Parent ion

{
  "id": "MLC-T-CHM-008466",
  "term": "Parent ion",
  "field": "Chemistry",
  "definition": "An electrically charged species that dissociates to give fragments, at least one of which is charged and at least one neutral. It may be a molecular ion or a charged fragment of a molecular ion, so the term is wider than molecular ion. Current IUPAC mass spectrometry recommendations favour the term precursor ion for the ion selected in tandem mass spectrometry.",
  "subject": "Physical and Biophysical Chemistry",
  "see_also": [
    "moiety"
  ],
  "references": [
    "Orange Book, 2nd ed., p. 205 (https://media.iupac.org/publications/analytical_compendium/)",
    "PAC, 1991, 63, 1541. 'Recommendations for nomenclature and symbolism for mass spectroscopy (including an appendix of terms used in vacuum technology). (Recommendations 1991)' on page 1549 (https://doi.org/10.1351/pac199163101541)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/parent-ion/"
}