Isotopic molecular ion

{
  "id": "MLC-T-CHM-006248",
  "term": "Isotopic molecular ion",
  "field": "Chemistry",
  "definition": "A molecular ion that contains one or more atoms of a less abundant naturally occurring isotope, such as carbon-13, deuterium, or bromine-81, in place of the most abundant one. Its peaks sit beside the monoisotopic molecular ion peak, usually at higher m/z, although a lighter minor isotope such as boron-10 puts a peak at lower m/z. Their relative intensities follow natural isotope abundances, as in the roughly 1:1 pair of peaks produced by a bromine atom.",
  "subject": "Physical and Biophysical Chemistry",
  "see_also": [
    "isotopes"
  ],
  "references": [
    "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/isotopic-molecular-ion/"
}