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

2020; Elsevier BV; Volume: 169; Linguagem: Inglês

10.1016/j.supflu.2020.105125

1872-8162

Kátia Andressa Santos, Caroline Mariana de Aguiar, Edson Antônio da Silva, Camila da Silva,

Plant biochemistry and biosynthesis

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.