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Reference type: Journal
Authors: Gómez-Caballero A, Unceta N, Aranzazu Goicolea M, Barrio RJ
Article Title: Evaluation of the selective detection of 4,6-dinitro-o-cresol by a molecularly imprinted polymer based microsensor electrosynthesized in a semiorganic media.
Publication date: 2008
Journal: Sensors and Actuators B: Chemical
Volume: 130
Issue: (2)
Page numbers: 713-722.
DOI: 10.1016/j.snb.2007.10.036
Alternative URL: http://www.sciencedirect.com/science/article/pii/S0925400507008647

Abstract: A carbon fiber microelectrode (CFME) was coated with a polymeric film, in order to synthesize an MIP based voltammetric microsensor for the selective determination of DNOC. The polymeric synthesis was carried out by electrocopolymerization of aniline and o-phenylenediamine (o-PD) in a water:methanol (1:1) media. The response of the MIP-sensor synthesized to the target analyte, was linear in a range from 8 x 10-7 to 10-4 M with a sensitivity of 1.6 x 103 nA M-1 and good stability and repeatability (<14%). Different rebinding experiments were carried out in order to evaluate the binding properties of the MIP-sensor. The experimental adsorption isotherms were fitted to Langmuir, Bi-Langmuir and Freundlich-Langmuir isotherms and the Langmuir model was chosen as the best fitting model. Under the optimized experimental conditions, the voltammetric microsensor was able to differentiate between DNOC and other closely related compounds such as other dinitrophenolic pesticides like binapacryl or dinobuton
Author keywords: Dinitrophenol pesticides, Voltammetric microsensor, Molecularly imprinted polymers, electropolymerization

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