Stop-flow conditions

{
  "id": "MLC-T-CHM-011445",
  "term": "Stop-flow conditions",
  "field": "Chemistry",
  "definition": "Operating conditions in electrothermal atomic absorption spectrometry in which the flow of inert purge gas through the graphite tube is interrupted during the atomization step. Atoms then stay longer in the observation volume instead of being swept out, which raises peak absorbance and sensitivity. The gas flow is restored after atomization, and stopping it can shorten graphite tube life because the hot tube is exposed to more oxygen.",
  "subject": "Analytical Chemistry",
  "see_also": [
    "electrothermal atomic absorption spectroscopy"
  ],
  "references": [
    "PAC, 2021, 93, 647. 'Glossary of methods and terms used in analytical spectroscopy (IUPAC Recommendations 2019)' on page 735 (https://doi.org/10.1515/pac-2019-0203)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/stop-flow-conditions/"
}