Medicinal Plant

2012, v.3(06) 58-60+63

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Process Research on the Reflux Extraction of Flavonoids from Rubus crataegifolius Leaves
Process Research on the Reflux Extraction of Flavonoids from Rubus crataegifolius Leaves

摘要(Abstract):

[Objective] To study the optimum extraction condition of flavonoids from Rubus crataegifolius leaves by using reflux extraction method.[Method] Taking ethanol as the solvent,effects of ethanol concentration,solid-liquid ratio,extraction temperature,and extraction time on the extraction rate of flavonoids were studied.Based on the results of single factor test,orthogonal test was designed and the optimal technology condition was selected.[Result] Factors affecting the extraction rate of flavonoids were in the order of solid-liquid ratio > ethanol concentration > extraction temperature > extraction time.The optimal extraction condition was as follows:70% ethanol,1:20(g/ml)solid-liquid ratio,85 ℃ extraction temperature and 1.5 h extraction time.Under this condition,the extraction rate of flavonoids was 9.51%.[Conclusion] Reflux extraction of flavonoids from R.crataegifolius leaves was simple and had relatively high extraction rate.

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基金项目(Foundation): Supported by the Ph. D. Programs Foundation of Hebei United University

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