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首页> 外文期刊>International Journal of Electrochemical Science >Highly Selective Differential Pulse Voltammetric Determination of Uric Acid using Modified Glassy Carbon Electrode
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Highly Selective Differential Pulse Voltammetric Determination of Uric Acid using Modified Glassy Carbon Electrode

机译：修饰玻碳电极高选择性微分脉冲伏安法测定尿酸

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摘要

A nanocomposite was prepared by incorporating Fe3O4 onto graphene sheets, and then a layer of SiO2 were deposited on the surface of the Fe3O4/graphene composites. This modified electrode was used for electrochemical determination of uric acid (UA). Cyclic voltammetry, differential pulse voltammetry and chronoamperometry were used to investigate the electrochemical behavior of uric acid at the chemically modified electrode. According to the results, Fe3O4@SiO2/GO/GCE showed high electrocatalytic activity for uric acid oxidation, producing a sharp oxidation peak current at 330 mV vs. Ag/AgCl reference electrode at pH 7.0. The peak current was linearly dependent on uric acid concentration over the range of 0.5 to 250.0 μM with the detection limit (3σ) of 0.07 μM. The proposed method was successfully applied as a rapid, highly selective, simple, and precise one to determine uric acid in urine.
机译：通过将Fe3O4掺入石墨烯片制备纳米复合材料，然后在Fe3O4 /石墨烯复合材料的表面沉积一层SiO2。该修饰的电极用于尿酸（UA）的电化学测定。使用循环伏安法，差分脉冲伏安法和计时安培法研究了尿酸在化学修饰电极上的电化学行为。根据结果​​，Fe3O4 @ SiO2 / GO / GCE对尿酸氧化显示出高电催化活性，在pH 7.0时，相对于Ag / AgCl参比电极，在330 mV时产生尖锐的氧化峰电流。峰值电流在0.5至250.0μM范围内线性依赖于尿酸浓度，检测极限（3σ）为0.07μM。所提出的方法已成功地作为一种快速，高度选择性，简单而精确的方法来测定尿中的尿酸。

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