Ultrasound‐microwave‐assisted extraction of polyphenolic compounds from Mexican “Ataulfo” mango peels: Antioxidant potential and identification by HPLC/ESI/MS

Abstract

Introduction: Mango is used in traditional medicine in many countries. However, the processing by-products are not currently used and generate large pollution problems and high handling costs.Objective: To study the effect of different parameters in the extraction of polyphenolic compounds from mango peels using modern and ecological ultrasound-microwave-assisted extraction technology.Methodology: Various parameters of these processes were studied: the extract was recovered by liquid chromatography using Ambetlite XAD-16. The total polyphenol content was determined by Folin-Ciocalteu's and HCl-butanol methods. Antioxidant activity was determined by 2,2 0 -azino-bis (3-ethylbenzothiazoline-6-sulphonic acid (ABTS+), 1,10-diphenyl-2-20-picrylhydrazyl (DPPH), and lipid oxidation inhibition methods. The recovered compounds were identified by high-performance liquid chromatography-mass spectrometry (HPLC-MS).Results: The best extraction conditions were solid/liquid ratio of 1/5 g/mL, ethanol percentage of 50%, and an extraction time of 10 min. Under these conditions, the total polyphenol content was 54.15 mg/g, and the antioxidant activities were greater than 90% inhibition in the three assays evaluated. According to the high-performance liquid chromatography/electrospray ionization/mass spectrometry (HPLC/ESI/MS) analysis, nine polyphenolic compounds were identified; most of them were gallotannins, such as pentagalloyl glucose. Conclusion:Ultrasound-microwave-assisted extraction was shown to be effective and allowed the recovery of antioxidant polyphenolic compounds. The results indicated that mango peel extracts can be used as natural antioxidant components in the pharmaceutical and functional food industries.Anahi Ordoñez-Torres and Cristian Torres-León contributed equally to this work.

Bioprocessing of pineapple waste biomass for sustainable production of bioactive compounds with high antioxidant activity

“…The highest value (83.77 mg GAE/g d.w) for the total phenolic content (TPC) was provided at a temperature of 36 °C, pH 6 and 80% moisture content. The values of condensed polyphenols (66.5 mg QE/g) determined in this study were much higher than those previously determined by Ordoñez-Torres et al [53] in samples of mango peel subjected to ultrasound (18.21 mg QE/g) and by García et al [54] in Ataulfo mango peel (3.7 mg QE/g). It was also possible to conclude that the value of condensed tannins was higher in the fermented sample than in the control sample (40.32 mg QE/g).…”

Recovery of Bioactive Ellagitannins by Ultrasound/Microwave-Assisted Extraction from Mexican Rambutan Peel (Nephelium lappaceum L.)

“…The polyphenolic content found in the hybrid extraction of the Mexican rambutan peel proved to be greater than that found in other tropical fruits, such as mango Ataulfo peel, where 35.93 mg/g of hydrolyzable and 18.21 mg/g of condensed polyphenols were found. In a study, by Ordoñez-Torres et al [ 23 ], extractions were also performed by hybrid extraction technology, resulting in an improved extraction yield compared to results obtained by conventional technologies.…”

“…Hybrid extraction technologies have been used previously in the extraction of phenolic compounds from fruit peels such as mango. In a study, carried out by Ordoñez-Torres et al, 54.15 mg/g of total polyphenolic content was obtained [ 23 ]. Another study established that Mexican rambutan peel extraction by hybrid technology [ 24 ] obtained a total of 334.1 mg/g of polyphenolic content, suggesting a great potential in future applications.…”

Comparison between Ultrasonic Bath and Sonotrode Extraction of Phenolic Compounds from Mango Peel By-Products

“…In addition, in other investigations, new technologies were used such as ultrasound/ microwave-assisted extraction, microwave-assisted extraction [14,32], microwave-assisted extraction with deep eutectic solvents [33], supercritical CO 2 extraction [34], and sequential extraction steps [15].…”