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Type: Artigo de periódico
Title: Desorption/ionization Efficiencies Of Triacylglycerols And Phospholipids Via Easi-ms
Author: Fernandes A.M.A.P.
Fernandes G.D.
Barrera-Arellano D.
De Sa G.F.
Lins R.D.
Eberlin M.N.
Alberici R.M.
Abstract: Knowledge of the major effects governing desorption/ionization efficiency is required for the development and application of ambient mass spectrometry. Although all triacylglycerols (TAG) have the same favorable protonation and cationization sites, their desorption/ionization efficiencies can vary dramatically during easy ambient sonic-spray ionization because of structural differences in the carbon chain. To quantify this somewhat surprising and drastic effect, we have performed a systematic investigation of desorption/ionization efficiencies as a function of unsaturation and length for TAG as well as for diacylglycerols, monoacylglycerols and several phospholipids (PL). Affinities for Na+ as a function of unsaturation level have also been assayed via comprehensive metadynamics calculations to understand the influence of this phenomenon on the ionization efficiency. The results suggest that dipole-dipole interactions within a carbon chain tuned by unsaturation sites govern ionization efficiency of TAG and PL. Copyright © 2014 John Wiley & Sons, Ltd.
Editor: John Wiley and Sons Ltd
Citation: Journal Of Mass Spectrometry. John Wiley And Sons Ltd, v. 49, n. 5, p. 335 - 341, 2014.
Rights: fechado
Identifier DOI: 10.1002/jms.3366
Date Issue: 2014
Appears in Collections:Unicamp - Artigos e Outros Documentos

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