title: Novel Signal-Amplified Fenitrothion Electrochemical Assay, Based on Glassy Carbon Electrode Modified with Dispersed Graphene Oxide.
abstract: A novel signal-amplified electrochemical assay for the determination of fenitrothion was developed, based on the redox behaviour of organophosphorus pesticides on a glassy carbon working electrode. The electrode was modified using graphene oxide dispersion. The electrochemical response of fenitrothion at the modified electrode was investigated using cyclic voltammetry, current-time curves, and square-wave voltammetry. Experimental parameters, namely the accumulation conditions, pH value, and volume of dispersed material, were optimised. Under the optimum conditions, a good linear relationship was obtained between the oxidation peak current and the fenitrothion concentration. The linear range was 1-400 ng·mL(-1), with a detection limit of 0.1 ng·mL(-1) (signal-to-nose ratio = 3). The high sensitivity of the sensor was demonstrated by determining fenitrothion in pakchoi samples.
authors.affiliation: College of Plant Protection (Key Laboratory of Integrated Management of Crop Diseases and Pests), Nanjing Agricultural University, Nanjing, 210095, P.R. China.
authors.forename: Limin
authors.initials: L
authors.lastname: Wang
authors.affiliation: College of Plant Protection (Key Laboratory of Integrated Management of Crop Diseases and Pests), Nanjing Agricultural University, Nanjing, 210095, P.R. China.
authors.forename: Jinbo
authors.initials: J
authors.lastname: Dong
authors.affiliation: College of Plant Protection (Key Laboratory of Integrated Management of Crop Diseases and Pests), Nanjing Agricultural University, Nanjing, 210095, P.R. China.
authors.forename: Yulong
authors.initials: Y
authors.lastname: Wang
authors.affiliation: College of Plant Protection (Key Laboratory of Integrated Management of Crop Diseases and Pests), Nanjing Agricultural University, Nanjing, 210095, P.R. China.
authors.forename: Qi
authors.initials: Q
authors.lastname: Cheng
authors.affiliation: College of Plant Protection (Key Laboratory of Integrated Management of Crop Diseases and Pests), Nanjing Agricultural University, Nanjing, 210095, P.R. China.
authors.forename: Mingming
authors.initials: M
authors.lastname: Yang
authors.affiliation: College of Plant Protection (Key Laboratory of Integrated Management of Crop Diseases and Pests), Nanjing Agricultural University, Nanjing, 210095, P.R. China.
authors.forename: Jia
authors.initials: J
authors.lastname: Cai
authors.affiliation: College of Plant Protection (Key Laboratory of Integrated Management of Crop Diseases and Pests), Nanjing Agricultural University, Nanjing, 210095, P.R. China.|Institute of Plant Protection, Jiangsu Academy of Agricultural Science, Nanjing, 210014, P.R. China.
authors.forename: Fengquan
authors.initials: F
authors.lastname: Liu