title: Determination of trace 2,4-dinitrophenol in surface water samples based on hydrophilic molecularly imprinted polymers/nickel fiber electrode.
abstract: A rapid, sensitive and selective electrochemical method was proposed for the determination of 2,4-dinitrophenol (2,4-DNP) in surface water samples, using hydrophilic molecular imprinted polymers (MIPs) as the recognition element and nickel (Ni) fiber as the catalytic element. Hydrophilic MIPs were synthesized using 2,4-DNP as the template, acrylamide as the monomer, glycidilmethacrylate as the pro-hydrophilic co-monomer and acetonitrile as the solvent. Hydrophilic modification could enhance the accessibility of 2,4-DNP to the imprinted cavities and improve the selective recognition properties of traditional MIPs in water medium. Subsequently, hydrophilic MIPs/Ni fiber electrode was prepared to determine trace 2,4-DNP by cyclic voltammetry. The parameters affecting the analytical performance were investigated. Under optimized conditions, the linear range was 0.7-30 μg L⁻¹ and the detection limit was 0.1 μg L⁻¹. Finally, the proposed method was applied to measure 2,4-DNP in surface water samples. The spiked recoveries were changed from 91.3% to 102.6% and the RSD was not higher than 5.1%. There was no statistically significant difference between the results obtained by the proposed method and the traditional chromatographic method.
authors.affiliation: MOE Key Laboratory of Environment & Health, Institute of Environmental Medicine, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, #13 Hangkong Road, Wuhan, Hubei 430030, People's Republic of China.
authors.forename: Tao
authors.initials: T
authors.lastname: Jing
authors.forename: Huan
authors.initials: H
authors.lastname: Xia
authors.forename: Jiwei
authors.initials: J
authors.lastname: Niu
authors.forename: Yusun
authors.initials: Y
authors.lastname: Zhou
authors.forename: Qing
authors.initials: Q
authors.lastname: Dai
authors.forename: Qiaolin
authors.initials: Q
authors.lastname: Hao
authors.forename: Yikai
authors.initials: Y
authors.lastname: Zhou
authors.forename: Surong
authors.initials: S
authors.lastname: Mei
mesh_terms: D019297:2,4-Dinitrophenol / Q000032:analysis*; D015374:Biosensing Techniques / Q000379:methods* / Q000706:statistics & numerical data; D055664:Electrochemical Techniques; D004566:Electrodes; D057927:Hydrophobic and Hydrophilic Interactions; D057230:Limit of Detection; D054802:Molecular Imprinting; D009532:Nickel; D011108:Polymers; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D011108:Polymers; D014874:Water Pollutants, Chemical; D009532:Nickel; D019297:2,4-Dinitrophenol