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Titolo:
Kinetics of solvent addition on electrosprayed ions in an electrospray source and in a quadrupole ion trap
Autore:
Gabelica, V; Lemaire, D; Laprevote, O; De Pauw, E;
Indirizzi:
Univ Liege, Dept Chim, Lab Spectrometrie Masse, B-4000 Liege, Belgium UnivLiege Liege Belgium B-4000 ectrometrie Masse, B-4000 Liege, Belgium CNRS, Inst Chim Subst Nat, F-91198 Gif Sur Yvette, France CNRS Gif Sur Yvette France F-91198 t Nat, F-91198 Gif Sur Yvette, France
Titolo Testata:
INTERNATIONAL JOURNAL OF MASS SPECTROMETRY
fascicolo: 1-3, volume: 210, anno: 2001,
pagine: 113 - 119
SICI:
1387-3806(20011001)210:1-3<113:KOSAOE>2.0.ZU;2-4
Fonte:
ISI
Lingua:
ENG
Soggetto:
INTERNAL ENERGY-DISTRIBUTION; POLAR MOLECULE COLLISIONS; IONIZATION;
Keywords:
electrospray; quadruopole ion trap; ion-molecule reaction; solvent;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
16
Recensione:
Indirizzi per estratti:
Indirizzo: De Pauw, E Univ Liege, Dept Chim, Lab Spectrometrie Masse, Bat B6C, B-4000Liege, Belgium Univ Liege Bat B6C Liege Belgium B-4000 B-4000 Liege, Belgium
Citazione:
V. Gabelica et al., "Kinetics of solvent addition on electrosprayed ions in an electrospray source and in a quadrupole ion trap", INT J MASS, 210(1-3), 2001, pp. 113-119

Abstract

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. (C) 2001 Elsevier Science B.V.

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Documento generato il 01/12/20 alle ore 16:41:51