1986 年 35 巻 7 号 p. 549-553
A comparison of the oxidation rates of randomized and non-randomized triglycerides (TG) of soybean oil was made by oxygen absorption techniques and peroxide value determinations. The randomized TG was found to undergo more rapid oxidation than the non-randomized TG. Molecular species of the randomized TG, therefore, were analyzed and compared with those of non-randomized TG, since the increase in oxidation rate may possibly be due to change in the molecular species of TG caused by randomizing. The results obtained indicated that, on randomizing, the content of molecular species such as LPL, LPLn, and LSL each having a saturated fatty acid linked at the 2-position of glycerol increased, while those such as OLL, OLO, and OLP having a linoleic acid linked at the 2-position decreased.
These results suggest that TG having unsaturated fatty acids linked at 2-position, resulting in an increased oxidation rate of randomized TG.