Mo, W.J. and Langford, M.L. and Todd, J.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.
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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'.
|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:||31 Jul 2012 14:57|
|Resource URI:||http://kar.kent.ac.uk/id/eprint/19395 (The current URI for this page, for reference purposes)|
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