Abstract
The effects of tocopherol and chlorogenic acid on the oxidation stability and bioaccessibility of algal oil emulsion were investigated. The results showed that the compound antioxidant (300 ppm tocopherol + 200 ppm chlorogenic acid) could effectively inhibit the oxidation of algal oil emulsion. Based on the changes in antioxidant content during storage and their distribution at the interface, it is speculated that the interaction mechanism between tocopherol and chlorogenic acid is that chlorogenic acid promotes the regeneration of tocopherol and alters their distribution at the interface through their interaction. The calculation result of FMO showed that the ΔE of chlorogenic acid (4.0456 eV) is smaller than that of α-tocopherol (6.4823 eV), indicating a stronger electron-donating capacity, which further validated the mechanism of the interaction between tocopherol and chlorogenic acid. The compound antioxidant had no significant effect on the physical stability of the emulsion, and was conducive to improving the bioaccessibility of DHA. These findings provide direction for the design of high oxidation stability functional emulsion systems and valuable ideas for the creation of natural antioxidant combinations.
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