Photoacoustic saturation

{
  "id": "MLC-T-CHM-008792",
  "term": "Photoacoustic saturation",
  "field": "Chemistry",
  "definition": "A condition in photoacoustic spectroscopy where the signal no longer increases linearly with increasing incident light intensity or analyte concentration. This occurs when the rate of thermal energy conversion within the sample becomes limited, often due to the optical absorption depth becoming comparable to or smaller than the thermal diffusion depth. Saturation can lead to inaccurate quantitative measurements if not accounted for.",
  "subject": "Analytical Chemistry",
  "see_also": [
    "optical absorption depth",
    "thermal diffusion depth"
  ],
  "references": [
    "PAC, 2021, 93, 647. 'Glossary of methods and terms used in analytical spectroscopy (IUPAC Recommendations 2019)' on page 759 (https://doi.org/10.1515/pac-2019-0203)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/photoacoustic-saturation/"
}