期刊
JOURNAL OF CHROMATOGRAPHY A
卷 1628, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.chroma.2020.461446
关键词
Imidazolium ionic liquids; Physicochemical property; Extraction; Flavonoids; Selectivity
资金
- High-level Innovative Talents Training Project of Guizhou Province [QKHPTRC [2016] 5658]
Ionic liquids, as tuneable, highly soluble, non-flammable, non-volatile and reusable extractants, have attracted extensive attention in the extraction of flavonoids from plants. In the present work, novel dualchain imidazolium-derived ionic liquids were synthesized by a simple and efficient method and characterized (NMR spectroscopy, thermal stability, viscosity, conductivity, and polarity). Then, the imidazolium ionic liquids with different cation were used in the microwave-assisted extraction of flavonoids from Pinus massoniana Lamb. The results showed that the ionic liquid [Bmbim]Br, with a relatively low viscosity, conductivity and pi* as well as a relatively large beta, offered the best extraction efficiency and selectivity for flavonoids. Subsequently, the parameters of the extraction procedure for flavonoids were optimized as follows: extraction temperature of 80 degrees C, extraction time of 60 min, microwave power of 300 W, solid-liquid ratio of 1:20, and [Bmbim]Br solution concentration of 1.0 mol/L. The extraction yield of total flavonoids was 41.07 mg/g. Finally, a recovery method of the ionic liquid had been demonstrated, and the recovery rate of ionic liquid was 73.14%. (C) 2020 Elsevier B.V. All rights reserved.
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