对苯二酚在纳米钴/ l-谷氨酸修饰电极上的电化学行为研究。

A study on the electrochemical behavior of hydroquinone at a nanometer cobalt/l-glutamate-modified electrode.

作者信息

Huang Baomei, Yao Chengwei, Yang Jing, Du Shizhuang, Lu Xiaoquan

机构信息

College of Chemistry & Chemical Engineering, MianYang Normal University MianYang 621000 China

Facility Design and Instrumentation Institute, China Aerodynamics Research and Development Center MianYang 621000 China.

出版信息

RSC Adv. 2020 Dec 8;10(71):43834-43839. doi: 10.1039/d0ra07222b. eCollection 2020 Nov 27.

A new electrochemical sensor for hydroquinone (HQ) was prepared. The electrochemical sensor was modified by electrodeposition and electrochemical polymerization to modify nanometer cobalt (nano-Co) and poly-l-glutamic acid (poly-l-glu) on the surface of a glassy carbon electrode (GCE). Then, the electrochemical behavior of hydroquinone on the electrochemical sensor was investigated by cyclic voltammetry (CV). The experimental conditions were optimized from the aspects of electrolyte type, concentration, acidity, enrichment time and scanning speed. The experimental results showed that under optimized conditions the oxidation peak current has a good linear relationship with the concentration of hydroquinone in the range of 3.85 × 10 to 1.30 × 10 mol L ( = 0.9998). Moreover, there was a low detection limit of 4.97 × 10 mol L. When the sensor was used for the analysis of hydroquinone in water samples, the recoveries with satisfactory results were in the range of 97.2-102.6%.

制备了一种用于对苯二酚（HQ）的新型电化学传感器。通过电沉积和电化学聚合对该电化学传感器进行修饰，以在玻碳电极（GCE）表面修饰纳米钴（nano-Co）和聚-L-谷氨酸（poly-L-glu）。然后，采用循环伏安法（CV）研究了对苯二酚在该电化学传感器上的电化学行为。从电解质类型、浓度、酸度、富集时间和扫描速度等方面对实验条件进行了优化。实验结果表明，在优化条件下，氧化峰电流与对苯二酚浓度在3.85×10至1.30×10 mol/L范围内具有良好的线性关系（r = 0.9998）。此外，检测限低至4.97×10 mol/L。当该传感器用于分析水样中的对苯二酚时，回收率在97.2 - 102.6%范围内，结果令人满意。