in mass spectrometry
https://doi.org/10.1351/goldbook.C01026
This concerns the process whereby new @[email protected] species are formed when gaseous molecules interact with ions. The process may involve transfer of an electron, @[email protected] or other charged species between the reactants. When a positive ion results from chemical @[email protected], the term may be used without qualification. When a negative ion is involved, the term negative ion chemical @[email protected] should be used; note that negative ion formation by @[email protected] of a free electron does not fall within this definition. Chemical @[email protected] and [email protected]@ are two terms which should not be used interchangeably.
See:
electron attachment
See also:
chemi-ionization (in mass spectrometry)
Sources:
Orange Book, 2nd ed., p. 204 [Terms] [Book]
PAC, 1990, 62, 2167. (Glossary of atmospheric chemistry terms (Recommendations 1990)) on page 2179 [Terms] [Paper]
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]