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首页> 外文期刊>International Journal of Electrochemical Science >Sensitive Voltammetric Determination of Vanillin with an Electrolytic Manganese Dioxide-Graphene Composite Modified Electrode
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Sensitive Voltammetric Determination of Vanillin with an Electrolytic Manganese Dioxide-Graphene Composite Modified Electrode

机译：电解二氧化锰-石墨烯复合修饰电极灵敏伏安法测定香兰素

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摘要

The electrolytic manganese dioxide - graphene (EMDG) composite was used in the construction of asensor, which showed strong electrocatalytic activity to the oxidation of vanillin in neutral solutions.Vanillin produces an anodic peak at about 0.67 V at this electrode. Several electrochemical parametersof these processes were further carefully calculated with the results of the charge transfer coefficient as 0.703 and the electron transferred number n as 2. The electrocatalytic behavior was further exploitedas a sensitive detection scheme for the vanillin determination by differential-pulse voltammetry (DPV).Under optimized conditions, the anodic peak current increased linearly with the vanillin concentration-7 -5 -1 -8 - over the range from 1.010 to 4.510 mol L . The detection limit was calculated as 3.210 mol L 1 (S/N=3). The proposed method was applied to the detection of biscuits and chocolates samples withsatisfactory results.
机译：电解二氧化锰-石墨烯（EMDG）复合材料用于传感器的构建，对中性溶液中的香兰素氧化具有较强的电催化活性，香兰素在该电极上产生约0.67 V的阳极峰。进一步仔细计算了这些过程的几个电化学参数，结果电荷转移系数为0.703，电子转移数n为2。进一步利用电催化行为作为灵敏的检测方案，通过差动脉冲伏安法（DPV）测定香兰素。在最佳条件下，随着香草醛浓度-7 -5 -1 -8-在1.010至4.510 mol L范围内，阳极峰值电流线性增加。计算出的检出限为3.210mol L 1（S / N ＝ 3）。该方法用于饼干和巧克力样品的检测，结果令人满意。

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