Direct analysis in real time

{
  "id": "MLC-T-CHM-003248",
  "term": "Direct analysis in real time",
  "field": "Chemistry",
  "definition": "An ambient ionization technique for mass spectrometry that allows for the direct analysis of samples in their native state with minimal preparation. A stream of heated, metastable gas, such as helium or nitrogen, is directed at the sample surface, causing desorption and ionization of surface molecules. This method is distinct from plasma-assisted desorption ionization mass spectrometry, which uses a dielectric barrier discharge plasma for ionization.",
  "subject": "Analytical Chemistry",
  "see_also": [
    "plasma assisted desorption ionization mass spectrometry"
  ],
  "references": [
    "PAC, 2020, 92, 1781. 'Glossary of methods and terms used in surface chemical analysis (IUPAC Recommendations 2020)' on page 1786 (https://doi.org/10.1515/pac-2019-0404)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/direct-analysis-in-real-time/"
}