铕(Ⅲ)在邻菲啰啉/Nafion薄膜修饰电极上的伏安行为  

Electrochemical Study of Europium (Ⅲ) at o-Phenanthroline/Nafion Polymer Film Electrode

作　　者：侯建敏[1] 俞希杰 李南强[1] 

机构地区：[1]北京大学化学系,北京100871

出　　处：《分析化学》1992年第12期1429-1432,共4页Chinese Journal of Analytical Chemistry

基　　金：中国科学院长春应用化学研究所电分析化学开放实验室资助课题

摘　　要：本文研究了铕(Ⅲ)在邻菲啰啉/Nafion聚合物薄膜修饰电极上的伏安行为。在pH5.1的六次甲基四胺底液中,实验了多种因素对铕(Ⅲ)的还原电流的影响。在选定分析条件下,铕(Ⅲ)的还原峰高在1.0×10^(-7)～1.0×10^(-5)mol/L范围内有良好的线性关系。富集时间15min时,检出限可达3.0×10^(-8)mol/L。用于发光材料中铕(Ⅲ)的测定,取得满意结果。Electrochemical behaviours of Eu(Ⅱ) at o-phenanthroline (phen)/Nafion polymer film electrodes have been studied by cyclic voltammetry. The phen/Nafion film electrode which is prepared by incorporating o-phenanthroline in Nafion coatings on carbon glass electrode can be used for the determination of Eu(Ⅱ). In the solution of 0.1 mol/L (CH_2)_6N_4(pH (5.1), a sensitive reductive peak at -0.7V (vs.SCE) is obtained. The peak height of derivative wave is proportional to C_(E_u) in the range of 1.0×10^(-7)～1.0×10^(-5) mol/L. When the accumulated time at -0.6 V is 15 min, the detection limit is down to 3.0×10^(-8) mol/L. The proposed method is applied to the determination of the content of Eu(Ⅱ) in luminescent material with good results.

关 键 词：铕 邻菲罗啉 薄膜电极 NAFION 

分 类 号：O614.338[理学—无机化学]