Self-chemical ionization

{
  "id": "MLC-T-CHM-010705",
  "term": "Self-chemical ionization",
  "field": "Chemistry",
  "definition": "A chemical ionization process in mass spectrometry where the sample molecules themselves act as both the precursor ions and the reagent gas for ionization. This occurs when the sample is introduced at a relatively high pressure, allowing for ion-molecule reactions between the sample molecules. It is a less common ionization method compared to conventional chemical ionization with an external reagent gas.",
  "subject": "Analytical Chemistry",
  "see_also": [
    "reagent ion"
  ],
  "references": [
    "PAC, 2013, 85, 1515. 'Definitions of terms relating to mass spectrometry (IUPAC Recommendations 2013)' on page 1590 (https://doi.org/10.1351/PAC-REC-06-04-06)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/self-chemical-ionization/"
}