Purification of polyphenols from walnut peel by macroporous resin adsorption

A method for separation and purification of polyphenols from Walnut peel with macroporous resins.The results as follows:five kinds of macroporous resins were selected,AB-8resin was considered as suitable material to purify and separate the Walnut peel polyphenols.The optimum conditions were concentration of feed 3.0mg/mL at pH 4.0,and the volume of polyphenols sample 100 mL,flowing rate 2.0mL/min,elute ethanol concentration 30%,ethanol at pH 6.0,elute volume 250 mL,elution rate 2.0mL/min.After eluted with AB-8resin,the polyphenols purity reach 36.36%,which is approximately 4.8times higher than the previous7.65%.