巯基化石墨烯复合物修饰电极用于高敏检测多巴胺

• 作 者: 张议;苏招红;谢青季;姚守拙;
• 机 构: 湖南师范大学化学生物学及中药分析教育部重点实验室,化学化工学院,长沙410081
• 出 处: 第十二届全国电分析化学学术会议
• 发表日期: 2014年期

　　Polypyrrole (PPy) was firstly electrodeposited on the electroreduced GO (ERGO) modified GCE.Meso-2,3-dimercaptosuccinic acid (DMSA) was tethered to the electrooxidized PPy via the thiolation reaction with the aid of ultraviolet light,followed by overoxidation of PPy (OPPy),and a DMSA-OPPy/ERGO/GCE was finally prepared (Fig.1).The prepared DMSA-OPPy/ERGO/GCE was successfully used for electroanalysis of dopamine (DA) at neutral pH.Electrochemical quartz crystal microbalance,scanning electron microscopy and Fourier transform infrared spectroscopy were used for film characterization and process monitoring.The anodic amperometric detection of DA provides a limit of detection (5 nM,S/N=3) and a wide linear detection range (10 nM to 2 μM).