Adventitious carbon referencing

{
  "id": "MLC-T-CHM-000298",
  "term": "Adventitious carbon referencing",
  "field": "Chemistry",
  "definition": "A method used in X-ray photoelectron spectroscopy (XPS) to correct for charging effects on insulating samples by setting the binding energy of the C 1s peak from adventitious carbon to a fixed value, typically 284.8 eV or 285.0 eV. This approach assumes that the adventitious carbon is electrically coupled to the sample surface and experiences the same charging. It provides a convenient internal reference for energy scale calibration.",
  "subject": "Analytical Chemistry",
  "see_also": [
    "Fermi level referencing",
    "charging potential"
  ],
  "references": [
    "PAC, 2020, 92, 1781. 'Glossary of methods and terms used in surface chemical analysis (IUPAC Recommendations 2020)' on page 1819 (https://doi.org/10.1515/pac-2019-0404)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/adventitious-carbon-referencing/"
}