Journal
JOURNAL OF CHEMISTRY
Volume 2013, Issue -, Pages -Publisher
HINDAWI LTD
DOI: 10.1155/2013/541037
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Funding
- Special Fund for Forestry Scientific Research in the Public Interest [201304601]
- National Natural Science Foundation of China [NSFC31170575]
- Natural Science Foundation of Heilongjiang Province of China [C201114]
- Ministry of Education of China [DL12DA03]
- Natural Science Foundation of Liaoning Province of China [201202080]
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As ionic liquid-based ultrasonic-assisted extraction method has been developed for the effective extraction of procyanidins from Larix gmelinii bark. So as to evaluate the performance of ionic liquids in ultrasonic-assisted extraction process, the effects caused by changes in the anion and the alkyl chain length of the cation on the extraction efficiency were investigated in this paper. The results indicated that the characteristics of anions had remarkable effects on the extraction efficiency of procyanidins, and 1-butyl-3-methylimidazolium bromide ([Bmim]Br) aqueous solution was the best among the investigated ionic liquids. The optimum conditions for the extraction were as follows: [Bmim]Br concentration 1.25 M, soak time 3 h, solid-liquid ratio 1 : 10, ultrasonic power 150 W, and ultrasonic time 30 min. This work not only introduces a simple, green, and highly efficient sample preparation method for extraction of procyanidins from L. gmelinii bark, but also reveals the tremendous application potential of ionic liquids.
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