Method for extracting, fractionating and purifying polyphenol compounds orginating from fresh vegetables culls using a high-absorption and -elution resin

摘要

A method for extracting, fractionating and purifying polyphenolic compounds originating from leafy edible plants of the Compositae family or bulb plants of Liliaceae family, or from sorting deviations of fresh plants, comprising the following steps of: a) extracting the polyphenolic compounds in order to obtain a plant material extract; b) adsorbing on an adsorbing resin the polyphenolic compounds contained in the raw extract, c) eluting the polyphenolic compounds retained on the resin in order to obtain a purified extract, and d) concentrating, optionally followed by drying, the purified extract in order to obtain a product comprising polyphenolic compounds. The resin is styrene-divinyl benzene resin having the following physical features: 1) pores with an average size in the range from 50 to 110 angstroms; 2) a surface area equal to or higher than 800m2/g, 3) a pore volume higher than 1ml/g.