The respective coupling constants are shown in Figure . As a result, the 1 H NMR spectrum of BPA can be distinguished from that of PBPAC by the stronger shielding effect of the monomer protons and the appearance of the singlet corresponding to the hydroxyl group protons at 4.7 ppm. These changes in the NMR and IR spectra can be considered as effectives markers to monitor depolymerization. To complete the analytical panel, the methanolysis product was finally also analyzed by MALDI-TOF, but BPA could not be detected, as expected, its mass falling in the mass range where matrix peaks are located. However, the combination of the other analytical methods presented here enables efficient confirmation of total depolymerization, and the identification of the methanolysis products, the latter being reduced, as expected, to bisphenol A alone.