Investigation of ghost peaks caused by nonlinear fields in the ion-trap mass-spectrometer

Mo, Wenjun and Langford, Marian L. and Todd, John F.J. (1995) Investigation of ghost peaks caused by nonlinear fields in the ion-trap mass-spectrometer. Rapid Communications in Mass Spectrometry, 9 (2). pp. 107-113. ISSN 0951-4198. (The full text of this publication is not available from this repository)

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Abstract

Mass spectral 'ghost peaks' are generated with the ion trap by the superposition of higher order multipole fields which originate through deviations from the pure quadrupole field. In data acquisition, when the amplitude of the RF voltage is tamping though a non-linear resonance point (q*) on the Mathieu stability diagram, some ions (m(o)) are ejected by the non-linear field rather than by the quadrupole field at q(z) = 0.908 on the beta(z) = 1 boundary. The prematurely ejected ions will be seen as a peak at m(1) = (q*/0.908)m(o), which we have termed a 'ghost peak'.

Item Type: Article
Subjects: Q Science > QD Chemistry
Divisions: Faculties > Science Technology and Medical Studies > School of Physical Sciences
Depositing User: O.O. Odanye
Date Deposited: 03 Jun 2009 10:38
Last Modified: 10 Jun 2014 10:30
Resource URI: http://kar.kent.ac.uk/id/eprint/19395 (The current URI for this page, for reference purposes)
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