Comparative Study on the Extraction Processes of Total Flavonoids from LianXing JiDou

Objective: To compare the effects of four kinds of processes on the extraction of total flavonoids from LianXing JiDou(Oxytropis falcata Bunge). Methods: The contents of total flavonoids from LianXing JiDou were detected by NaNO2-Al(NO3) 3 chromatometry, the yield and the purity of total flavonoids were taken as the indexes, total flavonoids were extracted with the processes including water-extraction alcohol-precipitation and acid-hydrolysis, water-extraction, alkaline-extraction and acid-precipitation, water-extraction and acid-hydrolysis. Results: The best extraction process for LianXing JiDou was water-extraction and acid- hydrolysis. The extraction percentage and the purity of total flavonoids were 1.6% and 11.26% respectively. Conclusion: The process could be used to extract total flavonoids from LianXing JiDou, which is reliable, simple and practicable.