Mass accuracy

{
  "id": "MLC-T-CHM-006968",
  "term": "Mass accuracy",
  "field": "Chemistry",
  "definition": "The deviation between the experimentally measured mass-to-charge ratio (m/z) of an ion and its theoretically calculated exact m/z value. This parameter serves as a key performance indicator for a mass spectrometer, reflecting its ability to determine the mass of an ion precisely. Mass accuracy is expressed either in absolute units, such as millimass units (mmu), or more frequently as a relative deviation in parts per million (ppm).",
  "subject": "Analytical Chemistry",
  "see_also": [
    "relative mass accuracy"
  ],
  "references": [
    "PAC, 2020, 92, 1781. 'Glossary of methods and terms used in surface chemical analysis (IUPAC Recommendations 2020)' on page 1840 (https://doi.org/10.1515/pac-2019-0404)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/mass-accuracy/"
}