Use of Roselle (Hibiscus sabdariffa) in Composite Materials for Sustainability

Prosopis alba exudate gum as new carrier agent for obtaining powdered Hibiscus sabdariffa aqueous extracts by spray drying

“…HE showed a wide peak between 2900 and 3600 cm -1 attributable to bonded -OH and typical bands at 2932, 1403, and 1059 cm -1 due to -CH, C-C and C-O groups, respectively [31]. According to Fragoso et al [32], bands observed between 1175 and 1400 cm −1 may correspond to phenolic compounds such as anthocyanins and condensed tannins.…”