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。

英文摘要：

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 optimized. 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^-7mol/L-3.2×10^-6mol/L and 2.7×10^-5mol/L-5.6×10^-4mol/L, respectively. The detection limit was 9.7×10^-8mol/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.