Potential antioxidant effect of fruit peels for human use from northern Peru, compared by 5 different methods

Abstract

The objective of the work was to determine the antioxidant potential in vitro of freeze-dried peel extracts of 20 fruits from the northern region of Peru through five tests (Folin-Ciocalteu, DPPH., ABTS+., FRAP and CUPRAC). According to multivariate statistical analyzes, five groups were found: (i.) peel extracts with the highest values of antioxidant capacity (AC) from custard apple, and star fruit; (ii.) rind extracts with high AC values from quince, sweet granadilla, guava, and black grape; (iii.) husk extracts with middle values of AC from passion fruit, and red mombin; (iv.) shell extracts with low AC values from tangerine, mandarine, and bitter orange; and, (v.) coating extracts with the lowest AC values from pawpaw, red pawpaw, muskmelon, dragon fruit, yellow and red indian figs, pear, apple, and green grape. To conclude, the fruit lyophilized-husk extracts of custard apple, star fruit, quince, sweet granadilla, guava, and black grape obtained the best AC.

Chemical composition and antioxidant capacity of purified extracts of Prosopis pallida(Humb. & Bonpl. ex Willd.) Kunth (Fabaceae) fruits from Northern Peru

“…Then 25 µL was taken Boletín Latinoamericano y del Caribe de Plantas Medicinales y Aromáticas / 596 and proceeded in the same way as in standard dissolutions. The values were expressed as equivalents of gallic acid per g of lyophilized extract (GAE/g), measurements were made in triplicate (Alarcón-Aguilar et al, 2018;Ganoza-Yupanqui et al, 2021).…”

“…After, the extracts were prepared at 10 mg/mL and measured under the same conditions. The tests were carried out in triplicate and expressed in mg of Trolox equivalents per gram of purified extract (mg TE/g) (Re et al, 1999;Seeram et al, 2006;Ganoza-Yupanqui et al, 2021). The correlation with total phenolic content was made through the determination of Pearson's coefficient.…”