Wang et al. Microwave-assisted extraction of flavonoids from Chinese herb Radix Puerariae (Ge Gen). J. Med. Plants Res.

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Vol. 4 No. 4

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Journal of Medicinal Plants Research Vol. 4(4), pp. 304–308, 18 February 2010

Full Length Research Paper

Microwave-assisted extraction of flavonoids from Chinese herb Radix Puerariae (Ge Gen)

Yan-ling Wang¹*, Guang-Sheng Xi¹, Yong-Chun Zheng¹and Fu-Sheng Miao²

¹Department of Chinese Medicine, Jilin Agricultural Science and Technology College, Jilin, Jilin Province, 132101, People’s Republic of China.

²Physical Education College, Liaoning Normal University, Dalian, Liaoning Province, 116029, People’s Republic of China.

*Corresponding author. E-mail: ylwxgs@yahoo.cn. Tel: +86- 0432-3509060. Fax: +86- 0432-3509711.

Accepted 27 January, 2010

Abstract

Microwave-assisted extraction (MAE) technique was developed for the extraction of ﬂavonoids from Radix Puerariae (FRP). Several inﬂuential parameters of the MAE procedure (ethanol concentration, solvent volume, microwave power and extraction time) were studied through single factor experiments and orthogonal experiment for the optimization of the extraction protocol. The optimal conditions of MAE were: ethanol concentration 70%, solvent volume 35 ml microwave power 255W and extraction time 6.5 min, while extraction yield of FRP was 8.37 mg/g. The developed MAE method provided a good alternative for the extraction of ﬂavonoids from R. Puerariae.

Key words: Microwave-assisted extraction (MAE), flavonoids, Radix Puerariae.

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