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Int. J. Mol. Sci. 2012, 13(7), 8775-8788; doi:10.3390/ijms13078775
Article

Microwave-Assisted Method for Simultaneous Extraction and Hydrolysis for Determination of Flavonol Glycosides in Ginkgo Foliage Using Brönsted Acidic Ionic-Liquid [HO3S(CH2)4mim]HSO4 Aqueous Solutions

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State Engineering Laboratory for Bio-Resource Eco-Utilization, Northeast Forestry University, Harbin 150040, China These authors contributed equally to this work.
* Authors to whom correspondence should be addressed.
Received: 23 April 2012 / Revised: 5 July 2012 / Accepted: 6 July 2012 / Published: 16 July 2012
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Abstract

The Brönsted acidic ionic-liquid [HO3S(CH2)4mim] HSO4, a novel dual catalyst–solvent, has been successfully applied in simultaneous microwave-assisted extraction and hydrolysis for the determination of flavonol glycosides in Ginkgo foliage. The parameters, namely the [HO3S(CH2)4mim]HSO4 concentration, microwave-irradiation power, microwave-irradiation time, and solid–liquid ratio, were optimized. The optimum conditions were: an amount of 1.5 M [HO3S(CH2)4mim]HSO4, a microwave-irradiation power of 120 W, an irradiation time of 15 min, and a solid–liquid ratio of 1:30 g/mL. Compared with traditional methods the proposed approach demonstrates higher efficiency in a shorter operating time, and is an efficient, rapid, and simple sample preparation method.
Keywords: Ginkgo biloba; ionic liquid; [HO3S(CH2)4mim]HSO4; microwave-assisted extraction; hydrolysis; flavonol glycoside Ginkgo biloba; ionic liquid; [HO3S(CH2)4mim]HSO4; microwave-assisted extraction; hydrolysis; flavonol glycoside
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

Yao, H.; Du, X.; Yang, L.; Wang, W.; Yang, F.; Zhao, C.; Meng, X.; Zhang, L.; Zu, Y. Microwave-Assisted Method for Simultaneous Extraction and Hydrolysis for Determination of Flavonol Glycosides in Ginkgo Foliage Using Brönsted Acidic Ionic-Liquid [HO3S(CH2)4mim]HSO4 Aqueous Solutions. Int. J. Mol. Sci. 2012, 13, 8775-8788.

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