壳聚糖-石墨烯修饰电极检测食用油中没食子酸丙酯  

Determination of Propyl Gallate in Edible Oil by Chitosan-Graphene Modified Electrode

作　　者：刘立华[1] 刘会媛[1] Liu Lihua;Liu Huiyuan(Department of Chemistry,Tangshan Normal University,Tangshan 063000,China)

机构地区：[1]唐山师范学院化学系,河北唐山063000

出　　处：《南开大学学报（自然科学版）》2021年第5期106-112,共7页Acta Scientiarum Naturalium Universitatis Nankaiensis

基　　金：河北省教育厅教改项目(2016GJJG181);唐山师范学院2018年大学生创新创业训练计划项目(CX201811)。

摘　　要：以壳聚糖-石墨烯的混合液修饰玻碳电极,研究没食子酸丙酯(PG)的电化学性质,表明PG在该电极上为不可逆氧化过程,并建立了一种快速检测食用油中PG的新方法.优化该电极测定PG的实验条件,结果表明:采用循环伏安法,在扫速50 mV·s^(-1),壳聚糖-石墨烯修饰液用量5μL,pH=7.0的柠檬酸-柠檬酸三钠缓冲溶液作底液,PG浓度在8-70 mg·L^(-1)间与峰电流值有良好的线性关系,校准方程为I=0.0927c_(PG)+4.6511,相关系数为0.9956,检出限0.038 mg·L^(-1).该方法应用于食用油中PG含量的测定,平均回收率99.81%,可应用于PG的检测.The electrochemical properties of propyl gallate(PG)were studied by modifying glassy carbon electrode with a mixture of chitosan and graphene.The resμLts showed that PG was an irreversible oxidation process on the electrode,and a new method for rapid determination of PG in edible oil was established.The experimental conditions for the determination of PG with the modified electrode were optimized.The resμLts showed that cyclic voltammetry was used as the base solution at a scanning speed of50 m V·s^(-1),5μL of a mixed modified solution of chitosan-graphene and a buffer solution of citric acidtrisodium citrate with a pH of 7.0.There is a good linear relationship between the concentration of PGand its peak current value in the range of 8-70 mg·L^(-1).The calibration equation is I=0.0927c_(PG)+4.6511,the correlation coefficient is 0.9956,and the detection limit is 0.038 mg·L^(-1).The method has been applied to the determination of PG in edible oils with average recovery rate was 99.81%,and can be applied to the determination of PG.

关 键 词：没食子酸丙酯 循环伏安法 石墨烯 壳聚糖 食用油 

分 类 号：O657.14[理学—分析化学]