Journal
INTERNATIONAL JOURNAL OF MASS SPECTROMETRY
Volume 215, Issue 1-3, Pages 59-75Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/S1387-3806(01)00588-7
Keywords
Fourier transform; ion cyclotron resonance; ICR; FTMS
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Fourier transform ion cyclotron resonance mass spectrometry is based on image current detection of coherently excited ion cyclotron motion. The detected signal magnitude and peak shape may be understood from idealized behavior: single ion, zero-pressure, spatially uniform magnetic field, three-dimensional axial quadrupolar electrostatic trapping potential, and spatially uniform resonant alternating electric field. In practice, deviation from any of the above conditions will shift, distort split, and/or coalesce FT-ICR mass spectral peaks. Fortunately, such peak distortions may typically be avoided by appropriate experimental design and/or greatly minimized by internal frequency-to-m/z calibration. Various aspects of modem FT-ICR detection (hardware and software) are discussed. (Int J Mass Spectrom 215 (2002) 59-75) (C) 2002 Elsevier Science B.V. All rights reserved.
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