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首页> 外文期刊>International Journal of Electrochemical Science >A New Method for Puerarin Determination Based on Poly (Alizarin Red S/Graphene) Modified Electrode
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A New Method for Puerarin Determination Based on Poly (Alizarin Red S/Graphene) Modified Electrode

机译：聚茜素红S /石墨烯修饰电极测定葛根素的新方法

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摘要

A poly(alizarin red S/graphene) (PARS-GR) composite membrane modified glassy carbon electrodewas constructed by a facial one step electrodeposition method. The surface morphology andelectrochemical characteric of the modified electrode were investigated carefully by the assistance ofscanning electron microscopy and cyclic voltammetry, respectively. The electrochemical behavior ofpuerarin was investigated by cyclic voltammetry and a oxidation peak appeared at +0.61 V (vs. SCE)in pH 6.5 phosphate buffer solution. The PAR-GR/GCE displayed satisfactory electrochemicalproperties including higher conductivity and lower electron flowing resistance. The oxidation processof puerarin on PAR-GR/GCE surface is calculated to be a one-electron and one-proton transferprocess. Under the optimized experimental conditions, the oxidation peak current showed good-7 -4linearity with puerarin concentration under the range of 1.010 ~7.510 mol/L accompanied by a-8detection limit of 3.410 mol/L (3). The modified electrode was successfully utilized to examine thepuerarin samples with satisfactory results.
机译：采用面部一步电沉积法构建了聚（茜素红S /石墨烯）（PARS-GR）复合膜修饰玻碳电极。借助扫描电子显微镜和循环伏安法分别仔细研究了改性电极的表面形貌和电化学特性。通过循环伏安法研究了葛根素的电化学行为，在pH 6.5磷酸盐缓冲溶液中，氧化峰出现在+0.61 V（vs. SCE）处。 PAR-GR / GCE表现出令人满意的电化学性能，包括更高的电导率和更低的电子流阻。葛根素在PAR-GR / GCE表面的氧化过程经计算为单电子质子转移过程。在优化的实验条件下，葛根素浓度在1.010〜7.510 mol / L范围内，氧化峰电流表现出良好的-7 -4线性，且a-8的检出限为3.410 mol / L（3）。修饰电极成功用于葛根素样品的检测，结果令人满意。

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