Chemical characterization of gurguéia nut (Dipteryx lacunifera Ducke) and press cake oil obtained by hydraulic pressing and supercritical extraction.

Autor: Polmann, Gabriela, Teixeira, Gerson Lopes, Santos, Pedro Henrique, Rivera, Gerardo Álvarez, Ibañez, Elena, Cifuentes, Alejandro, Ferreira, Sandra Regina Salvador, Block, Jane Mara
Zdroj: Biomass Conversion & Biorefinery; Aug2024, Vol. 14 Issue 16, p19065-19080, 16p
Abstrakt: Dipteryx lacunifera, known as gurguéia nut, is a potential crop for obtaining specialty oils. The processing of gurguéia nut to obtain the oil generates circa 635 g kg−1 of cake, a biomass rich in residual oil. A sequential approach using hydraulic pressing (HP) and supercritical fluid extraction with CO2 (SFE-CO2) has been employed to maximize the oil recovery from gurguéia nut. High contents of β-sitosterol (55.8 mg 100 g−1), stigmasterol (38.6 mg 100 g−1), campesterol (13.9 mg 100 g−1), squalene (668.7 mg 100 g−1), total phenolics (6.1 mg GAE 100 g−1) and antioxidant potential (4.2 mg TE 100 g−1 in FRAP; 5.4% in DPPH; and 54.3% in ILP) were observed in the oil from SFE-CO2 as compared to HP and Soxhlet oils. Significant contents of γ- and α-tocopherol (3.5–4.2, and 18.2–21.5 µg g–1) were found in oils. Oleic (~ 60%), palmitic (9.9–18.9%), and linoleic (11.6–12.9%) were the major fatty acids. As a result, the main triacylglycerols were OOO (23.0–35.5 wt%), POO (13.4–31.3 wt%), and OLO (2.1–15.6 wt%). Thermal analysis revealed two major exothermic events during crystallization and a single peak on melting, also showing that gurguéia oils are liquid at 20 °C. Combining sustainable technologies was useful for valorizing residual biomass from hydraulic pressing to obtaining a high-quality oil with potential uses in the food, cosmetic and pharmaceutical industries. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index
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