Effect of Hot Pepper Seed Oil, Capsaicin, and Alpha-Tocopherol on Thermal Oxidative Stability in Lard and Soy Bean Oil

This study was designed to compare the thermal oxidative stability of lard, soy bean oil, and hot pepper seed oil for 0-3 d at 100 degrees C, and to evaluate the effect of capsaicin on thermal oxidative stability in lard and soy bean oil. As result thermal oxidation stability was shown in the order hot pepper seed oil>soy bean oil>lard for 0-3 d at 100 degrees C. In blended oils, hot pepper seed oil effectively inhibited lipid oxidation when mixed with lard than soy bean oil by showing the ratio of 30% pepper seed oil Plus 70% lard and 60% pepper seed oil plus 40% soy bean oil inhibited lipid oxidation during storage periods. And to investigate the antioxidative effect of antioxidants Such as capsaicin and alpha-tocopherol in hot pepper seed oil, 1,200 and 2,400 ppm capsaicin, or 0.3% alpha-tocopherol were added in soy bean oil and lard and stroed for 0-3 d at 100 degrees C. Capsaicin inhibited lipid oxidation in lard but not in soy bean oil, however alpha-tocopherol exhibited a prooxidaton effect in soybean oil. Therefore. it suggests that the application of hot pepper seed oil or capsaicin in lard may be better for thermal oxidative stability.