ISSN:
0951-4198
Keywords:
Chemistry
;
Analytical Chemistry and Spectroscopy
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Physics
Notes:
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 ramping though a non-linear resonance point (q*) on the Mathieu stability diagram, some ions (m0) are ejected by the non-linear field rather than by the quadrupole field at qz=0.908 on the βz=1 boundary. The prematurely ejected ions will be seen as a peak at m1=(q*/0.908)m0, which we have termed a ‘ghost peak’.
Additional Material:
15 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/rcm.1290090202
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