave
