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Abstract: Abstract: In this work, we report the obtaining of an ecological imprinted polymer for the selective sorption of xanthine derivatives (caffeine and theobromine) from aqueous solutions, through an innovative approach. Poly (vinyl alcohol) [PVA]-xanthine films have been obtained by aqueous solution casting. PVA crosslinking has been performed by using glutaraldehyde in gaseous phase. Template elimination has been achieved by “washing” of crosslinked films with water. To check the polymer imprentation and to determine the imprinted material effectiveness in xanthines separation, sorption studies have been performed. Freundlich, Langmuir, BET, Extended Langmuir models, and Scatchard analysis have been applied on the experimental data to better characterize the sorption mechanism. Fluorescence microscopy has been proposed as suitable method to check the imprentation level of the polymer. The information obtained by this method is in good agreement with the values for the efficiency of the imprinted polymer and could serve as an easier tool for prediction of the imprinted polymers performance. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci 122:2081-2089, 2011
Template and target information: xanthine derivatives, caffeine, theobromine
Author keywords: molecular imprinting, fluorescence microscopy, poly (vinyl alcohol), sorption, xanthine derivatives, separation