摘要
采用循环伏安法制备聚γ-氨基丁酸修饰电极,并对聚合条件进行了优化,以建立测定食品中莱克多巴胺含量的电化学分析方法。用循环伏安或差分脉冲法探讨了莱克多巴胺在聚γ-氨基丁酸修饰电极上的电化学行为。结果表明,莱克多巴胺的氧化峰电流与其浓度在6.0×10-8~1.0×10-5 mol/L范围线性关系良好,R 2=0.998 8。检出限为8.0×10-9 mol/L。回收率为98.0%~102%,RSD为2.3%~3.1%。循环伏安法简单、快速、灵敏,为莱克多巴胺的测定提供了新方法,为食品控制提供了依据。
To establish a method for the determination of ractopamine in food by poly-γ-aminobutyric acid modified electrode,the poly-γ-aminobutyric acid was synthesized on the surface of glassy carbon electrode using an electrochemical method.The polymerization conditions of poly-γ-aminobutyric acid modified electrode were discussed and optimized.Electrochemical behavior of ractopamine was investigated at poly modified electrode by cyclic voltammetry or differential pulse method.A good linear relationship was obtained between the oxidation peak current and concentration of ractopamine in the range of 6.0×10-8-1.0×10-5 mol/L(R=0.998 8),with the detection limit of 8.0×10-9 mol/L.The recoveries ranged from 98.0%to 102%,and RSD was 2.3%-3.1%.This method is simple,rapid and sensitive,which creates a new method for the determination of ractopamine and provides a basis for food control.
作者
陈美凤
孙章华
程道娟
赵延慧
马心英
CHEN Meifeng;SUN Zhanghua;CHENG Daojuan;ZHAO Yanhui;MA Xinying((College of Chemistry and Chemical Engineering of Heze University,Heze 274015,China;Environmental Monitoring Central Station of Heze,Heze 274000,China)
出处
《食品与发酵工业》
CAS
CSCD
北大核心
2019年第20期262-266,共5页
Food and Fermentation Industries
基金
国家自然科学基金项目(21602097)
山东省高校科技计划项目(J17KB062)
菏泽学院海外智力为国服务行动计划
