多巴胺在纳米金/玻碳微球/离子液体复合电极上的电化学行为及测定  

Electrochemical behavior and determination of dopamine on gold nanoparticles/glassy carbon microspheres/ionic liquid composite electrodes

作　　者：刘新胜[1] 闻丹 任彬彬 李永红 LIU Xin-sheng;WEN Dan;REN Bin-bin;LI Yong-hong(School of Basic Medical Sciences,Ningxia Medical University,Yinchuan 750004,China;School of Public Health and Management,Ningxia Medical University,Yinchuan 750004,China)

机构地区：[1]宁夏医科大学基础医学院,宁夏银川750004 [2]宁夏医科大学公共卫生与管理学院,宁夏银川750004

出　　处：《应用化工》2018年第9期2037-2040,2044,共5页Applied Chemical Industry

基　　金：宁夏高等学校科学研究项目(NGY2016118)

摘　　要：通过组合法构建了纳米金/玻碳微球/离子液体复合电极(Au@GCILE),采用方波伏安法(SWV)研究多巴胺(DA)在该电极上的电化学行为,讨论多巴胺在电极表面的反应过程。结果表明,与普通碳离子液体电极相比,多巴胺在纳米金/玻碳微球/离子液体复合电极(Au@GCILE)上的峰电流显著增加,说明复合材料对多巴胺具有更好的电催化活性。在优化的条件下,DA的氧化峰电流与其溶液浓度在0. 5~300μmol/L范围内呈良好的线性关系(r2=0. 991 6),检测限为0. 1μmol/L。该电极具有良好的重现性与选择性,可用于实际样品中DA的检测。A gold nanoparticles/glassy carbon microspheres/ionic liquid composite electrode(Au@GCILE)was constructed using combination method based on the excellent electrochemical properties of nano-composite materials.The electrochemical behavior of dopamine at the modified electrode was investigated by square wave voltammetry(SWV).Results showed that compared with the carbon ionic liquid electrode,peak current of dopamine increased significantly at gold nanoparticles/glassy carbonmicros pheres/ionic liquid composite electrode(Au@GCILE),indicating the composite materials showed better electrocatalytic activity to DA.Under the optimized conditions,the linear responses of DA was in the concentratio n ranges of 0.5~300μmol/L with the detection limit of 0.1μmol/L.The modified electrode has good repeatability and selectivity,and this method can be used for the detection of DA in real samples.

关 键 词：纳米金 玻碳微球 离子液体 复合电极 多巴胺 方波伏安法 

分 类 号：TQ150.1[化学工程—电化学工业] TQ016.1