Optimization of Extraction Process of Geniposide by Orthogonal Design

[Objective] To optimize the extraction process of geniposide from Gardenia jasminoides.[Method]Solid-liquid ratio,extraction temperature and extraction duration were taken as investigation objects,and the extraction rate of geniposide as index.The optimum extraction process was obtained through orthogonal design on the basis of single factor test.[Result]The optimal extraction conditions of geniposide were as follows: 60% alcohol as extractant,solid-liquid ratio of 1∶4,extraction temperature of 75 ℃,extraction duration of 3 h.Under the above conditions,the extraction rate of geniposide reached as high as12.59%.[Conclusion] The efficiency and stability of geniposide could be improved by suitable extraction conditions