Kinetics of Oxidation of Different Depths of Methyl Linoleate in Bulk Phase

Abstract

Bulk methyl linoleate was oxidized at 65°C and essentially 0% relative humidity to quantitatively evaluate the effect of the depth of the layer (i.e., the amount) of methyl linoleate on its oxidation kinetics. Oxidation was retarded when the thickness was greater than 1 mm or the volume was greater than 10 µL, and barely occurred at thicknesses greater than 5 mm. Oxidation behavior was also evaluated under a limited range of oxygen partial pressures (0.2 – 10 kPa). The saturation constant of oxygen for oxidation was estimated to be 1.23 kPa, which is significantly lower than the partial pressure of oxygen in air at atmospheric pressure.