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Frequency‐sweep fourier tranform ion cyclotron resonance spectroscopy
Author(s) -
Comisarow Melvin B.,
Marshall Alan G.
Publication year - 1996
Publication title -
journal of mass spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.475
H-Index - 121
eISSN - 1096-9888
pISSN - 1076-5174
DOI - 10.1002/jms.1190310603
Subject(s) - fourier transform ion cyclotron resonance , chemistry , ion cyclotron resonance , cyclotron , fourier transform , selected ion monitoring , ion , fourier transform spectroscopy , analytical chemistry (journal) , cyclotron resonance , nuclear magnetic resonance , mass spectrometry , atomic physics , physics , infrared spectroscopy , gas chromatography–mass spectrometry , organic chemistry , chromatography , quantum mechanics
A single ion cyclotron resonance (ICR) absorption spectrum showing both CH 3 +and CH 4 +signals has been obtained by exciting both ion cyclotron resonances with a frequency‐swept rf irradiation, followed by broad‐band detection, digitization of the (timedomain) response, and finally discrete Fourier transformation to produce the (frequency‐domain) spectrum. Pulsed‐excitution Fourier transform ICR has demonstrated the use of broad‐band detection in rapid generation of ICR spectra by Fourier transform methods; this paper demonstrates that frequency‐sweep excitation can provide the broad‐band irradiation required to excite ion cyclotron resonances throughout any desired mass range. It will thus be possible to obtain an ICR absorption spectrum of given mass range, signal‐to‐noise ratio, and resolution in an observation period which is two orders of magnitude shorter than that needed to obtain the same spectrum by conventional slow‐sweep detection.