2023 Volume 29 Issue 6 Pages 481-488
Lipid oxidation in food can result in the generation of off-odor compounds. We investigated the combined effects of α-tocopherol with rosmarinic acid and various antioxidants on the prevention and inhibition of off-odor formation. We added these combined compounds in a linoleic acid emulsion, followed by an oxidation reaction with 2′2-Azobis (2-methylpropionamidine) Dihydrochloride at 37 °C for 5 h. The hydroperoxide was measured by the ferric thiocyanate method, and the off-odor components were measured by gas chromatography. Median effect analysis was used to assess the combined effects. The results showed that the combinations of α-tocopherol with rosmarinic acid and caffeic acid exhibited a synergistic effect on inhibition of lipid peroxidation and some off-odor components, likely attributable to the catechol structure in these compounds. Interestingly, the combination of α-tocopherol and rosmarinic acid showed a potent synergistic effect on (E)-2-nonenal and (E)-2-octenal, indicating that the formation process of off-odor components may influence the combined effect.
