CuO Nanostructures Based Electrochemical Sensor for Simultaneous Determination of Hydroquinone and Ascorbic Acid,Electroanalysis

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CuO Nanostructures Based Electrochemical Sensor for Simultaneous Determination of Hydroquinone and Ascorbic Acid
Electroanalysis ( IF 2.7 ) Pub Date : 2020-04-29 , DOI: 10.1002/elan.202000083
Jamil A. Buledi ₁ , Sidra Ameen _{1,

2} , Nadir H. Khand ₁ , Amber R. Solangi ₁ , Iqleem H. Taqvi ₃ , Muhammad H. Agheem ₄ , Zahid Wajdan ₁

Affiliation

A simple, sensitive and reliable electrochemical sensor has been developed based on CuO nanostructures modified glassy carbon electrode for simultaneous determination of hydroquinone (HQ) and ascorbic acid (AA). The CuO nano material was synthesized by aqueous chemical growth method using different sources of OH. The characterization of nano material was performed by Fourier transform infrared spectroscopy, X‐ray diffraction, field emission scanning electron microscopy and energy dispersive X‐ray spectroscopy. The glassy carbon electrode was modified by CuO nano material using drop cast method and studied by cyclic voltammetry. The CuO/GCE exhibited excellent electrocatalytic activity towards the oxidations of HQ and AA in borate buffer solution (pH 8.0) and the corresponding electrochemical signals have appeared as two well resolved oxidation peaks with significant peak potential differences of (0.21V vs. Ag/AgCl). Differential pulse voltammetry was used for simultaneous determination of HQ and AA using the CuO/GCE. At the optimum conditions, for simultaneous determination by synchronous change of the analyte concentrations, the linear response ranges were between 0.0003–0.355 mM for HQ and 0.0001–0.30 mM for AA respectively. Furthermore, CuO/GCE was successfully applied for the independent determination of AA in fruit juices as well as for the simultaneous determination of HQ and AA in cosmetic samples.

中文翻译：

基于CuO纳米结构的电化学传感器同时测定对苯二酚和抗坏血酸

基于CuO纳米结构修饰的玻碳电极开发了一种简单，灵敏，可靠的电化学传感器，用于同时测定对苯二酚（HQ）和抗坏血酸（AA）。通过水化学生长方法使用不同的OH源合成了CuO纳米材料。纳米材料的表征通过傅立叶变换红外光谱，X射线衍射，场发射扫描电子显微镜和能量色散X射线光谱进行。玻碳电极采用滴铸法通过CuO纳米材料改性，并通过循环伏安法研究。CuO / GCE在硼酸盐缓冲溶液（pH 8）中对HQ和AA的氧化表现出出色的电催化活性。0），并且相应的电化学信号显示为两个良好解析的氧化峰，具有明显的峰电势差（0.21V vs. Ag / AgCl）。差示脉冲伏安法使用CuO / GCE同时测定HQ和AA。在最佳条件下，为了通过分析物浓度的同步变化同时测定，线性响应范围分别为HQ 0.0003–0.355 mM和AA 0.0001–0.30 mM。此外，CuO / GCE已成功应用于果汁中AA的独立测定以及化妆品样品中HQ和AA的同时测定。在最佳条件下，为了通过分析物浓度的同步变化同时测定，线性响应范围分别为HQ 0.0003–0.355 mM和AA 0.0001–0.30 mM。此外，CuO / GCE已成功应用于果汁中AA的独立测定以及化妆品样品中HQ和AA的同时测定。在最佳条件下，为了通过分析物浓度的同步变化同时测定，线性响应范围分别为HQ 0.0003–0.355 mM和AA 0.0001–0.30 mM。此外，CuO / GCE已成功应用于果汁中AA的独立测定以及化妆品样品中HQ和AA的同时测定。

更新日期：2020-04-29

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