https://doi.org/10.1351/goldbook.08258
Area under a spectral band in an absorption spectrum where the absorption is linearly proportional to the amount of absorber in unit area.
Notes:
- The area under a band in a transmittance spectrum is not linearly proportional to the amount of absorber.
- The absorption quantity is usually a Beer-Lambert absorption coefficient, but recently
, the wavenumber times the imaginary part of local molar polarizability, has been used for neat liquids to correct for dielectric effects.