Abstract
Phenolic compounds from mango (M. indica) seed kernels (MSK) var. Sugar were obtained using supercritical CO2 and EtOH as an extraction solvent. For this purpose, a central composite design was carried out to evaluate the effect of extraction pressure (11–21 MPa), temperature (40–60 °C), and co-solvent contribution (5–15% w/w EtOH) on (i) extraction yield, (ii) oxidative stability (OS) of sunflower edible oil (SEO) with added extract using the Rancimat method, (iii) total phenolics content, (iv) total flavonoids content, and (v) DPPH radical assay. The most influential variable of the supercritical fluid extraction (SFE) process was the concentration of the co-solvent. The best OS of SEO was reached with the extract obtained at 21.0 MPa, 60 °C and 15% EtOH. Under these conditions, the extract increased the OS of SEO by up to 6.1 ± 0.2 h (OS of SEO without antioxidant, Control, was 3.5 h). The composition of the extract influenced the oxidative stability of the sunflower edible oil. By SFE it was possible to obtain extracts from mango seed kernels (MSK) var. Sugar that transfer OS to the SEO. These promissory extracts could be applied to foods and other products.
Highlights
Mango (Mangifera indica L.) is one of the most consumed fruits worldwide [1,2]
The maximum extraction yield for uSF under supercritical fluid extraction (SFE) (14.7%) was similar to those obtained by Jahurul et al [29], which reported values of up to 13.5% of fat extracted by supercritical CO2 from the kernel of six Molecules 2021, 26, 7516
Yield for uSF under SFE (14.7%) was similar to those obtained by Jahurul et al [29],3 of which reported values of up to 13.5% of fat extracted by supercritical CO2 from the kernel of six mango varieties from Malaysia [30]
Summary
In. Colombia, mango is among the most important permanent fruit crop, with a production of 325,000 t in 2019 [3]. The main by-products generated are epicarp (peel) and seed. These by-products represent around 35–60% of the fruit’s total weight. The seed can reach up to 75,000 t/year, becoming a source of contamination without any sustainable disposal at present. This agricultural by-product, especially the mango seed kernels (MSK), is considered, an important source of biomolecules that could be exploited [1,6,7,8,9,10]
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