Fourier transform-ion cyclotron resonance-mass spectrometer: Difference between revisions
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A [[mass spectrometer]] based on the principle of [[ion cyclotron resonance]] in which an ion in a magnetic field moves in a circular orbit at a frequency characteristic of its ''[[m/z]]'' value. Ions are excited to a coherent orbit using a pulse of radio frequency energy and their image charge is detected on receiver plates as a time domain signal. Fourier transformation of the time domain signal results in a frequency domain signal which is converted to a [[mass spectrum]] based in the inverse relationship between frequency and ''[[m/z]]''. | |||
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== [[Orange Book]] Entry == | == [[Orange Book]] Entry == | ||
Revision as of 10:57, 3 August 2006
Obsolete Template
Orange Book Entry
A high-frequency mass spectrometer in which the cyclotron motion of ions, having different mass/charge ratios, in a constant magnetic field, is excited essentially simultaneously and coherently by a pulse of a radio-frequency electric field applied perpendicularly to the magnetic field. The excited cyclotron motion of the ions is subsequently detected on receiver plates as a time domain signal that contains all the cyclotron frequencies excited. Fourier transformation of the time domain signal results in a frequency domain FT-ICR signal which, on the basis of the inverse proportionality between frequency and mass/charge ratio, can be converted to a mass spectrum. See also ion cyclotron resonance (ICR) mass spectrometer.
