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Supercritical CO2 extraction of favela (Cnidoscolus quercifolius) seed oil: Yield, composition, antioxidant activity, and mathematical modeling

2020; Elsevier BV; Volume: 165; Linguagem: Inglês

10.1016/j.supflu.2020.104981

1872-8162

Kátia Andressa Santos, Edson Antônio da Silva, Camila da Silva,

Antioxidant Activity and Oxidative Stress

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.