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Chinese Agricultural Science Bulletin ›› 2014, Vol. 30 ›› Issue (12): 300-303.doi: 10.11924/j.issn.1000-6850.2013-2273

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Study on Extract of Ursolic Acid from Paulownia tomentosa Leaves by Microwave Assisted Method

  

  • Received:2013-08-27 Revised:2013-10-20 Online:2014-04-25 Published:2014-04-25

Abstract: In order to extract ursolic acid from Paulownia tomentosa ( Thunb) stued leaves, with ursolic acid yield as index, microwave assisted technology was studied. Analysis the impact of microwave power, extraction time, ethanol concentraion and ratio of material to liquid on yield by single factor and orthogonal experiments.The results showed that optimum conditions were as follows: microwave power 350W, extraction time7min, ethanol concentraion 85% and ratio of material to liquid 1:18. Under optimum conditions , the yield was 0.748%. Microwave assisted was a suitable method for extract ursolic acid for it has shorter time and higher yield.