Estabilidad de aceites de salvado de arroz obtenidos mediante SFE y Soxhlet durante su vida útil en almacenamiento acelerado
DOI:
https://doi.org/10.3989/gya.109413Palabras clave:
Aceite de salvado de arroz, Caducidad, Estabilidad, Fluido supercrítico, Oryzanol, Soxhlet, TocoferolResumen
Se realizaron extracciones mediante fluido supercrítico de salvado de arroz con alto (SFE HO) y bajo (SFE LO) contenido en orizanol y se comparó con los extraídos mediante Soxhlet (SOX). Se determinó la composición y la estabilidad durante el almacenamiento. La materia insaponificable y el gamma orizanol de las muestras SFE fueron significativamente más altas (p < 0,05) que SOX. Mientras la cantidad de tocoferol en SOX (4,0 mg·g-1) fue mayor que lo encontrado para SFE HO y SFE LO, 3,2 y 2,6 mg·g-1 respectivamente. Después de 42 días de almacenamiento a 70 °C los valores de PV, FFA %, dienos conjugados y p-anisidina de SOX fueron mayores que los de SFE HO, y SFE LO. Las muestras SFE mostraron mejor estabilidad que SOX bajo calentamiento y la adición de BHA disminuyó el PV, FFA %, dienos conjugados y los niveles de p-anisidina en todas las muestras.
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