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投稿时间：2016-01-06
投稿时间：2016-01-06
中文摘要: 以尼泊金乙酯（EP）为模板分子，邻苯二胺（o-PD）为功能单体，利用循环伏安法在玻碳电极（GCE）表面制备分 子印迹膜，对分子印迹聚合条件进行了优化，并进一步在双通道丝网印刷碳电极（SPCE）表面进行电聚合，制得双通道 尼泊金乙酯分子印迹膜电极（EP-MIP/SPCE）。利用循环伏安法、方波伏安法和电流-时间曲线法对分子印迹传感器的电 化学性能进行评价。EP 在双通道 EP-MIP/SPCE 上的氧化电流与 EP 在低浓度区（3.2×10-7 mol/L~3.2×10-6 mol/L）和高浓 度区（2.7×10-5 mol/L~5.6×10-4 mol/L）分别呈良好的线性关系，检出限为 9.7×10-8 mol/L。运用建立的方法对市售酱油中的 EP 进行了测定，加标回收率为 97.2 %~106.6 %，实验结果表明，该双通道分子印迹传感器可对酱油等食品样品中的尼泊 金酯类进行快速测定。
Abstract:Ethylparaben （EP） was used as template molecule， o-phenylenediamine （o-PD） as functional monomer， the molecularly imprinted film was electropolymerized on the surface of a glassy carbon electrode by cyclic voltammetry （CV）， and the electropolymerization conditions of molecularly imprinted film were opti－ mized. Furthermore， the dual channel molecularly imprinted electrode （EP-MIP/SPCE） was fabricated based on a dual channel screen-printed electrode. The electrochemical properties of the sensor were investigated using cyclic voltammetry， square wave voltammetry and current-time curve methods. The oxidation current of EP on the dual channel sensor had good linear relationship with the concentration of EP in the ranges of 3.2×10-7 mol/L-3.2×10-6 mol/L and 2.7×10-5 mol/L-5.6×10-4 mol/L， respectively. The detection limit was 9.7×10-8 mol/L. The dual channel sensor was applied to determine EP in commercial soy sauce with recovery rates from 97.2 % to 106.6 %. The results showed that the dual channel sensor was suitable for fast determination of parabens in soy sauce and other food samples.
文章编号：201607002 中图分类号： 文献标志码：A
基金项目:国家自然科学基金项目（21005091）；广东省高等学校优秀青年教师培养资助项目（Yq2013097）
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