Article (Scientific journals)
Kinetics of solvent addition on electrosprayed ions in an electrospray source and in a quadrupole ion trap
Gabelica, Valérie; Lemaire, David; Laprévote, Olivier et al.
2001In International Journal of Mass Spectrometry, 210/211, p. 113-119
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Keywords :
benzylpyridinium; thermometer molecule; ion-molecule reaction; mass spectrometry; internal energy
Abstract :
[en] Benzylpyridinium cations readily fragment in the electrospray source by loss of pyridine to give benzyl cations (M-79). The full-scan spectra obtained with some instruments also show, in addition, an m/z (M-38) peak corresponding to the addition of acetonitrile, being present in the solvent mixture, on the benzyl cations. Here we report that the addition reaction can occur in the source region of electrospray mass spectrometry instruments, and in a quadrupole ion trap. The kinetics of acetonitrile addition was monitored in an ion trap, acetonitrile being provided by leakage from the source, through the heated capillary. For benzyl ions with different substituents, the addition kinetics has been found positively correlated with the Brown parameter sigma+ of the benzyl radical, and therefore with the effective charge density on the alpha-carbon atom of the benzyl ion. This is consistent with the Langevin or average-dipole-orientation (ADO) theory of ion–molecule reaction kinetics.
Research center :
CART - Centre Interfacultaire d'Analyse des Résidus en Traces - ULiège
Disciplines :
Chemistry
Physics
Author, co-author :
Gabelica, Valérie ;  Université de Liège - ULiège > Département de chimie (sciences) > Chimie physique, spectrométrie de masse
Lemaire, David;  Institut de Chimie des Substances Naturelles–CNRS, 91198 Gif sur Yvette, France
Laprévote, Olivier;  Institut de Chimie des Substances Naturelles–CNRS, 91198 Gif sur Yvette, France
De Pauw, Edwin  ;  Université de Liège - ULiège > Département de chimie (sciences) > Chimie physique, spectrométrie de masse
Language :
English
Title :
Kinetics of solvent addition on electrosprayed ions in an electrospray source and in a quadrupole ion trap
Publication date :
2001
Journal title :
International Journal of Mass Spectrometry
ISSN :
1387-3806
Publisher :
Elsevier Science, Amsterdam, Netherlands
Volume :
210/211
Pages :
113-119
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
F.R.S.-FNRS - Fonds de la Recherche Scientifique [BE]
Commentary :
This is a postprint version of an article published in Int J Mass Spectrom © 2001 Elsevier Science B.V.
Available on ORBi :
since 21 July 2008

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