Extracts from dried stem barks of Stryphnodendron adstringens (barbatimão) were prepared with 90%, 80% and 70% of propylene glycol and water (PGL90, PGL80 and PGL70, respectively). The extract was prepared by percolation and collected as fractions of 100mL. The pH, density, dry residue and tannin and polyphenolic contents were determined for each fraction. The results showed that the extraction of chemical compounds was more efficient with PGL70, but PGL80 was more selective for extraction of tannins, the active compounds.
barbatimão; Stryphnodendron adstringens; tannins; propylene; glicol extracts