ISSN:
0951-4198
Schlagwort(e):
Chemistry
;
Analytical Chemistry and Spectroscopy
Quelle:
Wiley InterScience Backfile Collection 1832-2000
Thema:
Physik
Notizen:
This paper describes implementation of a storage waveform technique for manipulation of ions in a quadrupole ion trap. The technique is similar to the well established storage waveform inverse Fourier-transform (SWIFT) technology for controlling ion motion in Fourier-transform ion cyclotron resonance (FT-ICR). These techniques allow one to manipulate ions stored in the trap through computer control. The focus of this paper is the application of the storage waveform technique to the chemical noise problems associated with the analytical applications of atmospheric-pressure ionization/ion-trap mass spectrometry. In particular, the wave function described results in selected-ion accumulation in the trap in a mass window of ∼ 100 u. The position of the mass window can easily be adjusted across the mass range, thus providing selective accumulation in the trap only for ions of interest, while removing all others. The technique is easily implemented for routine use with on-line separations, resulting in improved sensitivity by significantly reducing ion current from interfering chemical background.
Zusätzliches Material:
4 Ill.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1002/rcm.1290071215
