石墨烯修饰硼掺杂金刚石电极上西维因和百草枯农药的同时伏安检测

Simultaneous Voltammetric Detection of Carbaryl and Paraquat Pesticides on Graphene-Modified Boron-Doped Diamond Electrode.

作者信息

Pop Aniela, Manea Florica, Flueras Adriana, Schoonman Joop

机构信息

Department of Applied Chemistry and Environmental Engineering and Inorganic Compounds, Politehnica University of Timisoara, P-ta Victoriei No. 2, 300006 Timisoara, Romania.

Faculty of Applied Sciences, Department of Chemical Technology, Section Materials for Energy Conversion and Storage, Delft University of Technology, Lorentzweg 1, 2628 CJ Delft, The Netherlands.

出版信息

Sensors (Basel). 2017 Sep 6;17(9):2033. doi: 10.3390/s17092033.

Monitoring of pesticide residues in food, beverages, and the environment requires fast, versatile, and sensitive analyzing methods. Direct electrochemical detection of pesticides could represent an efficient solution. Adequate electrode material, electrochemical technique, and optimal operation parameters define the detection method for practical application. In this study, cyclic voltammetric and differential pulse voltammetric techniques were used in order to individually and simultaneously detect two pesticides, i.e., carbaryl (CR) and paraquat (PQ), from an acetate buffer solution and also from natural apple juice. A graphene-modified boron-doped diamond electrode, denoted BDDGR, was obtained and successfully applied in the simultaneous detection of CR and PQ pesticides, using the differential pulse voltammetric technique with remarkable electroanalytical parameters in terms of sensitivity: 33.27 μA μM cm for CR and 31.83 μA μM cm for PQ. These outstanding results obtained in the acetate buffer supporting electrolyte allowed us to simultaneously detect the targeted pesticides in natural apple juice.

监测食品、饮料和环境中的农药残留需要快速、通用且灵敏的分析方法。农药的直接电化学检测可能是一种有效的解决方案。合适的电极材料、电化学技术和最佳操作参数决定了实际应用中的检测方法。在本研究中，采用循环伏安法和差分脉冲伏安法，分别从醋酸盐缓冲溶液和天然苹果汁中单独及同时检测两种农药，即西维因（CR）和百草枯（PQ）。制备了一种石墨烯修饰的硼掺杂金刚石电极，记为BDDGR，并成功应用于CR和PQ农药的同时检测，采用差分脉冲伏安法，在灵敏度方面具有显著的电分析参数：CR为33.27 μA μM⁻¹ cm⁻²，PQ为31.83 μA μM⁻¹ cm⁻²。在醋酸盐缓冲支持电解质中获得的这些优异结果使我们能够同时检测天然苹果汁中的目标农药。