PURPOSE: To provide a method for separating a compound of flavone skeleton having a glycoside structure from a compound of flavone skeleton not having a glycoside structure, to be concrete, a method for separating the compound of flavone skeleton having a glycoside structure from the compound of flavone skeleton not having a glycoside structure by using a polyvinyl alcohol membrane.
CONSTITUTION: The method for separating active ingredients contained in a crude medicine, to be concrete, a compound of flavone skeleton having a glycoside structure such as baicalin from a compound of flavone skeleton not having a glycoside structure such as baicalein, flavone, flavonol, 7,8- dihydroxyflavone by using a polyvinyl alcohol membrane prepared from an aqueous solution comprising 4-8wt.% of polyvinyl alcohol, 1-2wt.% of acetamide and 90-95wt.% of water, especially preferably 4wt.% of polyvinyl alcohol, 1wt.% of acetamide and 95wt.% of water is provided.
INOUE KATSUTOSHI
KITAZAKI HIRONORI
ISHIMARU YORIYUKI
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