An ion formed by interaction of a molecule with a proton
abstracted from an ion, as often occurs in chemical ionization
according to the reaction:
[M + H]+
may also be used to represent the protonated molecule. The widely used term 'protonated molecular ion
' to describe the
ion is not recommended, since it suggests an associated product of a proton
with a molecular ion.
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 1550
IUPAC. Compendium of Chemical Terminology, 2nd ed. (the "Gold Book"). Compiled by
A. D. McNaught and A. Wilkinson. Blackwell Scientific Publications, Oxford (1997).
XML on-line corrected version: http://goldbook.iupac.org (2006-) created by M. Nic,
J. Jirat, B. Kosata; updates compiled by A. Jenkins. ISBN 0-9678550-9-8. https://doi.org/10.1351/goldbook