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Pomegranate Seed Oil Nanoemulsion Enriched by Α-Tocopherol; the Effect of Environmental Stresses and Long-Term Storage on Its Physicochemical Properties and Oxidation Stability Publisher Pubmed



Sahafi SM1 ; Goli SAH1 ; Kadivar M1 ; Varshosaz J2 ; Shirvani A1
Authors
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Authors Affiliations
  1. 1. Department of Food Science and Technology, College of Agriculture, Isfahan University of Technology, Isfahan, 84156 83111, Iran
  2. 2. Isfahan Department of Pharmaceutics, Faculty of Pharmacy and Novel Drug Delivery Systems Research Center, Isfahan University of Medical Sciences, Isfahan, Iran

Source: Food Chemistry Published:2021


Abstract

In this study, pomegranate seed oil (PSO) nanoemulsions loading different amounts of α-tocopherol (0–40%) were produced. The nanoemulsions were fabricated by ultra-sonication method and the influence of thermal treatment (20–90 °C), pH (2–8) and ionic strength (0–500 mM NaCl) were investigated on physicochemical properties of all treatments. Moreover, the oxidative stability and α-tocopherol degradation were also assessed on optimal enriched nanoemulsion formulation during 50-day storage. The droplet diameter, viscosity, antioxidant activity, encapsulation efficiency and loading capacity of optimal formulation were 37.5 nm, 514 cp, 92%, 3.45% and 92.5%, respectively. The peroxide value changed in the range of 4.5–5.3 and 6.7–10.5 meq O2/kg in loaded and unloaded nanoemulsions, respectively. Transmission electron microscopy demonstrated spherical morphology of nanoemulsion droplets with diameter average of 40 nm. This study suggested that PSO nanoemulsion loading α-tocopherol could be introduced as delivery system with favorable features under severe environmental conditions. © 2020 Elsevier Ltd
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