Sensitive voltammetric determination of baicalein at thermally reduced graphene oxide modified glassy carbon electrode

Zhang D.; Zhang Y.; He L.

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Sensitive voltammetric determination of baicalein at thermally reduced graphene oxide modified glassy carbon electrode

机译：热还原氧化石墨烯修饰玻碳电极灵敏伏安法测定黄ical素

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This work presents a sensitive voltammetric method for determination of the flavonoid baicalein by using a thermally reduced graphene oxide (TRGO) modified glassy carbon electrode (GCE) in 100mM KCl-10mM sodium phosphate buffer solution (pH7.40). The surface morphology and structure of TRGO investigated by atomic force microscopy, FT-IR spectroscopy and Raman spectroscopy reveal that the TRGO prepared maintained as single or bilayer sheets and with significant edge-plane-like defect sites. The TRGO/GCE modified electrode shows more favorable electron transfer kinetics for potassium ferricyanide and potassium ferrocyanide probe molecules, which are important electroactive compounds, compared with bare GCE and GO/GCE electrodes. The electrochemical behaviors of baicalein at the TRGO/GCE were investigated by cyclic voltammetry, suggesting that the TRGO/GCE exhibits excellent electrocatalytic activity to baicalein. Under physiological conditions, the modified electrode showed linear voltammetric response from 10nM to 10μM for baicalein, with a detection limit of 6.0nM. This work demonstrates that the graphene-modified electrode is a promising tool for electrochemical determination of flavonoid drugs.

机译：这项工作提出了一种灵敏的伏安法，通过在100mM KCl-10mM磷酸钠缓冲溶液（pH7.40）中使用热还原的氧化石墨烯（TRGO）修饰的玻碳电极（GCE）来测定类黄酮黄ical素。通过原子力显微镜，FT-IR光谱和拉曼光谱研究了TRGO的表面形态和结构，发现所制备的TRGO保持为单层或双层，并具有明显的边缘平面状缺陷部位。与裸露的GCE和GO / GCE电极相比，TRGO / GCE修饰电极对重要的电活性化合物铁氰化钾和亚铁氰化钾探针分子显示出更有利的电子转移动力学。通过循环伏安法研究了黄ical素在TRGO / GCE上的电化学行为，表明TRGO / GCE对黄ical素具有出色的电催化活性。在生理条件下，修饰电极对黄ical素的线性伏安响应为10nM至10μM，检出限为6.0nM。这项工作表明，石墨烯修饰的电极是一种有前途的电化学测定类黄酮药物的工具。

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《Electroanalysis》 |2013年第9期|共9页
作者
Zhang D.; Zhang Y.; He L.;
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原文格式 PDF
正文语种 eng
中图分类 54.24;
关键词
Baicalein; Electrochemistry; Graphene; Modified electrodes; Voltammetry;

机译：黄ical素;电化学;石墨烯;修饰电极;伏安法;

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1. Sensitive voltammetric determination of baicalein at thermally reduced graphene oxide modified glassy carbon electrode [J] . Zhang D., Zhang Y., He L. Electroanalysis . 2013,第9期

机译：热还原氧化石墨烯修饰玻碳电极灵敏伏安法测定黄ical素
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Sensitive voltammetric determination of baicalein at thermally reduced graphene oxide modified glassy carbon electrode

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