positive ion

in mass spectrometry
https://doi.org/10.1351/goldbook.P04768
This is an atom, radical, molecule or molecular @[email protected] which has lost one of more electrons thereby attaining an electrically positive charge. The use of the term @[email protected] as an alternative is not recommended. The use of mass ion is not recommended.
See:
negative ion (in mass spectrometry)
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 1549 [Terms] [Paper]