Sodium dodecyl sulfate sensitized electrochemical method for subnanomole level determination of ortho-phenylphenol at a novel disposable electrode  

作　　者：LI HongBo LI Jing MENG DongMei PENG JinYun QIAO QiuJu YANG ZhanJun XU Qin HU XiaoYa 

机构地区：[1]College of Chemistry and Engineering, Fangzhou University, Yangzhou 225002, China [2]Chemistry and Biology Engineering School, Yancheng Institute of Technology, Yancheng 224051, China

出　　处：《Science China Chemistry》2011年第7期1116-1122,共7页中国科学（化学英文版）

基　　金：support from the National Natural Science Foundation of China (20705030, 20875081, 21075107 & 21005070);the National High Technology Research and Development Program of China (2009AA03Z331);the Natural Science Foundation of Yancheng Institute of Technology (XKY-2009009)

摘　　要：The electrochemical behavior of ortho-phenylphenol （OPP） at a disposable electrode （an improved wax-impregnated graphite electrode） in the presence of sodium dodecyl sulfate （SDS） was studied for the first time. The results demonstrated that the electrocatalytic oxidation process of OPP was accompanied with two-charge-two-proton transference. The electronic transmission coefficient （a） and diffusion coefficient （DR） for OPP were calculated to be 0.8126 and 3.61× 10^-2 cm2/s, respectively. The electrochemical signal was apparently improved by SDS at the disposable electrode and the oxidative peaks current was proportional to the concentration of OPP over the range from 1.0 ×10^-9 to 4.0 × 10^-6 mol/L with the detection limit of 8.7× 10^-10 mol/L. This novel and highly sensitive method can be successfully applied to detect OPP in the orange rind sample.The electrochemical behavior of ortho-phenylphenol(OPP) at a disposable electrode(an improved wax-impregnated graphite electrode) in the presence of sodium dodecyl sulfate(SDS) was studied for the first time.The results demonstrated that the electrocatalytic oxidation process of OPP was accompanied with two-charge-two-proton transference.The electronic transmission coefficient(α) and diffusion coefficient(DR) for OPP were calculated to be 0.8126 and 3.61 × 10-2 cm2/s,respectively.The electrochemical signal was apparently improved by SDS at the disposable electrode and the oxidative peaks current was proportional to the concentration of OPP over the range from 1.0 × 10-9 to 4.0 × 10-6 mol/L with the detection limit of 8.7 × 10-10 mol/L.This novel and highly sensitive method can be successfully applied to detect OPP in the orange rind sample.

关 键 词：sodium dodecyl sulfate ELECTROCHEMICAL DETERMINATION ortho-phenylphenol disposable electrode 

分 类 号：O647.2[理学—物理化学] TQ243.12[理学—化学]