The Extraction Technology for Total Flavone from Rubus Suavissimus S.Lee Leaves

[Objective] To study an extraction technology for total flavone from 1eaves of Rubus Suavissimus S.Lee.[Method] the contents and extraction rate were considered as the observed index,the orthogonal design method was used in studying the process condition.[Results]The primary and secondery influence orders of the extraction were as follows:first was the concentration of ethanol,second,the dosage of ethanol,third,extraction times and forth,the extracting minutes.The optimum process of the extraction technology which obtained through onefactor experiment and orthogonal design was: 70% ethanol,twenty-fold solvent,three times extraction and 120 minutes each time.[Conclusion] The optimized method is stable and efficient.