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|  | == [[Orange Book]] Entry ==
 |  | #REDIRECT [[Mass/charge ratio]] | 
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|  | ''m/z'' ratio.
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|  | == [[Gold Book]] Entry ==
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|  | 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 C<sub>7</sub>H<sub>7</sub><sup>2+</sup>, ''m/z'' equals 45.5..
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|  | == References ==
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|  | :[http://www.iupac.org/goldbook/Q04982.pdf gold book: quantity]
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|  | :[http://www.iupac.org/goldbook/P04666.pdf gold book: physical quantity]
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|  | :[http://www.iupac.org/goldbook/V06593.pdf gold book: value of a quantity]
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