Closed-loop extraction

{
  "id": "MLC-T-CHM-002135",
  "term": "Closed-loop extraction",
  "field": "Chemistry",
  "definition": "An extraction in which a fixed volume of gas is pumped around a closed circuit, stripping volatile analytes from the sample and passing them through a small sorbent trap, usually activated carbon, where they accumulate. The trap is then eluted with a few microlitres of solvent for gas chromatography. The method underlies closed-loop stripping analysis of trace organic compounds such as odour compounds in drinking water.",
  "synonyms": [
    "closed-loop stripping analysis"
  ],
  "subject": "Analytical Chemistry",
  "see_also": [
    "sorbent trap"
  ],
  "references": [
    "PAC, 2016, 88, 517. 'Glossary of terms used in extraction (IUPAC Recommendations 2016)' on page 527 (https://doi.org/10.1515/pac-2015-0903)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/closed-loop-extraction/"
}