Relative mass accuracy

{
  "id": "MLC-T-CHM-010148",
  "term": "Relative mass accuracy",
  "field": "Chemistry",
  "definition": "A measure of the accuracy of a mass measurement, expressed as the mass accuracy divided by the reference mass and reported in parts per million (ppm). It indicates how close a measured mass-to-charge ratio is to its theoretical value. Errors within about 5 ppm are commonly taken as supporting a proposed elemental composition for small molecules.",
  "subject": "Analytical Chemistry",
  "see_also": [
    "mass accuracy"
  ],
  "references": [
    "PAC, 2020, 92, 1781. 'Glossary of methods and terms used in surface chemical analysis (IUPAC Recommendations 2020)' on page 1844 (https://doi.org/10.1515/pac-2019-0404)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/relative-mass-accuracy/"
}