平行入射式光谱电化学池的制作及分析应用  

Fabrication of Parallel Spectroelectrochemical Cell and Application to Quantitative Analysis

作　　者：谢远武[1] 程广金[1] 董绍俊[1] 

机构地区：[1]中国科学院长春应用化学研究所电分析化学研究实验室,长春130022

出　　处：《分析化学》1991年第6期636-640,共5页Chinese Journal of Analytical Chemistry

基　　金：国家自然科学基金

摘　　要：本工作制作了用于定量分析的平行入射式光谱电化学池,电极长度为2 cm,光束高度约为120μm。稳定的吸光度在较宽的浓度范围内具有良好的线性关系,最低检测限对氢醌为3×10^(-8)mol/L,而对邻甲联苯胺为2×10^(-8)mol/L。利用光谱电化学可以在四倍的多巴胺存在下测定抗坏血酸,而大量存在的抗坏血酸对多巴胺的测定无影响。A parallel spectroelectrochemical cell for quantitative analysis was fabricated. The length of electrode is 2 cm and the height of light-beam is 120 μm. The stabilized absorbances have a good linear dependence over wide range of concentrations. The lowest detection limit is 3×10^(-8)mol/L for hydroquinone and 2×10^(-8) mol/L for o-tolidine respectively. By using spectroelectrochemistry, ascorbic acid can be determined in the presence of four times concentration of dopamine and a large amount of ascorbie acid has no influence on the determination of dopamine.

关 键 词：光谱电化学 抗坏血酸 多巴胺 测定 

分 类 号：O657.1[理学—分析化学]