Journal ArticleDOI
Relaxation and spectral line shape in Fourier transform ion resonance spectroscopy
TLDR
In this article, analytical expressions for Fourier transform ion cyclotron resonance (FT-ICR) line shape [absorption mode, dispersion mode, and magnitude (absolute value) mode] are derived for coherently excited ions that undergo both reactive and nonreactive ion-molecule collisions.Abstract:
Analytical expressions for Fourier transform ion cyclotron resonance (FT‐ICR) line shape [absorption mode, dispersion mode, and magnitude (absolute value) mode] are derived for coherently excited ions that undergo both reactive and nonreactive ion–molecule collisions. The expressions are valid at arbitrary sample pressure, and reduce to particularly simple form in the ’’zero‐pressure’’ limit (essentially no ion–molecule collisions during the data acquisition period) or ’’high‐pressure’’ limit (many ion–molecule collisions during the data acquisition period). The zero‐pressure line shape has been analyzed in earlier papers; in this paper, various useful properties of the high‐pressure line shape (e.g., linewidth, mass resolution, and upper mass limit) are tabulated for various choices of the fraction of maximal absorption (or magnitude) peak height at which linewidth is to be measured. Absorption, dispersion, and magnitude spectra are plotted for zero‐pressure and high‐pressure limits, and also for an inte...read more
Citations
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Journal ArticleDOI
Fourier transform ion cyclotron resonance mass spectrometry: A primer
TL;DR: This review offers an introduction to the principles and generic applications of FT-ICR mass spectrometry, directed to readers with no prior experience with the technique, and lists accurate fundamental constants needed for ultrahigh-precision analysis.
Journal ArticleDOI
Petroleomics: The Next Grand Challenge for Chemical Analysis
Alan G. Marshall,Ryan P. Rodgers +1 more
TL;DR: The key features that have opened up this new field have been ultrahigh-resolution FT-ICR mass analysis, specifically, the capability to resolve species differing in elemental composition by C(3) vs SH(4) (i.e., 0.0034 Da), thereby extending to >900 Da the upper limit for unique assignment of elemental composition based on accurate mass measurement.
Journal ArticleDOI
Resolution of 11 000 Compositionally Distinct Components in a Single Electrospray Ionization Fourier Transform Ion Cyclotron Resonance Mass Spectrum of Crude Oil
TL;DR: Electrospray selectively ionizes only the basic compounds in a sample of South American crude oil, and mass scale expansion and graphical representations reveal increased heteroatom diversity, aromatic rings, and alkyl substitution with increased mass.
Journal ArticleDOI
Fourier transform mass spectrometry
TL;DR: In this paper, the fundamental principles of Fourier transform mass spectrometry (FTMS) are presented, and the motion of ions in a FTMS analyzer can be understood in terms of the magnetic and electric fields present in the analyzer cell.
Journal ArticleDOI
High-resolution mass spectrometers.
TL;DR: The principles and techniques of the highest-resolution analytical mass spectrometers (time-of-flight and Fourier transform ion cyclotron resonance and orbitrap mass analyzers) are reviewed and some representative high-resolution applications are described.
References
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Journal ArticleDOI
Fourier Transform Ion Cyclotron Resonance Spectroscopy
TL;DR: The Fourier transform ion cyclotron resonance (FT-ICR) 1.5 mass spectrometer as discussed by the authors was developed for mass spectroscopy and it can be used to obtain the whole spectrum in a very short period of time.
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Frequency-sweep fourier transform ion cyclotron resonance spectroscopy
TL;DR: In this paper, the authors demonstrated that frequency-sweep excitation can provide the broad-band irradiation required to excite ion cyclotron resonances throughout any desired mass range.
Journal ArticleDOI
Ion Cyclotron Resonance Spectroscopy
TL;DR: Ion cyclotron resonance spectroscopy has met with such wide acceptance that research groups utilizing this relatively new experimental technique now likely outnumber research groups which have used more traditional techniques, such as high pressure mass spectrometry, for the study of ion-molecule reactions as discussed by the authors.
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The Production of High Speed Light Ions Without the Use of High Voltages
TL;DR: In this paper, a method for multiple acceleration of light ions to high speeds without the use of high voltages is described, where the magnetic field is adjusted so that the time required for traversal of a semi-circular path within the electrodes equals a half period of the oscillations, and when the ions return to the region between the electrodes, the electric field will have reversed direction, and they thus receive second increments of velocity on passing into the other electrode.