M/z

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DRAFT DEFINITION
M/z
The symbol m/z is used to denote the dimensionless quantity formed by dividing the mass number of an ion by its charge number. The symbol should consist of italicized lower case letters with no spaces.
Considered between 2004 and 2006 but not included in the 2006 PAC submission
This is an unofficial draft definition presented for information and comment.

Recommended terms | Full list of terms


See additional comments on the M/z discussion page (archive of discussion between 2004 and 2006)


Orange Book Entry

m/z ratio.

Gold Book Entry

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.


Related Terms

Mass/Charge Ratio

Thomson

Dalton