铂-丁二酮肟络合吸附波测定微量铂  

Polarographic determination of trace platinum using platinum-dimethyglyoxime complex adsorption wave

作　　者：陈强[1] 康敬万[1] 高锦章[1] 

机构地区：[1]兰州大学环境质量评价研究中心

出　　处：《分析试验室》2006年第2期97-99,共3页Chinese Journal of Analysis Laboratory

基　　金：甘肃省自然科学基金(GZ-005);甘肃省教委基金资助

摘　　要：铂和丁二酮肟在pH 4.1的HAc^NaAc支持电解质中,形成具有电活性络合物。在单扫示波极谱-0.88 V(vs.SCE)左右出现良好还原波。此波峰高与铂的浓度在1.0×10-8~4.0×10-6mol/L范围内呈线性关系。检出限为2.6×10-9mol/L。并成功的用于贵金属合成样及合金样品中铂量的测定。In the solution of HAc-NaAc （pH 4.10）, the polarographic adsorption wave of Pt（Ⅳ）-dimethylglyoxime （DMG） complex has been investigated in detail. The peak potential is at -0.88 V （vs. SCE） on oscillopolarograph. The concentration of platinum is proportional to the peak height of the second order derivative wave in the range of 1. 0 × 10^-8 -4.0 × 10^-6 mol/L. The detection limit is down to 2.6 × 10^-9 mol/L. The method has been successfully applied to the mensuration of platinum in alloy samples. The results are in agreement with atomic adsorption spectrometric method and RSD is ≤0.16% （ n = 3）. A sensitive and direct polarographic method for the determination of trace amount of Pt（ Ⅳ ） has been developed.

关 键 词：络合吸附波 丁二酮肟 铂的测定 

分 类 号：O657.12[理学—分析化学]