Extractos de hojas de olivo de Chétoui: Influencia del tipo de disolventes sobre los compuestos fenólicos y su actividad antioxidante

Autores/as

  • Leila Abaza Laboratoire Caractérisation et Qualité de l’Huile d’Olive, Centre de Biotechnologie, Technopole de Borj-Cédria
  • Nabil Ben Youssef Laboratoire Caractérisation et Qualité de l’Huile d’Olive, Centre de Biotechnologie, Technopole de Borj-Cédria
  • Hédia Manai Laboratoire Caractérisation et Qualité de l’Huile d’Olive, Centre de Biotechnologie, Technopole de Borj-Cédria
  • Faouzia Mahjoub Haddada Laboratoire Caractérisation et Qualité de l’Huile d’Olive, Centre de Biotechnologie, Technopole de Borj-Cédria
  • Kaouther Methenni Laboratoire Caractérisation et Qualité de l’Huile d’Olive, Centre de Biotechnologie, Technopole de Borj-Cédria
  • Mokhtar Zarrouk Laboratoire Caractérisation et Qualité de l’Huile d’Olive, Centre de Biotechnologie, Technopole de Borj-Cédria

DOI:

https://doi.org/10.3989/gya.044710

Palabras clave:

Actividades antioxidantes, Disolvente de extracción, Fenoles, Flavonoides, Hojas de olivo

Resumen


El objetivo de este trabajo fue estudiar la influencia del disolvente usado en la extracción de los compuestos fenólicos y en las propiedades antioxidantes de los extractos obtenidos a partir de hojas de olivo procedente de la variedad Chétoui. La extracción se realizó a temperatura ambiente, usando cuatro disolventes: agua desionizada(ddH2O), metanol 80% (80% MeOH) , etanol 70% (70% EtOH), y acetona 80%. Los fenoles totales y los flavonoides totales se midieron usando los métodos colorimétricos con Folin-Ciocalteau y cloruro de aluminio, respectivamente. Las propiedades antioxidantes han sido determinadas por dos métodos: el DPPH y el ABTS. El contenido de fenoles totales y flavonoides de los extractos de hojas de olivo (OLEs) varió desde 16,52 hasta 24,93 mg de ácido gálico g–1 de materia seca y desde 6,23 hasta 21,47 mg de catequina g–1 de materia seca, respectivamente. Los valores de IC50 de DPPH varian de 0,17 a 0,97 mg mL–1 y los valores de la actividad antioxidante determinados por ABTS (capacidad antioxidante en equivalentes de trolox) se encuentran entre 629,87 y 1064,25 μmol TE g–1 de materia seca, respectivamente. Nuestros resultados revelaron que los disolventes de extracción tienen una influencia significativa en las propiedades antioxidantes de los extractos de hojas de oliva. El metanol se recomienda para los extractos con alto nivel de flavonoides y con actividades antioxidantes importantes. Además, se observó que la capacidad antioxidante en equivalente de trolox (TEAC) depende más de los flavonoides (r = 0,821) que de los fenoles totales (r = 0.399).

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Citas

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Publicado

2011-03-30

Cómo citar

1.
Abaza L, Ben Youssef N, Manai H, Mahjoub Haddada F, Methenni K, Zarrouk M. Extractos de hojas de olivo de Chétoui: Influencia del tipo de disolventes sobre los compuestos fenólicos y su actividad antioxidante. Grasas aceites [Internet]. 30 de marzo de 2011 [citado 23 de julio de 2024];62(1):96-104. Disponible en: https://grasasyaceites.revistas.csic.es/index.php/grasasyaceites/article/view/1305

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Investigación