Fragment ion

{
  "id": "MLC-T-CHM-004637",
  "term": "Fragment ion",
  "field": "Chemistry",
  "definition": "An ion formed when a larger molecular ion or another ion undergoes dissociation, typically due to excess internal energy imparted during ionization. These ions provide structural information about the original molecule in mass spectrometry. The pattern of fragment ions forms a characteristic mass spectrum for a compound.",
  "subject": "Physical and Biophysical Chemistry",
  "see_also": [
    "daughter ion",
    "dissociation",
    "fragmentation",
    "weight"
  ],
  "references": [
    "Orange Book, 2nd ed., p. 205 (https://media.iupac.org/publications/analytical_compendium/)",
    "PAC, 1990, 62, 2167. 'Glossary of atmospheric chemistry terms (Recommendations 1990)' on page 2190 (https://doi.org/10.1351/pac199062112167)",
    "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/fragment-ion/"
}