基于氧化钴修饰还原氧化石墨烯的电化学非酶传感器用于同时测定水果和蔬菜中的克百威和西维因。

Electrochemical nonenzymatic sensor based on CoO decorated reduced graphene oxide for the simultaneous determination of carbofuran and carbaryl in fruits and vegetables.

作者信息

Wang MingYan, Huang JunRao, Wang Meng, Zhang DongEn, Chen Jun

机构信息

Department of Chemical Engineering, Huaihai Institute of Technology, Lianyungang 222005, China; Intelligent Polymer Research Institute, ARC Centre of Excellence for Electromaterials Science, Australian Institute of Innovative Materials, University of Wollongong, Northfields Avenue, Wollongong, NSW 2522, Australia.

Department of Chemical Engineering, Huaihai Institute of Technology, Lianyungang 222005, China.

出版信息

Food Chem. 2014 May 15;151:191-7. doi: 10.1016/j.foodchem.2013.11.046. Epub 2013 Nov 18.

DOI:10.1016/j.foodchem.2013.11.046

PMID:24423520

Abstract

A novel nonenzymatic sensor based on cobalt (II) oxide (CoO)-decorated reduced graphene oxide (rGO) was developed for the detection of carbofuran (CBF) and carbaryl (CBR). Two well-defined and separate differential pulse voltammetric peaks for CBF and CBR were obtained with the CoO/rGO sensor in a mixed solution, making the simultaneous detection of both carbamate pesticides possible. The nonenzymatic sensor demonstrated a linear relationship over a wide concentration range of 0.2-70 μM (R=0.9996) for CBF and 0.5-200 μM (R=0.9995) for CBR. The lower detection limit of the sensor was 4.2 μg/L for CBF and 7.5 μg/L for CBR (S/N=3). The developed sensor was used to detect CBF and CBR in fruit and vegetable samples and yielded satisfactory results.

摘要

开发了一种基于氧化钴（CoO）修饰的还原氧化石墨烯（rGO）的新型非酶传感器，用于检测克百威（CBF）和西维因（CBR）。使用CoO/rGO传感器在混合溶液中获得了两个清晰且分离的差分脉冲伏安峰，分别对应CBF和CBR，从而实现了两种氨基甲酸酯类农药的同时检测。该非酶传感器在0.2 - 70 μM的宽浓度范围内对CBF呈现线性关系（R = 0.9996），对CBR在0.5 - 200 μM浓度范围内呈现线性关系（R = 0.9995）。该传感器对CBF的检测下限为4.2 μg/L，对CBR的检测下限为7.5 μg/L（S/N = 3）。所开发的传感器用于检测水果和蔬菜样品中的CBF和CBR，结果令人满意。