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J Sci Food Agric

Title:		Volatile components of several virgin and refined oils differing in their botanical origin
Author(s):		Uriarte PS; Goicoechea E; Guillen MD;
Address:		"Food Technology, Lascaray Research Hub, Faculty of Pharmacy, University of the Basque Country (UPV/EHU), Paseo de la Universidad N degrees 7, E-01006 Vitoria, Spain"
Journal Title:		J Sci Food Agric
Year:		2011
Volume:		20110407
Issue:		10
Page Number:		1871 - 1884
DOI:		10.1002/jsfa.4400
ISSN/ISBN:		1097-0010 (Electronic) 0022-5142 (Linking)
Abstract:		"BACKGROUND: The volatile components of virgin and refined oils whose compositions were very different in terms of oleic, linoleic and linolenic acyl groups were studied by solid phase microextraction (SPME) followed by gas chromatography/mass spectrometry (GC/MS), and their composition of acyl groups was determined by proton nuclear magnetic resonance (1) H NMR. The virgin oils studied were olive, linseed and walnut oils, while the refined oils were sunflower and rapeseed oils. RESULTS: Large differences were found among the headspace compositions of the virgin oils. These were due in part to compounds that could be considered as markers of different vegetable origins and manufacturing processes, but also to compounds resulting from degradative oxidation of the main acyl group components. By virtue of their being refined, fewer components were present in the refined oils, although differences in their headspaces were found owing to the presence of compounds resulting from oxidation of the determined acyl groups. CONCLUSION: The studied oils show specific characteristics regarding not only their main components, which are well known, but also their volatile components. The latter provide information on some of the processes to which oils have been submitted, on their oxidation level, on their botanical origin and on the compounds responsible for their odour"
Keywords:		Acylation Fatty Acids/*metabolism Fruit Gas Chromatography-Mass Spectrometry Lipid Peroxidation Magnetic Resonance Spectroscopy Magnoliopsida/*chemistry Plant Extracts/*chemistry Plant Oils/*chemistry Seeds Volatile Organic Compounds/*analysis;
Notes:		"MedlineUriarte, Patricia S Goicoechea, Encarnacion Guillen, Maria D eng Research Support, Non-U.S. Gov't England 2011/04/12 J Sci Food Agric. 2011 Aug 15; 91(10):1871-84. doi: 10.1002/jsfa.4400. Epub 2011 Apr 7"