期刊
INTERNATIONAL JOURNAL OF MASS SPECTROMETRY
卷 194, 期 2-3, 页码 225-234出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/S1387-3806(99)00151-7
关键词
quadrupole ion trap; ion trap; ion motion; simulation; secular frequency
A new experimental technique is described for probing the motion of ions in a quadrupole ion trap via the application of short de pulses to one endcap electrode. The method, which arose from simulations conducted using a multi-ion simulation program, ITSIM, reveals details of the motion of trapped ions and allows experimental measurement of the ion secular frequency. It is shown that a short dc pulse having the appropriate phase relationship with respect to the phase of oscillation of a population of trapped ions may be used to activate and eject chosen species from the trap while leaving other ions, even isobaric ions, relatively unperturbed. This provides a possible basis for high resolution collisional activation and high resolution mass analysis in the Paul trap. (Int J Mass Spectrom 194 (2000) 225-234) (C) 2000 Elsevier Science B.V.
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