Ultrasound extraction conditions effect on antioxidant capacity of mango by-product extracts

Phenolic compounds are bioactive compounds that can be used in food preservation. During this experiment, phenolic compounds were extracted from 'Haden' mango seed and peel flour using ultrasound-assisted extraction (UAE). The results demonstrated high efficiency of the UAE for obtaining phenolic compounds in seed (121.66 +/- 4.94 mg GAE/g DM), and peel (112.90 +/- 3.70 94 mg GAE/g). For seed extracts the antioxidant activity ranged from 64.04 to 514.50 mg TE/g for DPPH, 297 to 1051.87 mg TE/g for ABTS, and 24 to 685.96 mg TE/g DM in the ability to reduce Fe3+ ion. In the case of peels, values of ABTS ranged from 239.13 to 1155.83 mg TE/g, DPPH ranged from 65.86 to 249.30 mg TE/g, and FRAP ranged from 7.11 to 100.89 mg TE/g. In the specific case of ABTS, the extracts could stabilize the ABTS and DPPH radicals and reduce Fe3+. The antiradical activity of the extracts suggests that peels may have a higher concentration of hydrophobic compounds that efficiently stabilize the ABTS radical, but that do not have a great effect against the DPPH radical and the Fe3+. Variations in the solvent concentration and the solvent-solid ratio generate changes in antioxidant capacity evaluated by different methods. (C) 2021 Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved.