11‐selenadodecylglyceryl‐1‐ether in lipid autoxidation

Abstract

AbstractThe effect of 11‐selenadodecylglyceryl‐1‐ether (11‐SeDGE) at concentrations of 5 × 10−4 and 1 × 10−2 M on the autoxidation of sunflower oil with a natural content of 0.06% tocopherols at 100°C and at room temperature in the dark and of pure triacylglycerols of sunflower oil (TGSO) at 100°C was studied. The process was followed by peroxide concentration (peroxide value) determination and by ultraviolet (UV) spectroscopy. It was found that 11‐SeDGE acted synergistically with the tocopherols in sunflower oil in a dose‐dependent manner to delay oxidation at 100°C. The results from the UV spectra indicated that 11‐SeDGE decomposed the initiators of the process, the hydroperoxides, into inactive products. During oxidation of pure TGSO (i.e, depleted of tocopherols) at 100°C, 11‐SeDGE retarded the process without a pronounced induction period. At room temperature, 11‐SeDGE showed a slight prooxidative effect on sunflower oil oxidation. Taking into account the established prooxidative effect of the two hydroxy groups in a molecule such as 11‐SeDGE, it was recommended to study the lipid autoxidation in the presence of selenium compounds that do not contain such prooxidative groups.