Optimization of Thermoultrasound Extraction of Antioxidants Compounds from Waste of Mango (Mangifera Indica L.), Using Response Surface Methodology

Abstract

The aim of this research was to optimize the conditions for obtaining a better yield antioxidant compounds from mango waste, a 1500 W ultrasonic processor was used for sonication, at a constant frequency of 20 kHz with amplitude that ranged from 80-90% and time 5-15 min. Later it was performed quantifying antioxidant compounds (total phenols 8837.68 mgGAE/100g db, ascorbic acid 5730.67 mg AAE/100g db), and the antioxidant activity (DPPH• 60080 µM TE/100g db, ABTS•+ 76618 µM ET/100g db). Data were analyzed using response surface methodology (MSR) for optimum extraction conditions. Finally a comparison of the functional properties of the extracts under thermo-ultrasound with respect to aqueous and hydroalcoholic extraction of antioxidant compounds was performed.
The optimal values of selected variables, for obtaining antioxidant components were 91% amplitude and time of 7 minutes. It is noteworthy that the thermoultrasound extraction proved the best option for extracting antioxidants components from waste of mango compared with conventional methods, which would represent an advantage for the food industry as a sustainable alternative to the use of sub-products of mango.