Extraction of corn germ oil with supercritical CO 2 and cosolvents.

Autor: Marinho CM; Faculdade de Engenharia Química, Universidade Federal de Uberlândia, Av. João Naves de Ávila 2121 - Bloco 1K - Campus Santa Mônica, Uberlândia, MG CEP 38408-144 Brazil., Lemos COT; Faculdade de Engenharia Química, Universidade Federal de Uberlândia, Av. João Naves de Ávila 2121 - Bloco 1K - Campus Santa Mônica, Uberlândia, MG CEP 38408-144 Brazil., Arvelos S; Faculdade de Engenharia Química, Universidade Federal de Uberlândia, Av. João Naves de Ávila 2121 - Bloco 1K - Campus Santa Mônica, Uberlândia, MG CEP 38408-144 Brazil., de Souza Barrozo MA; Faculdade de Engenharia Química, Universidade Federal de Uberlândia, Av. João Naves de Ávila 2121 - Bloco 1K - Campus Santa Mônica, Uberlândia, MG CEP 38408-144 Brazil., Hori CE; Faculdade de Engenharia Química, Universidade Federal de Uberlândia, Av. João Naves de Ávila 2121 - Bloco 1K - Campus Santa Mônica, Uberlândia, MG CEP 38408-144 Brazil., Watanabe ÉO; Faculdade de Engenharia Química, Universidade Federal de Uberlândia, Av. João Naves de Ávila 2121 - Bloco 1K - Campus Santa Mônica, Uberlândia, MG CEP 38408-144 Brazil.
Jazyk: angličtina
Zdroj: Journal of food science and technology [J Food Sci Technol] 2019 Oct; Vol. 56 (10), pp. 4448-4456. Date of Electronic Publication: 2019 Jul 23.
DOI: 10.1007/s13197-019-03923-2
Abstrakt: The aim of this work was to investigate corn germ oil extraction using supercritical CO 2 and cosolvents addition (hexane, acetone and ethanol). The effects of temperature (45-85 °C) and pressure (15-25 MPa) on the extract yield were evaluated for the tests conducted only with supercritical CO 2 . The addition of cosolvents to supercritical CO 2 was also examined at 25 MPa and 60 °C. The conventional Soxhlet extraction with different organic solvents was also performed for comparison purposes. The results of extraction with supercritical fluid showed that the yields increased with pressure at each temperature, but decreased with temperature increase. Mathematical modeling was applied to describe extraction curves, with very good fits. The addition of cosolvents led to higher yield, with a maximum yield of 13.81% using ethanol. The analysis of fatty acids profile did not present significant differences among the evaluated methods. On the other hand, the antioxidant activity of the extracts obtained by supercritical CO 2 extraction was higher than the ones verified for the extracts collected after conventional Soxhlet extraction. Therefore, the use of supercritical CO 2 extraction could be an interesting way to preserve antioxidant properties of this oil in order to use it for pharmaceutical purposes.
(© Association of Food Scientists & Technologists (India) 2019.)
Databáze: MEDLINE
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