铟-7-碘-8-羟基喹啉-5-磺酸极谱络合吸附波的研究  

Studies on the Polarographic Adsorptive Complex Wave of Indium-7-iodo-8-hydroxyquinoline-5-sulfo nic Acid

作　　者：曾泳淮[1] 周涤[1] 

机构地区：[1]北京师范大学化学系,北京100875

出　　处：《分析试验室》1990年第3期8-12,共5页Chinese Journal of Analysis Laboratory

基　　金：国家自然科学基金

摘　　要：在pH2.4～2.8的3×10^(-3)mol/L HCl-5×10^(-3)mol/L KHC_8H_4O_4-1×10^(-2)mol/L CH_2ClCOOH和4×10^(-4)mol/L 7-碘-8-羟基喹啉-5-磺酸(7-1-H_2QS)溶液中,用单扫示波极谱法可得到In(Ⅲ)的络合物吸附波,峰电位-0.60V(vs、SCE)左右。导数峰高与铟的浓度在5.0×10^(-9)—8×10^(-7)mol/L的范围内呈线性关系,检出限为1.0×10^(-9)mol/L。实验表明,该极谱峰属于络合物吸附波,测定其络合比为1∶1。并用地球化学标准试样检查方法的准确性,结果满意。In a supporting electrolyte containing 3.0×10^(-3)mol /L HC1-5×10^(-3)mol/L KHC_8H_4O_4-1×10^(-2)mol/L CH_2ClCOOH at pH 2.4～2.8, an adsorptive complex wave of indium-7-iodo-8-hydroxy-quinoline-5-sul fonic acid was obtained bysingle-sweep polarography. It was found that the peak potential of the derivative wave is -0.60V (vs.SCE) and the limit of detection for indium is 1.0×10^(-9)mol/L. The composition ratio of the complex is evaluated to be 1:1 and the wave was confirmed to be an adsorptive complex wave.

关 键 词：铟 7-碘-H2QS 极谱法 矿石 

分 类 号：O614.372[理学—无机化学]