Separation of Total Isoflavones from Pueraria Lobata by Aqueous Ethanol Microwave-Assited Extraction

The self-designed and manufactured extraction device was used to carry out the single factor experiment for leaching of total isoflavones from pueraria lobata by microwave-assisted extraction under normal pressure.The obtained optimum technical conditions were: microwave power 700W,solution radiated to be boiled,radiation for one time,alcohol concentration 50(wet.)%,ratio of solid to liquid 1:10,immersed time in advance 1 h and particle size 60 eyes,under witch the extraction rate reached about 80%.