title: Electrochemical nonenzymatic sensor based on CoO decorated reduced graphene oxide for the simultaneous determination of carbofuran and carbaryl in fruits and vegetables.
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.
authors.affiliation: 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. Electronic address: mingyanlyg@hotmail.com.
authors.forename: MingYan
authors.initials: M
authors.lastname: Wang
authors.affiliation: Department of Chemical Engineering, Huaihai Institute of Technology, Lianyungang 222005, China.
authors.forename: JunRao
authors.initials: J
authors.lastname: Huang
authors.affiliation: 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.
authors.forename: Meng
authors.initials: M
authors.lastname: Wang
authors.affiliation: Department of Chemical Engineering, Huaihai Institute of Technology, Lianyungang 222005, China.
authors.forename: DongEn
authors.initials: D
authors.lastname: Zhang
authors.affiliation: 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. Electronic address: junc@uow.edu.au.
authors.forename: Jun
authors.initials: J
authors.lastname: Chen
mesh_terms: D012721:Carbaryl / Q000737:chemistry*; D002235:Carbofuran / Q000737:chemistry*; D004563:Electrochemistry / Q000295:instrumentation* / Q000379:methods; D005638:Fruit / Q000737:chemistry*; D006108:Graphite; D010087:Oxides; D010575:Pesticides; D014675:Vegetables / Q000737:chemistry*
chemical_list: D010087:Oxides; D010575:Pesticides; D006108:Graphite; D012721:Carbaryl; D002235:Carbofuran
keywords: Carbamate pesticides; Cobalt (II) oxide; Nonenzymatic; Reduced graphene oxide; Sensor