Eficiencia de la extracción asistida por ultrasonido de pétalos de Delonix regia como antioxidante natural en la estabilidad oxidativa del aceite de girasol
DOI:
https://doi.org/10.3989/gya.0929182Palabras clave:
Aceite de girasol, Carotenoides, Delonix regia, Estabilidad oxidativa, UltrasonidoResumen
Se estudió la posibilidad de mejorar la estabilidad oxidativa del aceite de girasol enriqueciéndolo con carotenoides de pétalos de Delonix regia. Se utilizaron técnicas combinadas de extracción asistida por ultrasonido y técnicas de agitación. Las condiciones óptimas fueron una relación material/ disolvente de 1:20 (p/v), una potencia ultrasónica de 30 W y un tiempo de extracción de 50 min. En estas condiciones, el rendimiento de carotenoides totales fue de 503,0 ?g/g de peso seco. El aumento de la densidad de potencia acústica degrada a los carotenoides. El análisis por HPLC se utilizó para la cuantificación de β-caroteno en el extracto. Se encontró que la actividad de captación de radicales DPPH y el poder antioxidante reductor férrico del extracto rico en carotenoides es superior al del butilhidroxitolueno estándar (BHT). El enriquecimiento de aceite de girasol con extracto rico en carotenoides a 67,46 mg de carotenoides/kg de aceite mejoró su estabilidad oxidativa en más del 50% según lo medido por el método de Rancimat. Estos resultados proponen que el extracto investigado tiene el potencial de ser utilizado como conservante biológico en productos alimenticios.
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