Ionic liquids based microwave-assisted extraction of lichen compounds with quantitative spectrophotodensitometry analysis

被引：32
作者：
Bonny, Sarah [1 ]
Paquin, Ludovic [2 ]
Carrie, Daniel [2 ]
Boustie, Joel [1 ]
Tomasi, Sophie [1 ]
机构：
[1] Univ Europeenne Bretagne, Univ Rennes 1, Equipe PNSCM Prod Nat Synth Chim Med, UMR CNRS Sci Chim Rennes 6226,UFR Sci Pharmaceut, F-35043 Rennes, France
[2] Univ Europeenne Bretagne, Univ Rennes 1, Equipe ICMV Ingn Chim & Mol Vivant, UMR CNRS 6226, F-35042 Rennes, France
来源：
ANALYTICA CHIMICA ACTA | 2011年 / 707卷 / 01期
关键词：
Pertusaria pseudocorallina; Lichens. Polyphenolic compounds; Ionic liquids; Microwave-assisted extraction (MAE); Heat-extraction (HE); AMINO-ACIDS; METABOLITES; TOXICITY; SALTS;
D O I：
10.1016/j.aca.2011.09.009
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
Ionic liquids based extraction method has been applied to the effective extraction of norstictic acid, a common depsidone isolated from Pertusaria pseudocorallina, a crustose lichen. Five 1-alkyl-3-methylimidazolium ionic liquids (ILs) differing in composition of alkyl chain and anion were investigated for extraction efficiency. The extraction amount of norstictic acid was determined after recovery on HPTLC with a spectrophotodensitometer. The proposed approaches (IL-MAE and IL-heat extraction (IL-HE)) have been evaluated in comparison with usual solvents such as tetrahydrofuran in heat-reflux extraction and microwave-assisted extraction (MAE). The results indicated that both the characteristics of the alkyl chain and anion influenced the extraction of polyphenolic compounds. The sulfate-based ILs [C(1)mim][MSO4] and [C(2)mim][ESO4] presented the best extraction efficiency of norstictic acid. The reduction of the extraction times between HE and MAE (2 h-5 min) and a non-negligible ratio of norstictic acid in total extract (28%) supports the suitability of the proposed method. This approach was successfully applied to obtain additional compounds from other crustose lichens (Pertusaria amara and Ochrolechia parella). (C) 2011 Elsevier B.V. All rights reserved.
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收藏
页码：69 / 75
页数：7
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