Isotopically unmodified

{
  "id": "MLC-T-CHM-006256",
  "term": "Isotopically unmodified",
  "field": "Chemistry",
  "definition": "A chemical substance where the isotopic composition of its constituent elements is within the range of natural isotopic abundances. This implies no deliberate alteration or enrichment of specific isotopes has occurred. Such compounds serve as reference materials for comparison with isotopically modified substances in analytical studies.",
  "subject": "Inorganic Chemistry",
  "see_also": [
    "constituent",
    "nuclide"
  ],
  "references": [
    "Blue Book, p. 514 (https://www.acdlabs.com/iupac/nomenclature/)",
    "PAC, 1981, 53, 1887. 'Nomenclature of inorganic chemistry: II.1 - Isotopically modified compounds' on page 1889 (https://doi.org/10.1351/pac198153101887)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/isotopically-unmodified/"
}