Extraction of natural products from bark of <Emphasis Type="Italic">Betula pendula</Emphasis> using ionic liquids期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

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Extraction of natural products from bark of <Emphasis Type="Italic">Betula pendula</Emphasis> using ionic liquids

Authors:	Nadine Strehmel David Strunk Veronika Strehmel

Institution:	1.Leibniz Institute of Plant Biochemistry,Halle (Saale),Germany;2.Governmental Institute of Legal Medicine and Forensic Sciences,Berlin,Germany;3.Niederrhein University of Applied Sciences, Organic Chemistry and Institute for Coatings and Surface Chemistry,Krefeld,Germany

Abstract:	Introduction Aqueous–methanol mixtures have successfully been applied to extract a broad range of metabolites from plant tissue. However, a certain amount of material remains insoluble. Objectives To enlarge the metabolic compendium, two ionic liquids were selected to extract the methanol insoluble part of trunk from Betula pendula. Methods The extracted compounds were analyzed by LC/MS and GC/MS. Results The results show that 1-butyl-3-methylimidazolium acetate (IL-Ac) predominantly resulted in fatty acids, whereas 1-ethyl-3-methylimidazolium tosylate (IL-Tos) mostly yielded phenolic structures. Interestingly, bark yielded more ionic liquid soluble metabolites compared to interior wood. Conclusion From this one can conclude that the application of ionic liquids may expand the metabolic snapshot.

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