Optimization of extraction parameters of phenolic compounds from pequi pulp (Caryocar brasiliense Camb.)
This work aimed to found the best conditions to extract phenolic compounds from pequi pulp. The study was conducted according to an experimental design in order to evaluate the influence of temperature (30 and 70°C) and pulp concentration (15 and 70 g 100 mL-1) in the aqueous extraction of phenolic compounds (TPC) from pequi pulp. A central composite design was applied to optimize the extraction conditions with three replicates at the central point. Answers were evaluated considering a significance level of 5%. The results showed that increases in the temperature resulted in increases of the TPC values, however increases in pulp concentration resulted in decreases of TPC values. Thus, results suggest that optimal conditions for extracting phenolic compounds are at temperatures up to 80°C and concentrations lower than 11.9 g 100 mL-1. The total phenolic content was of 105,51 mg EAG 100 g-1 of pulp for extractions at 80°C (maximum temperature) and 11.9 g 100mL-1 (minimal concentration).