Método 19F RMN para determinar la calidad del aceite de oliva virgen

Autores/as

  • L. L. Zhou School of Environmental and Chemical Engineering
  • C. Li School of Environmental and Chemical Engineering
  • X. C. Weng School of Environmental and Chemical Engineering
  • X. M. Fang Shanghai Entry-Exit Inspection Quarantine Bureau
  • Z. H. Gu Shanghai Food Security Officce

DOI:

https://doi.org/10.3989/gya.0242151

Palabras clave:

Alcoholes, Calidad del aceite de oliva, Cloruro de 4-Fluorobenzoil, Diglicéridos, 19F NMR

Resumen


En este trabajo se describe una técnica analítica basada en la espectroscopía de RMN para determinar la calidad del aceite de oliva. Los compuestos modelo con hidrógeno activo, incluyendo esteroles libres, alcoholes alifáticos libres, compuestos fenólicos, ácidos grasos libres se determinaron por 19F RMN derivatizados con cloruro de 4-fluorobenzoilo. La integración de las señales apropiadas de los derivados de los compuestos en el correspondiente espectro de 19F RMN permite la cuantificación de estos compuestos. 37 muestras de aceites de oliva comerciales y 5 muestras de otros aceites vegetales se determinaron por 19F RMN. La cantidad de diglicéridos y la proporción de los 1,2-diglicéridos a la cantidad total de diglicéridos se analizaron para monitorizar si el aceite de oliva virgen extra fue adulterado con aceite de oliva de bajo precio y otros aceites vegetales o no. Los resultados mostraron que el contenido de diglicéridos totales no debe ser superior a 2,5% y la relación (D) de 1,2-diglicéridos a diglicéridos totales debe ser superior a 0,35 para el aceite de oliva virgen extra. Este método es una técnica más simple, segura, fácil, rápida y más fiable para la determinación de la calidad del aceite de oliva y también se puede extender para monitorizar la calidad de los aceites comestibles ordinarios.

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Citas

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Publicado

2015-12-30

Cómo citar

1.
Zhou LL, Li C, Weng XC, Fang XM, Gu ZH. Método 19F RMN para determinar la calidad del aceite de oliva virgen. Grasas aceites [Internet]. 30 de diciembre de 2015 [citado 28 de julio de 2026];66(4):e106. Disponible en: https://grasasyaceites.revistas.csic.es/index.php/grasasyaceites/article/view/1572

Número

Sección

Investigación