In:
European Journal of Mass Spectrometry, SAGE Publications, Vol. 11, No. 1 ( 2005-02), p. 15-21
Abstract:
Real-time experiments involving fragmentation of the precursor molecular ion of n-butylbenzene ( m/z 134) to produce product ions C 7 H + 7 ( m/z 91) and C 7 H + 8 ( m/z 92), were used to observe the motion of ions in a commercial quadrupole ion trap. Initially, ghost resonance peaks were observed for excitation of the precursor ion at q z values of 0.4 and 0.5 on the q z axis of the stability diagram. Further experiments involving the generation of two-dimensional contour plots confirmed that these ghost peaks, which were in agreement with mathematical equations describing the motion of ions in a quadrupole field, arose due to waveboard artifacts. Two-dimensional contour surface plots showed non-linear secular frequency canyons from a q z value of 0.5 to higher values corresponding with higher drive radio frequency (rf) voltages on the stability diagram. This observation confirmed that ions are subjected to non-linear effects in this mass scan range. The octapole and hexapole field lines were observed at q z values of 0.65 and 0.78, respectively.
Type of Medium:
Online Resource
ISSN:
1469-0667
,
1751-6838
Language:
English
Publisher:
SAGE Publications
Publication Date:
2005
detail.hit.zdb_id:
2021540-X
detail.hit.zdb_id:
2021340-2
SSG:
11
SSG:
12
