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Position: Home > Articles > Electrochemical Behavior and Determination of Bisphenol A at Carbon Paste Electrode Modified with Ionic Liquid FOOD SCIENCE 2015,36 (22) 152-155

双酚A在离子液体修饰碳糊电极上的电化学行为及测定

作  者：
花小霞;郑香丽;刘珊;夏方诠;周长利
单  位：
济南大学化学化工学院
关键词：
离子液体;化学修饰电极;双酚A;食品检测
摘  要：
制备1-氰乙基-3-甲基咪唑六氟磷酸盐离子液体修饰碳糊电极,研究双酚A(bisphenol A,BPA)在离子液体修饰碳糊电极上的电化学行为。结果表明,在0.1?mol/L?B-R缓冲液(p H 10.0)中,BPA在0.415 V处产生一良好的氧化峰,具有明显的电催化增敏作用。BPA的氧化过程为伴随有质子转移的表面吸附控制的不可逆过程,其电极反应速率为0.32/s。建立了示差脉冲伏安法测定痕量BPA的方法,线性范围为3.0×10-7~6.0×10-5 mol/L,检出限为5.0×10-8 mol/L(RSN=3)。并将其用于奶瓶样品中迁移BPA的测定,结果表明该传感方法为直接电化学检测BPA提供了一种新的思路。
译  名：
Electrochemical Behavior and Determination of Bisphenol A at Carbon Paste Electrode Modified with Ionic Liquid
作  者：
HUA Xiaoxia;ZHENG Xiangli;LIU Shan;XIA Fangquan;ZHOU Changli;College of Chemistry and Chemical Engineering,University of Jinan;
关键词：
ionic liquid;;chemically modified electrode;;bisphenol A;;food detection
摘  要：
In this work,a 1-cyanoethyl-3-methylimidazolium hexafluorophosphate(CMIMPF_6) modified ionic liquid carbon paste electrode(ILCPE) was fabricated.The electrochemical behavior of bisphenol A(BPA) at the ILCPE electrode was studied in detail.In 0.1 mol/L B-R buffer solution(pH 10.0),a well-defined anodic peak was produced at 0.415 V.The ILCPE electrode showed good catalytic activity and sensitizing effect on the oxidation of BPA in the B-R solution.The investigation of the electrode process indicated that the electrochemical oxidation of BPA was an irreversible process with a controlled adsorption,and that protons participated in the electrode reaction process.The corresponding electrochemical rate constant(k_s) was 0.32/s.The limit of detection and the linear range of BPA concentration against oxidation peek current were 5.0×10~(-8) mol/L(R_(SN)=3) and 3.0×10~(-7)-6.0×10~(-5) mol/L,respectively.Differential pulse voltammetry has been applied to the determination of microamounts of BPA in feeding bottle samples with satisfactory results.

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