电化学发光法测定碘的研究  

A Study of Determination of Iodine by Electrochemistry

作　　者：刘华俊[1] 曾昊[1] 李淑琴[1] 王高芳[1] 

机构地区：[1]襄樊学院化学化工系,湖北襄樊441053

出　　处：《襄樊学院学报》2002年第5期42-44,共3页Journal of Xiangfan University

基　　金：湖北省高校科研青年发展项目(98B037)

摘　　要：在流通体系中,于电解池的三电极系统的工作电极铂片上施加0.35v(相对于AgCl/Ag电极)的电势,使KCl-Na2CO3-NaHCO3-I-Luminol电解液中I-氧化成单质I2. 生成的I2与Luminol反应,产生化学发光. 电化学发光强度与I-浓度成正比,据此测定I-浓度,本法选择性较好,检出限为4.1×10-10g/mL,线性范围为1.2×10-7～1.0×10-9g/ml,对1.0×10-7g/ml的I-七次平行测定的相对偏差为2.8%,成功地用于食盐中碘的测定.The electrochemiluminescence(ECL) of I- in NaHCO3-Na2CO3-KCl-luminol solution was studied. Under the chosen measuring conditions, the ECL intensity was proportional to the concentration of I- over the range of 1.2×10-7―1.0×10-9g/ml,the detection of I- is 4.1×10-10g/ml,the relative standard deviation is 2.8% for 1.0×10-7g/ml(n=7). The method has been applied successfully to the determination of Iodine in table salt.

关 键 词：电化学发光分析 碘 鲁米诺 

分 类 号：O657.13[理学—分析化学]