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Citation: GUO Yanyan, YIN Weiping, LIU Pu, HU Ya, YAN Mengjie, SUN Xiangqian. Extraction and Separation of Isoflavonoids from Rhynchosia volubilis Lour Using Ionic Liquid[J]. Chinese Journal of Applied Chemistry, ;2011, 28(5): 537-541. doi: 10.3724/SP.J.1095.2011.00415 shu

Extraction and Separation of Isoflavonoids from Rhynchosia volubilis Lour Using Ionic Liquid

1.
School of Chemical Engineering and Pharmaceutics, Henan University of Science & Technology, Luoyang 471003

Corresponding author: YIN Weiping,
Received Date: 19 July 2010
Available Online: 5 November 2010
Fund Project: 国家"863"项目资助课题(2007AA05Z454) (2007AA05Z454)

The ionic liquids have been known as "green" or "environmentally friendly" solvents and show potentials to replace traditional solvents.A new approach was set up for the extraction and separation of isoflavonoids from the Rhynchosia volubilis Lour using the 1-butyl-3-methyl tetrafluoroborate([Bmim]BF₄) ionic liquid.Three isoflavonoids were obtained from the 70% alcohol extract of Rhynchosia volubilis.Based on the spectra analysis,their structures have been confirmed to be cajanone,3-[4'-(1"-methoxy)-propoxy]-phenyl-5,7-dihydroxy-isoflavone and Biochanin A,in which the 3-[4'-(1"-methoxy)-propoxy]-phenyl-5,7-dihydroxy-isoflavone is a novel compound.The result had shown that the[Bmim]BF₄ could extract isoflavones effectively and selectively.A protocol for determining the content of each component in the isoflavonoid was established.The overall pharmacognosical content of isoflavone was 0.73% using cajanone as the standard and its maximum absorption(270 nm) as the determination wavelength.The average recovery rate and relative standard deviation was 99.94% and 3.66%,respectively.The recycling rate of the ionic liquid was 76.7%.
- Rhynchosia volubilis Lour,
- ionic liquid,
- extraction and isolation,
- isoflavonoids compound,
- content determination
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