Title: Study on the Extraction of Flavonoids from Paulownia Tomentosa Steud Flowers by Microwave Method
Abstract: Extraction of flavonoids from Paulownia Tomentosa Steud flowers by microwave technology was studied.The effect of ethanol concentration,the ratio of materials weight to solvent volume,microwave treating time and microwave power on the extraction yield of flavonoids was studied.The single factor experiment results showed that the best operational conditions were as follows:the ratio of materials weight to solvent volume 1∶15,microwave power 500 W,microwave treating time 150 seconds and 70% ethanol.Under these conditions the yield of flavonoids was 7.71%.The orthogonal experiment results indicated that the influence factor was ethanol concentration,microwave power,the ratio of materials weight to solvent volume and microwave treating time in sequence.The best operational condition was A_2B_3C_2D_3,namely the ratio of materials weight to solvent volume 1∶20,microwave power 700 W,microwave treating time 150 seconds and 70% ethanol.
Publication Year: 2009
Publication Date: 2009-01-01
Language: en
Type: article
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