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        Study of α-, γ-, and δ-Tocopherols in the Oxidative Stability of Lard

        Robert E. King,David B. Min,민세철 한국식품과학회 2011 Food Science and Biotechnology Vol.20 No.3

        Effects of α-, γ-, and δ-tocopherols at 0, 50,100, 250, 500, and 1,000 ppm on the oxidative stability of lard during storage in the dark at 55oC for 7 days were studied by determining headspace oxygen content and peroxide value. The headspace oxygen content of the lard without tocopherol addition decreased from 21.1 to 14.4%and the peroxide value increased from 2.5 to 15.4 meq/kg lard for 7 days. The headspace oxygen depletion and the peroxide value of lard decreased by the addition of α-tocopherol at 50 ppm, but significantly increased at 250,500, or 1,000 ppm. As the concentration of γ-tocopherol or δ-tocopherol increased, the headspace oxygen depletion and the peroxide value decreased. α-Tocopherol at 250ppm acted as a prooxidant in the autoxidation of lard. The concentrations of γ- or δ-tocopherol to be applied to improve the autoxidative stability of lard may be 100-250ppm.

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