Abstract: Highly selective gallic acid imprinted polymers were synthesized by a suspension polymerization technique. Poly (hydroxyethyl methacrylate- co -ethyleneglycol dimethacrylate) and poly (dimethoxystyrene- co -divinylbenzene) beads were studied for gallic acid separation from green tea leaves. Isothermal binding was explained using Langmuir and Freundlich models. Recovery of gallic acid molecules was significantly improved up to 83 % when water was used as extraction solvent. Competitive adsorption, from a green tea leaves alcoholic extract, revealed higher affinities of imprinted polymers for gallic acid. An 18.8 selectivity coefficient was obtained for poly (hydroxyethyl methacrylate- co -ethyleneglycol dimethacrylate) imprinted beads. The performances of the imprinted polymers were in agreement with morphology and nitrogen adsorption analyses
Template and target information: gallic acid
Author keywords: molecularly imprinting, suspension polymerization, Gallic acid, Recognition, selectivity, Green tea extraction

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