Drying and storage of macaúba fruit: chemical and oxidative stability

Abstract

The objective of this study was to evaluate the chemical and oxidative stability of dried macaúba (Acrocomia totai) fruit in different air conditions and stored for up to 120 days. The macaúba fruits were collected, sanitized, dried at the temperatures of 40, 50, 60 and 70 °C and stored in raffia bags at room temperature. Drying at higher temperatures resulted in pulps with a darker and orangish color and pulp oil with lower titratable acidity contents and acidity indices. Throughout storage, there was an increase in the acidity index of pulp oil and a reduction in the ascorbic acid and carotenoid contents in the pulp. Drying and storage reduced the ascorbic acid and carotenoid contents of the pulp. Drying at lower temperatures results in pulps with a higher free-radical sequestering ability. Pulp oil quality was compromised by drying and storage time. Newly harvested macaúba fruits can be dried at 40, 50, 60 or 70 °C and stored for up to 120 days without compromising nut oil quality.