大豆油の自動酸化に及ぼす溶存水の影響について
1992 年 41 巻 6 号 p. 485-488
詳細
1992 年 41 巻 6 号 p. 485-488
The autoxidation reaction of soybean oils containing dissolved water at 20 to 990 ppm was investigated for various reaction periods (70, 110 and 220 h) at 50°C in oxygen. The autoxidation of the soybean oil was accelerated by dissolved water in oil.
For the autoxidation of oils containing 20 ppm dissolved water, POV increased gradually to 4.9 (70 h) with reaction time, and rapidly up to 32.1 (220 h). Total POV (amount of hydroperoxide decomposed during the reaction plus observed POV) increased from 6.2 (70 h) to 37.1 (220 h).
POV of oil containing 110990 ppm dissolved water was 0.81.2 times (POV 4.06.1, 70 h) and 1.51.6 times (POV 49.952.2, 220 h) that of 20 ppm dissolved water. Total POV was 1.41.9 times (total POV 8.511.6, 70 h) and 1.44.6 times (total POV 52.258.5, 220 h) that of 20 ppm dissolved water.
The percentage of decomposed hydroperoxide to that of hydroperoxide was calculated and found highest (2166 %) at 70 h and lowest (513 %) at 220 h.
