Quantification and Qualification of Tannins from Residues of Forest Species Hymenea courbaril Duke and Bowdichia virgiloides Kunth

This research aimed to compare yield and quality of tannic powder extracts from forest residues from jatobá (Hymenea courbaril Duke) and sucupira preta (Bowdichia virgiloides Kunth.) generated from a joinery. Tannic extract was obtained with an adapted soxhlete extractor. Extract was analysed about its extraction yield (Y%), total solids (TS%), humidity (H%), corrected soluble and insoluble solids (SS%, IS%), tannic and non-tannic contents through formaldehyde and skin powder method (TCf%, nTCf%, TCp%, nTCp%), ashes content (%), density (g cm-3) and pH. The experimental design was entirely casualized, with variables compared through F test. Jatobá presented yield of 15.87%, and black sucupira of 17.09%. For TCf% and nTCf%, jatobá presented 74.66% and 12.66% respectively, and black sucupira presented 64% and 12.66% respectively. Species showed potential for the production of tannic extract, with highlight to jatobá.