香椿叶粗粉以丙酮 -水 (1:1)冷浸 ,减压回收丙酮 ,水液以乙酸乙酯萃取 ,萃取液经无水硫酸钠脱水后 ,滴加氯仿至无沉淀析出。过滤得沉淀即为香椿多酚的粗品。通过薄层研究发现香椿多酚中含黄酮类甙和甙元、没食子酸、没食子儿茶素缩合鞣质、没食子鞣质、单体原花青素等成分。 The citron leaf meal was cold-immersed with acetone-water (1:1), acetone was decompressed, and the aqueous solution was extracted with ethyl acetate. The extract was dehydrated over anhydrous sodium sulfate, and chloroform was added dropwise until no precipitation occurred. The precipitate was filtered to obtain the crude product of camphor polyphenols. The thin layer study found that the camphor polyphenols contained flavonoids such as alum and aglycone, gallic acid, gallocerin-condensed tannins, galloquinone, and monomeric procyanidins.