title: Variation Quality and Kinetic Parameter of Commercial n-3 PUFA-Rich Oil during Oxidation via Rancimat.
abstract: Different biological sources ofn-3 polyunsaturated fatty acids (n-3 PUFA) in mainstream commercial products include algae and fish. Lipid oxidation inn-3 PUFA-rich oil is the most important cause of its deterioration. We investigated the kinetic parameters ofn-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 withn-3 PUFA-rich oil was evident because of decreased levels of PUFA along with increased levels of saturated fatty acids (SFA). The quality deterioration fromn-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.
authors.affiliation: Department of Food Science and Biotechnology, National Chung Hsing University, 250 Kuokuang Road, Taichung 40227, Taiwan. a9241128@gamil.com.
authors.forename: Kai-Min
authors.initials: KM
authors.lastname: Yang
authors.affiliation: Department of Food Science and Biotechnology, National Chung Hsing University, 250 Kuokuang Road, Taichung 40227, Taiwan. pychiang@nchu.edu.tw.
authors.forename: Po-Yuan
authors.initials: PY
authors.lastname: Chiang
mesh_terms: D000818:Animals; D015525:Fatty Acids, Omega-3 / Q000737:chemistry* / Q000378:metabolism*; D005395:Fish Oils / Q000737:chemistry* / Q000378:metabolism*; D007700:Kinetics; D050356:Lipid Metabolism / Q000502:physiology; D010084:Oxidation-Reduction; D010473:Perciformes / Q000378:metabolism
chemical_list: D015525:Fatty Acids, Omega-3; D005395:Fish Oils
keywords: Rancimat test; kinetic parameter; n-3 PUFA; oxidative stability index