M/z: Difference between revisions
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Three-character symbol ''m/z'' is used to denote the dimensionless quantity formed by dividing the mass of an ion in unified atomic mass units by its charge number (regardless of sign). The symbol is written in italicized lower case letters with no spaces. | Three-character symbol ''m/z'' is used to denote the dimensionless quantity formed by dividing the mass of an ion in unified atomic mass units by its charge number (regardless of sign). The symbol is written in italicized lower case letters with no spaces. | ||
Note 1: The | Note 1: The symbol ''m/z'' is not compatible to the the consensus of the international scientific community as described in the [[IUPAC green book]]. Use m/Q instead. | ||
Note 2: The proposed unit [[thomson]] (Th) is | Note 2: Use units u/e or Da/e. The proposed unit [[thomson]] (Th) is better. | ||
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Revision as of 12:56, 4 August 2006
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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
