Effects of chitosan and collagen containing α-tocopherol on the oxidative stability in bulk oil and oil-in-water emulsion

초록

To provide efficient antioxidant capacities, proper carriers are needed to protect antioxidants against oxidative stress. Collagen mesh structure or chitosan gel was loaded with alpha-tocopherol and their effects were evaluated in bulk corn oil or oil-in-water (O/W) emulsion at 60 A degrees C. Added collagen and chitosan enhanced oxidative stability in corn oil and O/W emulsions at 60 A degrees C compared to corn oils without carriers or with addition of alpha-tocopherol (p < 0.05). Stability of alpha-tocopherol in corn oil loaded in collagen or chitosan was significantly enhanced compared to that in oils without carriers (p < 0.05). In O/W emulsions, alpha-tocopherol loaded collagen showed higher antioxidant properties than alpha-tocopherol loaded chitosan (p < 0.05). Collagen mesh structure and chitosan gel retarded the rates of lipid oxidation efficiently in both food matrices when alpha-tocopherol was not loaded. Collagen mesh structure and chitosan gel can be useful carriers for alpha-tocopherol in bulk oil or O/W emulsion.

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