Needle trap

{
  "id": "MLC-T-CHM-007800",
  "term": "Needle trap",
  "field": "Chemistry",
  "definition": "A sampling device consisting of a hollow needle packed with a sorbent material, used for the extraction and preconcentration of volatile and semi-volatile organic compounds from gaseous or liquid samples. The analytes are adsorbed onto the sorbent within the needle and then thermally desorbed directly into a gas chromatograph for analysis. This technique offers a solvent-free and portable approach to sample preparation.",
  "subject": "Analytical Chemistry",
  "see_also": [
    "active sampling",
    "passive sampling",
    "sorbent"
  ],
  "references": [
    "PAC, 2016, 88, 517. 'Glossary of terms used in extraction (IUPAC Recommendations 2016)' on page 543 (https://doi.org/10.1515/pac-2015-0903)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/needle-trap/"
}