Cu_2O微球修饰电极对动物源食品中土霉素的电化学测定  

Electrochemical Determination of Oxytetracycline in Animal-Derived Food based on Cu_2O Microspheres Modified Electrode

作　　者：孙俊永[1] 常琳 李含笑 刘杨晓 SUN Junyong;CHANG Lin;LI Hanxiao;LIU Yangxiao(College of Chemistry and Chemical Engineering,Xingyang Normal University,Xingyang 464000,China;No.1 Middle School of Guangling County of Shanxi Province,Datong 037500,China)

机构地区：[1]信阳师范学院化学化工学院,河南信阳464000 [2]广灵县第一中学校,山西大同037500

出　　处：《信阳师范学院学报（自然科学版）》2019年第1期126-131,共6页Journal of Xinyang Normal University(Natural Science Edition)

基　　金：国家自然科学基金项目(61201091);河南省科技攻关项目(162102210126)

摘　　要：利用Cu_2O微球修饰玻碳电极研究了土霉素的电化学行为,发现土霉素的氧化是一个受吸附控制的一质子、一电子参与的不可逆过程.在pH 4.8HAc-NaAc缓冲溶液中,开路富集180s后利用方波伏安法发展了高灵敏检测土霉素的电化学方法,线性范围为0.5～210"mol/L,检出限为0.15"mol/L(R_(SN)=3).该方法用于测定动物源食品中土霉素,回收率介于97.4%～107%之间.The electrochemical behaviors of oxytetracycline on Cu2O microspheres modified glassy carbon electrode were studied, and it was found that the oxidation of oxytetracycline was an adsorption-controlled, one-proton, one-electron, and irreversible process.In pH 4.8 HAc-NaAc buffer solution, an electrochemical method with high sensitivity was developed for the determination of oxytetracycline by using square wave voltammetry after an open-circuit accumulation at 0.4 V.The linear range was 0.5~210μmol/L and the limit of detection was 0.15 μmol/L ( RSN = 3).Finally, this method was applied for the determination of oxytetracycline in animal -derived food, and the recoveries were between 97.4%~107%.

关 键 词：Cu2O微球 电化学氧化 土霉素 动物源食品分析 

分 类 号：O657.15[理学—分析化学]