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Mar. Drugs 2017, 15(4), 97; doi:10.3390/md15040097

Variation Quality and Kinetic Parameter of Commercial n-3 PUFA-Rich Oil during Oxidation via Rancimat

Department of Food Science and Biotechnology, National Chung Hsing University, 250 Kuokuang Road, Taichung 40227, Taiwan
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Author to whom correspondence should be addressed.
Academic Editors: Rosário Domingues, Ricardo Calado and Pedro Domingues
Received: 13 January 2017 / Revised: 17 March 2017 / Accepted: 20 March 2017 / Published: 28 March 2017
(This article belongs to the Special Issue Marine Lipids 2017)
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Abstract

Different biological sources of n-3 polyunsaturated fatty acids (n-3 PUFA) in mainstream commercial products include algae and fish. Lipid oxidation in n-3 PUFA-rich oil is the most important cause of its deterioration. We investigated the kinetic parameters of n-3 PUFA-rich oil during oxidation via Rancimat (at a temperature range of 70~100 °C). This was done on the basis of the Arrhenius equation, which indicates that the activation energies (Ea) for oxidative stability are 82.84–96.98 KJ/mol. The chemical substrates of different oxidative levels resulting from oxidation via Rancimat at 80 °C were evaluated. At the initiation of oxidation, the tocopherols in the oil degraded very quickly, resulting in diminished protection against further oxidation. Then, the degradation of the fatty acids with n-3 PUFA-rich oil was evident because of decreased levels of PUFA along with increased levels of saturated fatty acids (SFA). The quality deterioration from n-3 PUFA-rich oil at the various oxidative levels was analyzed chemometrically. The anisidine value (p-AV, r: 0.92) and total oxidation value (TOTOX, r: 0.91) exhibited a good linear relationship in a principal component analysis (PCA), while oxidative change and a significant quality change to the induction period (IP) were detected through an agglomerative hierarchical cluster (AHC) analysis. View Full-Text
Keywords: n-3 PUFA; oxidative stability index; Rancimat test; kinetic parameter n-3 PUFA; oxidative stability index; Rancimat test; kinetic parameter
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MDPI and ACS Style

Yang, K.-M.; Chiang, P.-Y. Variation Quality and Kinetic Parameter of Commercial n-3 PUFA-Rich Oil during Oxidation via Rancimat. Mar. Drugs 2017, 15, 97.

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