Mangas das variedades espada, rosa e tommy atkins: compostos bioativos e potencial antioxidante / Mango varieties "espada", "rosa" and tommy atkins: bioactive compounds and antioxidant potential

RESUMO

O objetivo deste trabalho foi quantificar o teor de ácido ascórbico, carotenóides e fenólicos totais e avaliar o potencial antioxidante de mangas das variedades Espada, Rosa e Tommy Atkins. As frutas foram desintegradas para obtenção da polpa, os resíduos resultantes desidratados, triturados e tamisados. Extratos hidroacetônico, hidrometanólico e aquoso, obtidos por processo de extração sequencial a partir da polpa fresca e do resíduo desidratado foram submetidos à determinação da capacidade de seqüestro do radical DPPH. A manga Espada e a Tommy Atkins apresentaram teor de carotenóides totais semelhante entre si, porém inferior ao da manga Rosa. A manga Tommy Atkins exibiu o menor teor de ácido ascórbico e a Espada o maior teor de fenólicos totais. O extrato hidroacetônico da polpa e do resíduo exibiu uma forte capacidade de seqüestro (superior a 80%).

ABSTRACT

The aim of this work was to determine the amount of ascorbic acid, total phenolics and carotenoids and evaluate the antioxidant potential of mango varieties "Espada", "Rosa" and Tommy Atkins. The fruits were ground to obtain the fresh pulp and waste resulting was dried, crushed to pass through sieve. Hydroacetone, hydromethanolic and aqueous extracts, obtained through sequential extraction procedure from pulp and dehydrated waste were screened for their antioxidant activity by DPPH free radical scavenging. The "espada" and Tommy Atkins mango showed similar levels of total carotenoids, however less than Rosa mango. The Tommy Atkins mango exhibited the lowest content of ascorbic acid and the espada mango the highest level of phenolic compounds. The extract hydroacetone (pulp and dehydrated waste) exhibited a strong free radical scavenging capacity ( > 80%).