Nominal mass: Difference between revisions
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{{ | {{DefName|The mass of an ion or molecule calculated using the mass of the most abundant isotope of each element.}} | ||
Revision as of 15:56, 14 May 2005
| DRAFT DEFINITION |
| Nominal mass |
|---|
| The mass of an ion or molecule calculated using the mass of the most abundant isotope of each element. |
| Considered between 2004 and 2006 but not included in the 2006 PAC submission |
| This is an unofficial draft definition presented for information and comment. |
| See proposed definition on the Nominal mass discussion page. |
Related Terms
External Links
- The mass of an ion containing the most abundant isotopes, calculated with nominal atomic weights.??????????????
- The nominal mass of an ion is calculated by simply adding the integer masses of the lightest isotopes of all elements contributing to the molecule, e.g. to calculate the nominal mass of CH3Br you have to use the nominal masses of 12C, 1H, and 79Br to obtain Mnomi = 94 amu
Shimadzu Mass Spectrometry Glossary
- Same meaning as mass number (Nearest integer when expressing the mass of an atom in units that define 12C as 12. The number is approximately the sum of protons and neutrons in the atomic nucleus. In mass analysis the mass number is the sum of the masses of the atoms making up an ion or other particle (12C = 12, 1H = 1, 16O = 16, 14N = 14...))
