Attenuated total reflection

{
  "id": "MLC-T-CHM-000929",
  "term": "Attenuated total reflection",
  "field": "Chemistry",
  "definition": "A phenomenon where an electromagnetic wave, typically infrared light, undergoes total internal reflection at the interface between a high refractive index crystal and a lower refractive index sample. A portion of the evanescent wave penetrates into the sample, allowing for absorption of energy. This technique is widely used in infrared spectroscopy for analyzing opaque or highly absorbing samples.",
  "synonyms": [
    "frustrated total internal reflection"
  ],
  "subject": "Analytical Chemistry",
  "see_also": [
    "internal reflection",
    "angle of incidence",
    "attenuated total reflection spectroscopy",
    "critical angle",
    "multiple attenuated total reflection"
  ],
  "references": [
    "PAC, 2021, 93, 647. 'Glossary of methods and terms used in analytical spectroscopy (IUPAC Recommendations 2019)' on page 652 (https://doi.org/10.1515/pac-2019-0203)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/attenuated-total-reflection/"
}