Research on the extraction of polyphenols from chestnut

The effects of Folin volume, the ration of Folin and 10% Na2CO3, operation time on determining the polyphenols content and the alcohol concentration, extraction time, the ratio of raw materials and solution, temperature and extraction period on extracting the polyphenols from the chestnut were investigated. The best conditions for polyphenol determination were 0.5 mL Folin, 1.5 mL 10% Na2CO3 and operation at 20~25 ℃. The best technical conditions for chestnut polyphenol extraction were obtained through orthogonal experiments as follows: ratio of raw material and solution of 1∶10, temperature at 35 ℃, 50% alcohol and extraction time of 25 min. Under the optimized condition, the extraction amount of polyphenols from chestnut was 2.45%.