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Binding characteristics of molecularly imprinted polymers based on fungicides in hydroalcoholic media

Abstract : An iprodione-imprinted polymer was prepared by copolymerization of methacrylamide and ethylene glycol dimethacrylate using a noncovalent imprinting approach. Methacrylamide was chosen using molecular dynamics simulations. To concentrate iprodione from hydro-alcoholic solutions, batch sorption of iprodione on the imprinted polymer were conducted. The equilibrium time for iprodione sorption is 20 min, and the corresponding kinetic mechanism follows the pseudo-second order indicating a strong interaction between iprodione and the imprinted polymer. Langmuir, Freundlich, and Dubinin-Radushkevich models were used to fit the isotherm of iprodione sorption. The imprinted polymer was found to be more efficient than the nonimprinted polymer for the uptake of iprodione, as revealed by its higher adsorption energy, affinity, and capacity. Finally, a selectivity study was conducted on the imprinted and the nonimprinted polymers to sorb three fungicides. It shows that the imprinted polymer could be used as a preconcentration phase in a multiresidue analysis of fungicides in hydroalcoholic medium.
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Submitted on : Monday, March 23, 2020 - 3:55:27 PM
Last modification on : Monday, October 19, 2020 - 2:26:01 PM

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Manal Bitar, Elias Bou-Maroun, Adrien Lerbret, Naim Ouaini, Philippe Cayot. Binding characteristics of molecularly imprinted polymers based on fungicides in hydroalcoholic media. Journal of Separation Science, Wiley-VCH Verlag, 2015, 38 (20), pp.3607-3614. ⟨10.1002/jssc.201500543⟩. ⟨hal-02515789⟩

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