Double-beam spectrometer

{
  "id": "MLC-T-CHM-013049",
  "term": "Double-beam spectrometer",
  "field": "Chemistry",
  "definition": "An instrument that splits a beam of electromagnetic radiation into two separate paths, a sample beam and a reference beam, before they reach the detector. The sample beam passes through the analyte, while the reference beam passes through a blank or reference material. The instrument electronically compares the intensities of the two beams, which automatically corrects for fluctuations in source intensity and detector response over time.",
  "subject": "Analytical Chemistry",
  "see_also": [
    "luminescence spectrometer",
    "spectrometer",
    "synchronous",
    "wavelength"
  ],
  "references": [
    "Orange Book, 2nd ed., p. 191 (https://media.iupac.org/publications/analytical_compendium/)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/double-beam-spectrometer/"
}