The abbreviation
is used to denote the dimensionless quantity formed by dividing the
mass number of an ion by its
charge number. It has long been called the mass-to-charge ratio although
is not the ionic mass nor is
a multiple or the elementary (electronic) charge,
. The abbreviation
is, therefore, not recommended. Thus, for example, for the ion
(C7H72+)
,
equals 45.5.
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 1544
Cite as:
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.
