https://doi.org/10.1351/goldbook.I03302
Wavelength, wavenumber or frequency at which the total energy emitted by a sample as heat does not change upon a chemical reaction in or a physical change of the sample. Its position depends on the experimental conditions.
Note:
The spectral differences between the isosbestic points and the iso-optoacoustic points are the result of the non-linear relationship between the molar absorption coefficient and the photoacoustic signal.
The spectral differences between the isosbestic points and the iso-optoacoustic points are the result of the non-linear relationship between the molar absorption coefficient and the photoacoustic signal.