石墨烯/聚嘧啶复合膜修饰电极用于甲基对硫磷的电化学测定  

Graphene/polypyrimidine composite film modified electrode for electrochemical determination of methyl parathion

作　　者：付菊[1,2] 谭小红[2] 宋新建[1,2] 

机构地区：[1]湖北民族学院生物资源保护与利用湖北省重点实验室,湖北恩施445000 [2]湖北民族学院化学与环境工程学院,湖北恩施445000

出　　处：《华中师范大学学报（自然科学版）》2016年第4期565-570,587,共7页Journal of Central China Normal University：Natural Sciences

基　　金：国家自然科学基金资助项目(21561011);湖北民族学院科研创新团队项目(MY2014T004)

摘　　要：采用一步电沉积法制备了石墨烯/聚嘧啶复合膜修饰电极.利用循环伏安法和方波伏安法研究了甲基对硫磷在该复合膜电极上的电化学行为.结果表明,该复合膜对甲基对硫磷具有灵敏度高、响应速度快等特点.在最佳条件下,甲基对硫磷的峰电流响应与其浓度在0.000 3-2.5μmol/L范围内呈现良好的线性关系,检测限为0.05nmol/L.该石墨烯/聚嘧啶复合膜修饰玻碳电极也表现出良好的稳定性、重现性和抗干扰能力,并可用于实际样品的检测。A modified electrode was fabricated by one-step electrodeposition of graphene/polypyrimidine composite film on glass carbon electrode surface（rGO/pAMP/GCE）.Electrochemcial behaviors of methyl parathion（MP）on rGO/pAMP/GCE were investigated with Cyclic Voltammetry（CV）and Square Wave Voltammetry（SWV）.The results indicated that the rGO/pAMP composite film possesses good sensitivity and fast response for MP.Under the optimal conditions,current response plotted with MP concentration was line in 0.000 3-2.5μmol/L with a detection limit of 0.05nmol/L.The rGO/pAMP/GCE was employed for MP determination in real samples because of its high stability,reproducibility and anti-interference.

关 键 词：一步电沉积 石墨烯 4-氨基-2-巯基嘧啶 修饰电极 甲基对硫磷 

分 类 号：O657.1[理学—分析化学]