STUDY ON THE EXTRACTION TECHNOLOGY OF FLAVONES FROM LEAVES OF HIPPOPHE RHAMNOIDES LINN

Ethanol and water extraction technology about total flavones of Hippophe rhamnoids Linn(TFH) in leaves was screened by orthogonal experiment.The best ethanol extraction technology was determined as follows: at 70 ℃ for 2 h,1.5 h with 50 % ethanol in two ethanol extraction process.The best water extraction technology was determined as follows: circling extraction for 2 h,1.5 h with volume of water 100 mL,80 mL in two water extraction.The extraction yield of TFH is 1.258 2 % by ethanol extraction and 0.927 8 % by water extraction.