Evaluation of favela seed oil extraction with alternative solvents and pressurized-liquid ethanol

• Published in: The Journal of supercritical fluids Vol. 169; p. 105125
• Main Authors: Santos, Kátia Andressa, de Aguiar, Caroline Mariana, da Silva, Edson Antônio, da Silva, Camila
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01-02-2021
• Subjects: Alternative solvents; Cnidoscolus quercifolius; Ethanol; Oil characterization; Pressurized-liquid extraction; Cnidoscolus quercifolius; Oil characterization; Pressurized-liquid extraction; Ethanol; Alternative solvents
• ISSN: 0896-8446; 1872-8162
• DOI: 10.1016/j.supflu.2020.105125

•Favela seed oil was extracted by Soxhlet with ethanol, isopropanol, and ethyl acetate.•Effects of flow rate and temperature on pressurized-ethanol extraction were evaluated.•Fatty acids, acylglycerols, tocopherols, and β-sitosterol were analyzed.•Oil extracted by Soxhlet with ethanol presented the highest antioxidant activity.•PLE technique with ethanol was effective for the recovery of oil from favela seeds.
[Display omitted]
In this study, oil was extracted from favela (Cnidoscolus quercifolius) seeds via the Soxhlet method using ethanol, isopropanol, ethyl acetate, and n-hexane as solvents. Ethanol provided the highest oil yield (49.6 wt%), β-sitosterol concentration (131.6 mg 100 goil−1), TPC (197.4 mg GAE kgoil−1), and antioxidant activity (6.0 mmol Trolox kgoil−1). Therefore, ethanol was used for the non-conventional pressurized-liquid extraction (PLE) method. The effects of the mass flow rate (2, 3, and 4 g min−1) and temperature (40, 60, and 80 ºC) on the PLE with ethanol at 10 MPa were evaluated. A yield of up to 45.8 wt% was obtained when the amount of consumed ethanol was 58 g (~19 min of dynamic extraction). The Soxhlet- and PLE-obtained oils presented similar fatty acid profiles and contents of acylglycerols. No significant differences were observed in the total tocopherol and β-sitosterol concentrations of the oils extracted via PLE at different temperatures.