chemi-ionization

in mass spectrometry
https://doi.org/10.1351/goldbook.C01044
This refers to a process whereby gaseous molecules are ionized when they interact with other internally excited gaseous molecules or molecular moieties. Chemi-ionization and chemical ionization are two terms which should not be used interchangeably.
See also: associative ionization (in mass spectrometry), chemical ionization (in mass spectrometry) (in mass spectrometry)
Sources:
Orange Book, 2nd ed., p. 204 [Terms] [Book]
PAC, 1991, 63, 1541. (Recommendations for nomenclature and symbolism for mass spectroscopy (including an appendix of terms used in vacuum technology). (Recommendations 1991)) on page 1547 [Terms] [Paper]
Citation: 'chemi-ionization' 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.C01044 RIS BibTex EndNote
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