Cuantificación de polifenoles y capacidad antioxidante en duraznos comercializados en Ciudad Juárez, México
Polyphenol and antioxidant capacity quantification in peaches commercialized in Ciudad Juarez, Mexico
DOI:
https://doi.org/10.54167/tch.v5i2.696Palabras clave:
Prunnus persica L, compuestos fenólicos, capacidad antioxidante, FRAP, ORACResumen
En el presente estudio se valoraron el contenido de fenoles totales (Folin-Ciocalteu), y capacidad antioxidante total (mediante las técnicas FRAP (poder antioxidante reductor del hierro) y ORAC (capacidad de absorción de radicales de oxígeno) en duraznos (Prunnus persica L.) de la variedad Prisco comercializados en Ciudad Juárez, procedentes de tres diferentes zonas de cultivo: dos en México, en los estados de Sonora y Chihuahua, y otra en el estado de California, Estados Unidos de América (EEUU). La concentración de fenoles totales, y capacidad antioxidante se determinaron a partir de extractos en metanol al 80%, según la metodología descrita por Kähkönen et al. (1999). Las muestras del estado de Sonora fueron las que presentaron valores más altos, tanto en fenoles libres (121 mg CAE/100g peso fresco) como en capacidad antioxidante (2.5 mmol Fe/100g mediante FRAP y 18.15 mmol TE/100 g peso fresco mediante ORAC). Se encontró una correlación significativa (P = 0.56) entre contenido de fenoles totales y capacidad antioxidante evaluada por la técnica FRAP. Esta correlación fue aún mayor en las muestras procedentes de California (P = 0.92). En general, las muestras de duraznos comercializadas en Ciudad Juárez mostraron una contribución adecuada de compuestos fenólicos y capacidad antioxidante a la dieta.
Abstract
Total phenolics content (Folin-Ciocalteu), and total antioxidant capacity (FRAP and ORAC, techniques) were evaluated in peaches Prisco variety (Prunnus persica L.) commercialized in Ciudad Juarez, which come from three different growing areas: two from Mexico, Sonora and Chihuahua states, and one from USA, California state. Total phenolics and antioxidant capacity were determined from methanol extracts at 80%. Samples from Sonora showed the highest values for phenolic content (121 mg CAE/100g fresh weight), and for antioxidant capacity (2.5 mmol Fe/100g by FRAP and 18.15 mmol TE/100 g fresh weight by ORAC). A meaningful correlation was found (P=0.56) between the total phenolic content and the antioxidant capacity evaluated by FRAP. This correlation was even highest in the samples from California (P=0.92). In general, all peach samples commercialized en Ciudad Juarez showed an appropriated contribution of phenolics and antioxidant capacity to the diet.
Keywords: Prunnus persica L., phenolics compounds, antioxidant capacity, FRAP, ORAC.
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