Issue 9, 2021
From the journal:

RSC Advances

Screening of highly effective mixed natural antioxidants to improve the oxidative stability of microalgal DHA-rich oil

Fengwei Yin,a   Xiaolong Sun,a   Weilong Zheng,a   Xi Luo,a   Yingying Zhang,a   Longfei Yin,a   Qiang Jiab  and  Yongqian Fu ORCID logo *a  

* Corresponding authors

a Institute of Biomass Resources, Taizhou University, No. 1139 Shifu Road, Taizhou 318000, People's Republic of China
E-mail: bioengineer@163.com

b Seasons Biotechnology (Taizhou) Co., Ltd, Taizhou, People's Republic of China

Abstract

Docosahexaenoic acid (DHA)-rich oil sourced from microalgae can easily become oxidized. The objective of this work was to screen the optimal natural antioxidant mixture for protecting DHA-rich oil. Different natural antioxidants, encompassing tea polyphenols, natural vitamin E, rosemary extract, licorice root antioxidant, ascorbyl palmitate and lecithin were tested individually and in combination in an accelerated oxidation process. Three antioxidants namely natural vitamin E, rosemary extract and ascorbyl palmitate with synergistic effects were chosen, and their concentrations were further optimized using response-surface methodology. The highest antioxidants activity of 16.1740 was obtained with a combination of 0.0224% vitamin E, 0.0259% rosemary extract and 0.0166% ascorbyl palmitate, which prolonged the time until oxidation induction to 20.21 days. The mixed natural antioxidants showed a similar antioxidant effect to 0.02% tert-butylhydroquinone and was better than 0.02% butylated hydroxyanisole. These data indicate that the mixed natural antioxidants optimized in this work can be directly applied in the protection of commercial microalgal DHA-rich oil.

Graphical abstract: Screening of highly effective mixed natural antioxidants to improve the oxidative stability of microalgal DHA-rich oil

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Article information

DOI
https://doi.org/10.1039/D0RA10312H
Article type
Paper
Submitted
07 Dec 2020
Accepted
19 Jan 2021
First published
27 Jan 2021
This article is Open Access
Creative Commons BY-NC license

RSC Adv., 2021,11, 4991-4999

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Screening of highly effective mixed natural antioxidants to improve the oxidative stability of microalgal DHA-rich oil

F. Yin, X. Sun, W. Zheng, X. Luo, Y. Zhang, L. Yin, Q. Jia and Y. Fu, RSC Adv., 2021, 11, 4991 DOI: 10.1039/D0RA10312H

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