Ion internal energy distributions validate the charge residue model for small molecule ion formation by spray methods

Author(s) Touboul, David, Jecklin, Matthias Conradin, Zenobi, Renato
Publication Type Journal Items, Publication Status: Published
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Title Ion internal energy distributions validate the charge residue model for small molecule ion formation by spray methods
Author(s) Touboul, David
Zenobi, Renato
Journal or Series Title Rapid communications in mass spectrometry
Volume Number 22
Issue Number 7
Start Page 1062
End Page 1068
ISSN 0951-4198
1097-0231
Publisher Wiley
Publication Place London
Publication Date 2008
Abstract This paper reports a detailed study of the internal energy distribution of ions formed by four electrospray ionization (ESI)-related ionization methods, with particular emphasis on electrosonic spray ionization (ESSI). Substituted benzylpyridinium ions were used as thermometer ions to probe the internal energy distribution. The influence of different instrumental parameters was studied. Cone and skimmer voltages as well as the collision energy were found to strongly affect the ion internal energy distribution, whereas the distance between the emitter and the inlet of the mass spectrometer, the nebulizing gas pressure or the flow rate showed no influence. The internal energy distribution obtained with an ESSI source was compared with those obtained for electrospray (ESI), nanoelectrospray (nanoESI) and sonic spray ionization (SSI) on the same mass spectrometer with the same instrumental parameters. No clear differences were observed. As the charge residue model is the only ion formation mechanism possible for SSI, we conclude that benzylpyridinium ions are formed by the pathway suggested by this model.
DOI 10.1002/rcm.3469
Additional Notes Received 12 November 2007, Revised 28 January 2008, Accepted 28 January 2008, Published Online 10 March 2008
Document Type Article
Publication Status Published
Language English
Assigned Organisational Unit(s) 03430
Organisational Unit(s)
NEBIS System Number 000038989
Source Database ID PP-40958
WOS-000254759600022
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@article{Tbl2008,
author = "Touboul, David and Jecklin, Matthias Conradin and Zenobi, Renato",
title = "{I}on internal energy distributions validate the charge residue model for small molecule ion formation by spray methods",
journal = "Rapid communications in mass spectrometry",
year = 2008,
volume = "22",
number = "7",
pages = "1062--1068",
}


E-Citations record created: Thu, 01 Apr 2010, 22:43:50 CET