槲皮素
离子液体
氯化胆碱
电化学气体传感器
电化学
石墨烯
化学
傅里叶变换红外光谱
检出限
电极
氯化物
共晶体系
支撑电解质
电解质
玻璃碳
核化学
循环伏安法
色谱法
无机化学
化学工程
材料科学
纳米技术
有机化学
物理化学
催化作用
抗氧化剂
合金
工程类
作者
Meiling Guo,Zhangxu Wang,Zixin Wang,Lin Zhang
出处
期刊:Analytical Methods
[The Royal Society of Chemistry]
日期:2023-01-01
卷期号:15 (10): 1378-1386
被引量:4
摘要
Electrochemical techniques have been applied to determine quercetin and to evaluate its antioxidant effect. Deep eutectic solvents as a new generation of green solvents are promising electrolyte catalytically active additives for electrochemical oxidation of quercetin. Herein, in this work, Au was directly electrodeposited on the surface of graphene-modified glassy carbon electrodes, and AuNPs/GR/GC electrodes were fabricated. Choline chloride-based ionic liquids as deep eutectic solvents were readily prepared and applied to detect quercetin in buffer solutions, allowing a detection enhancement. X-ray diffraction and scanning electron microscopy were carried out to characterize the morphology of AuNPs/GR/GCE. Fourier transform infrared spectroscopy was carried out to interpret the H-bond interactions between the DES and quercetin. This electrochemical sensor exhibited good analytical performance. The low detection limit was reduced to 0.5 μM in a 15% DES solution, which was 300% higher than the signal without DES. It proved to be fast and environmentally friendly for the determination of quercetin and the DES had no effect on antioxidant effects of quercetin. In addition, it has been successfully applied in real sample analysis.
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