MLchartDataset catalogue

Nominal mass

Term · Chemistry · MLC-T-CHM-007991

The integer mass of an ion or molecule, calculated by summing the integer masses of its most abundant isotopes. For example, the nominal mass of water (H2O) is 18 (1+1+16). This value is used for general identification in mass spectrometry and differs from the exact mass, which considers the precise isotopic masses.

Table 1. Record
IdentifierMLC-T-CHM-007991
FieldChemistry
SubjectAnalytical Chemistry
ReferencesPAC, 2020, 92, 1781. 'Glossary of methods and terms used in surface chemical analysis (IUPAC Recommendations 2020)' on page 1842 (https://doi.org/10.1515/pac-2019-0404)
Record as JSON 
{
  "id": "MLC-T-CHM-007991",
  "term": "Nominal mass",
  "field": "Chemistry",
  "definition": "The integer mass of an ion or molecule, calculated by summing the integer masses of its most abundant isotopes. For example, the nominal mass of water (H2O) is 18 (1+1+16). This value is used for general identification in mass spectrometry and differs from the exact mass, which considers the precise isotopic masses.",
  "subject": "Analytical Chemistry",
  "references": [
    "PAC, 2020, 92, 1781. 'Glossary of methods and terms used in surface chemical analysis (IUPAC Recommendations 2020)' on page 1842 (https://doi.org/10.1515/pac-2019-0404)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/nominal-mass/"
}

Record 8,485 of 13,676 in Chemistry terminology (MLC-0109). Request the full dataset.