Exploratory Analysis Applied for the Evaluation of Yerba Mate Adulteration (Ilex paraguariensis)

Effect of yerba mate extract on the performance of starch films obtained by extrusion and compression molding as active and smart packaging

“…The absorption peak at around 2922 cm -1 is due to a stretching vibration of aliphatic CH, and the bands observed between 1800 cm −1 and 1500 cm −1 correspond to the carbonyl group of esters, amides, acids and other compounds such as Xanthines and Saponins, existing in yerba mate J o u r n a l P r e -p r o o f(Marcelo, Pozebon, & Ferrão, 2015). The bands in the regions between 1500 cm −1 and 1000 cm −1 are related to the stretching vibration of the C-O(Schneider et al, 2018).Films exhibited the typical behavior of thermoplastic starch based materials(Pereira Jr, de Arruda, & Stefani, 2015;Warren, Gidley, & Flanagan, 2016). They showed the significant absorption peak at 3600-3000 cm −1 corresponding to O-H stretching, a double peak at 3000-2800 cm -1 associated to C-H stretching, bands at 1150-1100 cm −1 (C-O, C-C and C-O-H stretching), a double peak at 1100-990 cm −1 (C-O-H bending),…”