Please use this identifier to cite or link to this item:
http://hdl.handle.net/10773/9003
Title: | Formation of oligomeric alkenylperoxides during the oxidation of unsaturated fatty acids: an electrospray ionization tandem mass spectrometry study |
Author: | Villaverde, Juan José Santos, Sónia A. O. Maciel, Elisabete Simões, Mário M. Q. Pascoal Neto, Carlos Domingues, M. Rosário M. Silvestre, Armando J. D. |
Keywords: | Fenton’s and Fe2+/O2 systems Unsaturated fatty acids Oligomeric alkenylperoxides Oxidation Mass spectrometry |
Issue Date: | 2012 |
Publisher: | John Wiley and Sons |
Abstract: | This study reports the identification of oligomeric alkenylperoxides by electrospray ionization mass spectrometry (ESI-MS) and tandem mass spectrometry (ESI-MS2), during the oxidation of oleic, linoleic and linolenic acids with Fenton's (Fe2+/H2O2) and Fe2+/O2 systems. The reactions were followed by ferrous oxidation-xylenol orange method together with GC-MS and GC-FID, allowing to observe that both oxidation systems are different in terms of hydroperoxide evolution, probably due to the presence of different intermediate reactive species: perferryl ion and OH radical responsible for the decomposition of lipid hydroperoxides and formation of new compounds. The analysis of ESI-MS in the negative mode, obtained after oxidation of each fatty acid, confirmed the presence of the monomeric oxidation products together with other compounds at high mass region above m/z 550. These new ions were attributed to oligomeric structures, identified by the fragmentation pathways observed in the tandem mass spectra. Copyright (C) 2012 John Wiley & Sons, Ltd. |
Peer review: | yes |
URI: | http://hdl.handle.net/10773/9003 |
DOI: | 10.1002/jms.2047 |
ISSN: | 1076-5174 |
Appears in Collections: | CICECO - Artigos |
Files in This Item:
File | Description | Size | Format | |
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J.Mass.Spectrom.2012 47 163_172.pdf | 450.67 kB | Adobe PDF |
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