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

Molecules

Ying Zhou¹  Datong Wu²  Pengfei Cai²  Guifang Cheng¹  Chaobiao Huang¹  Yuanjiang Pan² 

[1] College of Chemistry and Life Science, Zhejiang Normal University, Jinhua 321004, Zhejiang, China; E-Mails:;Department of Chemistry, Zhejiang University, Hangzhou 310027, Zhejiang, China; E-Mails:

关键词: ionic liquids;    flavonoid glycosides;    microwave-assisted extraction;    Chrysanthemum morifolium Ramat;   

DOI  :  10.3390/molecules20057683

来源: mdpi

【 摘 要 】

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, [C_nmim]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.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.