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Molecules 2015, 20(5), 7683-7699; doi:10.3390/molecules20057683

Special Effect of Ionic Liquids on the Extraction of Flavonoid Glycosides from Chrysanthemum morifolium Ramat by Microwave Assistance

1
College of Chemistry and Life Science, Zhejiang Normal University, Jinhua 321004, Zhejiang, China
2
Department of Chemistry, Zhejiang University, Hangzhou 310027, Zhejiang, China
3
Xingzhi College, Zhejiang Normal University, Jinhua 321004, Zhejiang, China
*
Authors to whom correspondence should be addressed.
Academic Editor: Derek J. McPhee
Received: 15 December 2014 / Revised: 30 March 2015 / Accepted: 22 April 2015 / Published: 28 April 2015
(This article belongs to the Special Issue New Technologies for the Recovery of Natural Products)
View Full-Text   |   Download PDF [3229 KB, uploaded 28 April 2015]   |  

Abstract

A microwave-assisted extraction approach based on ionic liquids of different chain lengths was successfully applied to the extraction of ten flavonoid glycosides from the flowering heads of Chrysanthemum morifolium Ramat. The pretreated sample was quantified by HPLC-ESI-MSn. The main components were identified as flavonoid glycosides, including three luteolin glycosides, three apigenin glycosides, three kaempferide glycosides, and one acacetin glycoside according to the characteristics of the corresponding CID mass spectrometric patterns. Eight ionic liquids from the imidazolium family with different chain lengths, namely, 1-alkyl-3-methylimidazolium bromide, [Cnmim]Br, (n = 2–16) were studied as extraction medium in water. Results indicated that alkyl chain length had an irregular impact on the extraction efficiency. Moreover, the best extraction efficiency was achieved by 1-dodecyl-3-methylimidazolium bromide aqueous solution ([C12mim]Br). Besides the alkyl chain length of the cations, other factors influencing extraction efficiency were systematically investigated, including concentration of the IL solutions, extraction time, matrix-to-solvent ratio and irradiation power. View Full-Text
Keywords: ionic liquids; flavonoid glycosides; microwave-assisted extraction; Chrysanthemum morifolium Ramat ionic liquids; flavonoid glycosides; microwave-assisted extraction; Chrysanthemum morifolium Ramat
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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. (CC BY 4.0).

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Zhou, Y.; Wu, D.; Cai, P.; Cheng, G.; Huang, C.; Pan, Y. Special Effect of Ionic Liquids on the Extraction of Flavonoid Glycosides from Chrysanthemum morifolium Ramat by Microwave Assistance. Molecules 2015, 20, 7683-7699.

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