B American Society for Mass Spectrometry, 2017 J. Am. Soc. Mass Spectrom. (2017) 28:2724Y2725 DOI: 10.1007/s13361-017-1801-1 COMMENT AND REPLY Comment on: The definition of nominal mass parallels that of mon- BNominal Mass?^ by Athula B. Attygalle and Julius oisotopic mass, which is defined as the exact mass of an Pavlov, J. Am. Soc. Mass Spectrom. 28, 1737-1738 (2017) ion or molecule calculated using the mass of the most abundant isotope of each element . The exact mass of a molecule or ion is the sum of the masses of its recent correspondence  suggests that the current constituent isotopes. Thus, every molecule has a single AInternational Union of Pure and Applied Chemistry monoisotopic mass as well as a single nominal mass. (IUPAC) recommendation  for the definition of Both concepts are useful and their definitions rely on nominal mass is flawed and should be expanded so that the concept of most abundant isotope. all possible isotope combinations for a molecule or ion The term integer mass is currently used in the way can be assigned a whole number mass. The authors that the authors suggest for their revised definition of propose a revised definition for nominal mass as Bthe
Journal of The American Society for Mass Spectrometry – Springer Journals
Published: Sep 8, 2017
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