| 魏小龙,钱亚眩,张亚芳,王志华.化学通报,2018,81(3):223-230. |
| 基于多壁碳纳米管负载金纳米粒子修饰的甲基对硫磷分子印迹电化学传感器的研制 |
| Development of Methyl Parathim Molecularly Imprinted Electrochemical Sensors Based on Multi-walled Carbon Nanotubes Supported Gold Nanoparticles Modified |
| 投稿时间：2017-10-02 修订日期：2017-11-01 |
| DOI： |
| 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 imprinting Carbon nanotubes Au nanoparticles Electrochemical sensor |
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| 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). |
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