Purification of Isoflavone from Soybean and Processed Products

초록

Total and individual isoflavone concentrations of soybean seeds are both genetically and environmentally determined, also correlated process method. Many studies about Korean soybean were presented in our lab. In this study both the Korean and Chinese soybean were considered. The isoflavones were extracted and analyzed by HPLC to compare the content of the genistein, daidzein and their glycosides genistin, daidzin extracted from soybean. Furthermore, we investigated the isoflavone contents by the different extraction processes. The amount of daidzin extracted from Korean soybean was more than that from Chinese soybean, but more genistin was extracted from Chinese soybean. The small amount of daidzein and genistein were obtained. The processed soybeans, Chungkookjang and Doenjang from Korean soybean and Chinese soybean were also covered to compare the amount of isoflavone.