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|ORANGE BOOK DEFINITION
IUPAC. Analytical Division. Compendium of Analytical Nomenclature (the Orange Book). Definitive Rules, 1979.
|IUPAC 1997 Orange Book Chapter 12|
|Index of Orange Book Terms|
|GOLD BOOK DEFINITION
IUPAC. Compendium of Chemical Terminology, 2nd ed. (the Gold Book). Compiled by A. D. McNaught and A.Wilkinson. Blackwell Scientific Publications, Oxford (1997).
The abbreviation m/z 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 m is not the ionic mass nor is z a multiple or the elementary (electronic) charge, e. The abbreviation m/e is, therefore, not recommended. Thus, for example, for the ion C7H72+, m/z equals 45.5.
|IUPAC Gold Book|
|Index of Gold Book Terms|
See additional comments on the M/z discussion page (archive of discussion between 2004 and 2006)