中文关键词:分子印迹碳纳米管金纳米粒子电化学传感器 英文关键词:Molecular imprintingCarbon nanotubesAu nanoparticlesElectrochemical sensor 基金项目:

作者	单位	E-mail
魏小龙	西北师范大学化学化工学院 甘肃省生物电化学与环境分析重点实验室 兰州 730070	karifwxl@vip.qq.com
钱亚眩	西北师范大学化学化工学院 甘肃省生物电化学与环境分析重点实验室 兰州 730070
张亚芳	西北师范大学化学化工学院 甘肃省生物电化学与环境分析重点实验室 兰州 730070
王志华	西北师范大学化学化工学院 甘肃省生物电化学与环境分析重点实验室 兰州 730070	348335918@qq.com

摘要点击次数:1860 全文下载次数:0 中文摘要: 本文以四氨基苯硫酚(p-ATP)作为功能单体,甲基对硫磷(MP)作为模板分子,通过电聚合的方法,在多壁碳纳米管(WMCNTs)负载金纳米粒子(AuNPs)修饰的玻碳电极(GCE)表面成功地构建了甲基对硫磷分子印迹电化学传感器。借助循环伏安法(CV)、电化学阻抗法(EIS)和差示脉冲法(DPV)等方法对传感器的印迹效果进行了表征。实验结果表明,电聚合方法制备的甲基对硫磷分子印迹电化学传感器,能够成功地检测实际样品中的甲基对硫磷的含量。同时发现,在1×10_-8 ~ 1×10_-5mol/L浓度范围内,甲基对硫磷浓度的对数与其峰电流强度呈现良好的线性关系,线性回归方程为：Ip(μA) = 47.82+4.178 logC (mol/L),相关系数R₂ = 0.9941,检测限为3.3×10_-9 mol/L(S/N=3)。最后,利用所构建的传感器对黄河水样中的甲基对硫磷采用加标回收率的方法进行了测定,效果良好。与其他方法相比,该方法无需进行预处理,选择性好、灵敏度高、重现性好,为分析检测甲基对硫磷分子提供了一种非常有效的方法。 英文摘要: The methyl parathion molecularly imprinted electrochemical sensor was constructed based on WMCNTs and AuNPs, with tetramethylthiophenol (p-ATP) as functional monomer and methyl parathion (MP) as template molecul by electrochemical polymerization method. And it was characterized by cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS) and differential pulse method (DPV). The experimental results showed that it is feasible that prepared molecularly imprinted electrochemical sensors to detect methyl parathion (MP) by electro-polymerization. Besides, There was a good linear relationship between the logarithm of methyl parathion concentration and the peak current in the range of 1×10_-8~1×10_-5 mol/L. And the linear regression equation was Ip(μA) = 47.82 + 4.178 LogC(mol/L), with the correlation coefficient 0.9941 and the detection limit 3.3×10_-9mol/L (S/N=3). Finally, the prepared sensor was used to measure the methyl parathion in the actual sample, and the result could be accepted. Compared with other methods, this method had some advantages, including easy preparation, good selectivity, high sensitivity and well reproducibility. It provided a very effective method for analysis the methyl parathion (MP). 查看全文查看/发表评论下载PDF阅读器 相关附件：版权转让声明书 -->