Fig 14. Adulterated beeswax samples versus genuine beeswax (reference standard) with an emphasis on spectral regions indicative for adulteration detection: Stearic acid—adulterated beeswax samples.

Due to some spectra overlaps (close share of spectra to 2%), only spectra with more than 2% of difference were presented in this figure. Wavenumber, the number of waves per unit distance; cm, centimetre; a.u. is for the absorbance unit.