This work presents a study on tannins from aroeira-preta (Myracrodruon urundeuva), based on acetone-water (AA) and methanol-water (MA) extracts, in which the contents of total phenols and proanthocyanidins were determined. The total phenols were determined by the Folin-Ciocalteau method and the modified Prussian Blue method. The contents obtained for AA were 19.1 and 24.7% and for MA, 20.2 and 22.8%, respectively by the Folin-Ciocalteau method and the modified Prussian Blue method. The proanthocyanidin contents were determined by the vanillin method, obtaining 2.7% in extract AA and 16.7% in extract MA. No evidence for the presence of antocyanidins and apigedinidins was found, but 3-deoxi-proantocyanidins of the luteolinidin type may be present in the extracts. Fisetin, gallic acid and ellagic acid were detected through high performance liquid chromatography (HPLC). These results show that Myracrodruon urundeuva wood contains a great amount of tannins, which can contribute to its natural durability.
Aroeira-preta; polyphenols; tannin
