Abstract
Cnidoscolus quercifolius seeds were subjected to oil extraction with supercritical CO2 at 40, 50, and 60 °C and 20, 25, and 30 MPa for 120 min at 5 g min−1. The oils obtained were evaluated from the viewpoint of their yield, composition, and antioxidant activity; they were compared with the oil obtained using the conventional Soxhlet extraction method with n-hexane. Sovovás’ mathematical model was used to adjust the kinetic curves. The highest oil yield (41.0 wt%) was obtained at 60 °C and 30 MPa and corresponded to ∼87% of the Soxhlet yield. In this condition, the highest yields of tocopherols and β-sitosterol were obtained, i.e., 8.87 and 51.6 mg 100 gseed−1, respectively. The oils extracted by both the methods showed a similar fatty acid composition with a predominance of linoleic acid (∼60%). The highest antioxidant activity was equivalent to 6.82 mmol of trolox per kg of oil.
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