Optimization of extraction of polyphenols from chestnut shell by response surface methodology

Abstract

Abstract Chestnut shell is one of the main by-products in the chestnut processing, which contains abundant polyphenols, so it can be used as a source of polyphenols. In this study, using ethanol as the extraction solvent, the optimum extraction conditions of polyphenols from chestnut shell were determined by single factor experiment and response surface experiment: liquid-solid ratio of 39:1, extraction temperature of 74°C, extraction time of 91 min, ethanol concentration of 65%. Under these conditions, the extraction rate (ER) of polyphenols from chestnut shell was 6.09%. The results can assist in better exploitation of chestnut shell, which can not only reduce resource waste and environmental pollution, but also obtain economic benefits.