酪氨酸在电还原氧化石墨烯修饰电极上的电化学行为及其在食品中的测定  

Electrochemical Behavior of Tyrosine at Electrochemically Reduced Graphene Oxide Modified Electrode and Its Determination in Food Samples

作　　者：邓培红 宋玲 Deng Peihong;Song Ling(College of Chemistry and Materials Science,Hengyang Normal University,Hengyang Hunan 421008,China;The No.9 Middle School of Hengyang City,Hengyang Hunan 421008,China)

机构地区：[1]衡阳师范学院化学与材料科学学院,湖南衡阳421008 [2]衡阳市第九中学,湖南衡阳421008

出　　处：《衡阳师范学院学报》2024年第3期47-53,共7页Journal of Hengyang Normal University

基　　金：湖南省教育厅一般项目(22C0401);湖南省功能金属有机化合物重点实验室基金项目(2022HSKFJJ026)资助。

摘　　要：基于电还原氧化石墨烯修饰玻碳电极(ERGO/GCE)构建了一种灵敏的酪氨酸(Tyr)伏安传感器,研究了Tyr在该传感器上的电化学行为。在0.1 mol/L硫酸溶液中,与裸GCE相比,Tyr的氧化峰电流在ERGO/GCE上显著增加,表明ERGO对Tyr具有较强的电催化活性。对实验条件进行了优化,并对氧化机理进行了探讨。在最佳实验条件下,Tyr的校准曲线在0.2-100μmol/L范围内呈良好的线性关系(R^(2)=0.9989),检测限(LOD)为0.06μmol/L (S/N=3)。此外,ERGO/GCE对Tyr的测定具有良好的重现性、稳定性、选择性和较高的灵敏度,可应用于食品中Tyr的测定。Based on electrochemical reduced graphene oxide modified glassy carbon electrode(ERGO/GCE),a sensitive voltammetirc sensor was constructed and the electrochemical behavior of tyrosine(Tyr)on the sensor was studied.In 0.1 mol/L H2SO4 solution,com-pared with bare GCE,the oxidation peak current of Tyr increased significantly,indicating that ERGO exhibits strong electrocatalytic ac-tivity towards Tyr.The experimental conditions were optimized and the oxidation mechanism was discussed.Under the optimal experi-mental conditions,the calibration curve of Tyr is linear in the range of 0.2-100μmol/L(R2=0.9989),the limit of detection(LOD)is 0.06μmol/L.In addition,the ERGO/GCE showed good repeatability,long stability,excellent selectivity and high sensitivity towards the determination of Tyr,which makes it suitable for the determination of Tyr in food samples.

关 键 词：氧化石墨烯 电还原 酪氨酸 伏安法测定 

分 类 号：O657.1[理学—分析化学]