基于ERGO/AuNPs-CS复合膜修饰电极测定双酚A  

Determination of bisphenol A using ERGO/AuNPs-CS modified electrode

作　　者：王毅梦 王书民 樊雪梅 李哲建 刘萍 李晓龙 屈佳 WANG Yimeng;WANG Shumin;FAN Xuemei;LI Zhejian;LIU Ping;LI Xiaolong;QU Jia(College of Chemical Engineering and Modern Materials of Shangluo University/Shanxi Key Laboratory of Comprehensive Utilization of Tailings Resources,Shangluo,726000)

机构地区：[1]商洛学院化学工程与现代材料学院/陕西省尾矿资源综合利用重点实验室,商洛726000

出　　处：《分析试验室》2020年第11期1312-1316,共5页Chinese Journal of Analysis Laboratory

基　　金：陕西省科技厅项目(2018JM2040);商洛学院科技创新团队项目(18SCX003);陕西省教育厅专项科研计划项目(19JK0252);商洛市科技计划项目(SK2019-81)资助。

摘　　要：采用电化学还原技术在玻碳电极(GCE)表面将氧化石墨烯(GO)直接还原为还原石墨烯(ERGO),再通过自组装技术,制备电化学还原氧化石墨烯/纳米金-壳聚糖(ERGO/AuNPs-CS)复合膜修饰电极,研究了双酚A(BPA)在该修饰电极上的电化学行为。结果表明:在磷酸盐缓冲溶液(pH 5. 8)中,双酚A在0. 497 V和0. 208 V处分别出现一氧化还原峰。优化条件下,双酚A的浓度在1. 0×10-10~1. 0×10-4mol/L范围内与其氧化峰电流成良好的线性关系,检出限为6. 67×10-11mol/L,相关系数R2=0. 9937。将该传感器用于塑料奶瓶及自来水中双酚A含量的检测,结果令人满意。The graphene-AuNPs-chitosan composite film( ERGO/Au NPs-CS) modified electrode was prepared by the self-assembly technique for the detection of bisphenol A( BPA). The research showed that BPA possessed great electrochemical behavior on the ERGO/Au NPs-CS modified electrode,the oxidation and reduction peak were obtained at 0. 497 V and 0. 208 V,respectively. Under the optimal conditions,the oxidation peak current was linear with the concentration of BPA in the range of 1. 0 × 10-10~ 1. 0 × 10-4 mol/L with a detection limit of6. 67 × 10-11 mol/L. The correlation coefficient was 0. 9937. The proposed method was applied for the determination of BPA in tap water and plastic baby bottles,and the results were satisfied.

关 键 词：石墨烯 纳米金-壳聚糖 双酚A 

分 类 号：O657.3[理学—分析化学]