To conduct a comparative analysis, a basic (NaOH 0.1N, 100 °C, 6 h) and acid (HCl 6N, 110 °C, 24 h) hydrolysis procedure was performed following previous reports [46,66]. After treatment, the samples (Phases I, II, and III) were analyzed by a GC system coupled to a 5975 VL MSD (Agilent®). The detection and characterization of different signals were performed as previously reported [9,46].
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