FTIR-ATR spectra of reference standards (stearic acid-beeswax mixtures containing different proportions of stearic acid) used for calibration.
Wavenumber, the number of waves per unit distance; cm, centimetre; a.u. is for the absorbance unit.
Wavenumber, the number of waves per unit distance; cm, centimetre; a.u. is for the absorbance unit.