以核桃的分心木为原料,将其粉碎,采用回流法加热,用酸水解或用碱水解得到鞣质.通过乙酸乙酯萃取得到没食子酸的粗提液,进而用分光光度法测定其吸光度值,利用标准曲线得到的方程,算出没食子酸的提取率.通过分析提取过程中的主要因素,进而优选没食子酸的提取工艺,确定最适的提取条件.%By heating reflux extraction method extract tannin from walnut wood. Then separate gallic acid by ethyl acetate extraction from crude extracts, and determine the content with a spectrophotometer method, drawing standard curves and establishing the equation, calculating the extraction rate. Through the analysis of the main factors in the process of extraction, and then optimize the extraction process of gallic acid, determined the optimum extraction conditions.
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