Phenylethyl isothiocyanate extracted from watercress by-products with aqueous micellar systems: development and optimisation

Ezequiel R. Coscueta*, Celso A. Reis, Manuela Pintado

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)
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Abstract

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 effective (ca. 2900 µg PEITC/g watercress), regardless of the surfactant used. The optimal extracts showed greater antioxidant capacity than pure PEITC, due to other antioxidant compounds extracted 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.
Original languageEnglish
Article number698
Pages (from-to)1-11
Number of pages11
JournalAntioxidants
Volume9
Issue number8
DOIs
Publication statusPublished - Aug 2020

Keywords

  • Aliphatic alcohol ethoxylates
  • Antioxidant activity
  • Aqueous micellar systems
  • Gastrocure
  • Optimisation
  • Phenylethyl isothiocyanate (PEITC)
  • Response surface methodology
  • Watercress by-products

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