金的电化学价态分析和定量测定研究  

Valence analysis and quantitative determination of gold by electrochemical method

作　　者：屈凌波[1] 郁有祝[2] 郭玉华[2] 

机构地区：[1]河南工业大学化学化工学院 [2]河南安阳工学院化学与环境工程系

出　　处：《黄金》2009年第5期43-45,共3页Gold

摘　　要：在一定条件下，用方波极谱法研究了Au（Ⅲ）和Au（Ⅰ）与4-（2-吡啶偶氮）-间苯二酚（PAR）络合时，Au（HI）和PAR络合物在-0．35V和-0．42V处有两个明晰的还原峰，其中第二个还原峰的电流（IP）与Au（Ⅲ）的质量浓度在0．50～4．0μg/mL范围内呈线性关系，检出限为0．010μg／mL；Au（Ⅰ）与PAR络合物在-0．38V处有-个明晰的还原峰，峰电流（IP）与Au（Ⅰ）的质量浓度在0．050—2．0μg／mL范围内呈线性关系，检出限为0．0030μg／mL。用该方法成功地分析了金矿粉处理后滤液中金的价态和含量。The complex of Au（ Ⅲ ） and Au（ Ⅰ ） with 4-（2-pyridylazo） resorcinol （PAR） were studied by square wave polarography respectively in this paper. There were two reduction peaks at - 0.35V and - 0.42V for the com- plex Au（ Ⅲ ） with PAR, and the electric current （IP） of the second reduction peak linearly increased with the increase of the concentration of Au（ Ⅲ） at the range of 0.50 -4.01μg/mL and the detection limit was 0.010μg/mL. Only a reduction peak was shown at -0.38V for the complex Au（ Ⅰ ） with PAR, the electric current（Ip） linearly in- creased with the increase of the concentration of Au（ Ⅰ） at the range of 0. 050 -2.0μg/mL and the detection limit was 0.003 0μg/mL. The valence and content of gold, in the filtrate after gold concentrate process, were successfully determined by this method.

关 键 词：方波极谱法 4-(2-吡啶偶氮)-间苯二酚 Au(Ⅲ) Au(Ⅰ) 

分 类 号：O614.123[理学—无机化学]