Absorbance matching

{
  "id": "MLC-T-CHM-000061",
  "term": "Absorbance matching",
  "field": "Chemistry",
  "definition": "A spectrophotometric procedure in which the sample is diluted with solvent until its absorbance equals that of a reference solution held in the reference cell, so that the analyte concentration follows from the dilution made. Because equal absorbances are compared directly rather than read from a calibration curve, it remains usable where absorbance is not proportional to concentration.",
  "subject": "Analytical Chemistry",
  "see_also": [
    "Beer-Lambert law",
    "absorbance"
  ],
  "references": [
    "PAC, 1988, 60, 1449. 'Nomenclature, symbols, units and their usage in spectrochemical analysis - VII. Molecular absorption spectroscopy, ultraviolet and visible (UV/VIS) (Recommendations 1988)' on page 1456 (https://doi.org/10.1351/pac198860091449)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/absorbance-matching/"
}