Term: ion cyclotron resonance (ICR) mass spectrometer (ICR)
https://doi.org/10.1351/goldbook.I03162

Definition:
A high-frequency mass spectrometer in which the ions to be detected, with a selected value of the quotient mass/charge, absorb maximum energy through the effect of a high-frequency electric field and a constant magnetic field perpendicular to the electric field. Maximum energy is gained by the ions which satisfy the cyclotron resonance condition and as a result they are separated from ions of different mass/charge.

Related Terms:
1) mass spectrometer (http://doi.org/10.1351/goldbook.M03732).
2) cyclotron (http://doi.org/10.1351/goldbook.C01509).
3) resonance (http://doi.org/10.1351/goldbook.R05326).

Source: Orange Book, 2nd ed., p. 202 (https://media.iupac.org/publications/analytical_compendium/)

Citation: 'ion cyclotron resonance (ICR) mass spectrometer (ICR)' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. https://doi.org/10.1351/goldbook.I03162

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