Please use this identifier to cite or link to this item:
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
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
DOI: 10.1002/jms.2047
ISSN: 1076-5174
Appears in Collections:CICECO - Artigos

Files in This Item:
File Description SizeFormat 
J.Mass.Spectrom.2012 47 163_172.pdf450.67 kBAdobe PDFrestrictedAccess

Formato BibTex MendeleyEndnote Degois 

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.