Fixed product ion spectrum

{
  "id": "MLC-T-CHM-004464",
  "term": "Fixed product ion spectrum",
  "field": "Chemistry",
  "definition": "A mass spectrum recorded by selecting one product ion m/z and determining all the precursor ion m/z values that fragment to give it. Its x-axis therefore lists precursors, and the peaks mark every ion in the sample that yields the chosen fragment, as with the m/z 184 phosphocholine fragment used to find phosphatidylcholine lipids. It is the converse of the spectrum from a fixed precursor ion scan, which lists the products of one chosen precursor.",
  "subject": "Physical and Biophysical Chemistry",
  "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 1551 (https://doi.org/10.1351/pac199163101541)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/fixed-product-ion-spectrum/"
}