Kinetic studies of oxygen dependence during initial lipid oxidation in rapeseed oil

Lipid oxidation was studied in rapeseed oil, stored at 35 or 50 degrees C in 0.03, 0.3, 1.0 or 1.8% oxygen for 42 days. Peroxide value (PV), oxygen consumption, tocopherol consumption end production of volatile compounds were analyzed to follow the oxidation, At 50 degrees C, lipid oxidation measured as oxygen consumption or PV was only slightly influenced by oxygen concentration greater than or equal to 1%. Below 0.5% the influence was strongly enhanced. The production of volatiles showed different relationships to oxygen concentration and some compounds were produced in larger amounts at lower O(2), than at higher O(2) concentrations.