ion/neutral species exchange reaction

in mass spectrometry
https://doi.org/10.1351/goldbook.I03225
In this reaction an @[email protected] reaction is accompanied by the subsequent or simultaneous liberation of a different neutral species as product.
Source:
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 1556 [Terms] [Paper]