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Advisor(s)
Abstract(s)
Phenylethyl isothiocyanate (PEITC) was reported as a useful antioxidant, anti-inflammatory, and chemopreventive agent. Due to technological and stability issues, it is necessary to be able to extract PEITC from its natural matrix (watercress) through sustainable and scalable methodologies. In this article, we explored, for the first time, the extractive capacity of aqueous micellar systems (AMSs) of two non-ionic surfactants. For this, we compared the AMSs with conventional organic solvents. Furthermore, we developed and optimised a new integral PEITC production and extraction process by a multifactorial experimental design. Finally, we analysed the antioxidant capacity by the oxygen radical absorbance capacity (ORAC) and ABTS methods. As results, the AMSs were able to extract PEITC at the same level as the tested conventional solvents. In addition, we optimised by response surface methodology the integrated process (2.0% m/m, 25.0 C, pH 9.0), which was equally efective (ca. 2900 g PEITC/g watercress), regardless of the surfactant used. The optimal extracts showed greater antioxidant capacity than pure PEITC, due to other antioxidant compounds extracte in the process. In conclusion, by the present work, we developed an innovative cost-effective and low environmental impact process for obtaining PEITC extracts from watercress by-products.
Description
Keywords
Phenylethyl isothiocyanate (PEITC) Aqueous micellar systems Aliphatic alcohol ethoxylates Watercress by-products Response surface methodology Optimisation Antioxidant activity Gastrocure
Pedagogical Context
Citation
Coscueta, E.R., Reis, C.A., Pintado, M. (2020). Phenylethyl isothiocyanate extracted from watercress by-products with aqueous micellar systems: development and optimisation. Antioxidants, 9(8), art. 698
Publisher
MDPI