Electron capture detection

{
  "id": "MLC-T-MET-005329",
  "term": "Electron capture detection",
  "field": "Meteorology and atmospheric science",
  "definition": "An analytical technique used in gas chromatography to identify and quantify trace atmospheric gases that have a high affinity for capturing free electrons. A radioactive source, typically Nickel-63, ionizes a carrier gas to create a steady current of electrons, which is reduced when electronegative compounds pass through the detector. This method is exceptionally sensitive for measuring halogenated compounds like chlorofluorocarbons (CFCs) and sulfur hexafluoride at parts-per-trillion concentrations.",
  "abbreviation": "ECD",
  "url": "https://mlchart.com/terminology/meteorology/electron-capture-detection/"
}