462798 Purification of Olive Leaf Extract Via Polycarboxyl Ester Resin
Generally, phenolic contents of natural extracts are purified by adsorption-desorption processes by polymeric adsorbents. Polymeric macroporous resins are commonly applied as purification matrices in food industry owing to their high efficiency, low pollution and procedural simplicity. This study aims to investigate the static adsorption of phenolics in olive leaf on several macroporous resins. Adsorption kinetics and thermodynamics of the resin XAD 7HP were investigated by means of static adsorption and desorption tests. At every step of the open batch procedure, the efficacy of the purification was assessed by the determination of total phenolic content and the major phenolic compound, oleuropein. Taking into account of ecological and dietary restraints, generally recognized as safe (GRAS), ethanol solution was used as solvent agent in the extraction process.
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