STUDY ON THE EXTRACTION CONDITIONS AND ANTIOXIDITION OF POLYPHENOL FROM CHESTNUT-SHELLS

The effects of extraction reagent type, concentration, ratio of solid to liquid, extraction time and extraction temperature on extraction of the chestnut shell polyphenol were studied in this experiment, and the oxidation of chestnut shell polyphenol was also studied with DPPH radical system. The results showed that the best extraction condition were solid-liquid ratio1∶23 with 30 % ethanol, shaking for 170 min in the water bath at 70 ℃. The percent of production of chestnut shell polyphenol was 7.9 % and its extraction rate was 63.125 %. The clearance rate of chestnut shell polyphenol was 91.49 % to DPPH solution when the concentration of polyphenol extract was 0.005 mg/mL.