Inhibited Oxidation of Lipids III: On the Activity of Ascorbyl Palmitate during the Autoxidation of Two Types of Lipid Systems in the Presence of α‐Tocopherol

The kinetic behaviours of two types of lipid systems differing in unsaturation (sunflower oil and lard) and containing 0.05% α‐tocopherol are investigated in the presence of different concentrations of ascorbyl palmitate (AP) at different temperatures (25 and 100°C). The kinetic parameters (efficiency, strength and activity) of AP in the presence and absence of α‐tocopherol are quantitatively discussed. It is proved that ascorbyl palmitate is not only a synergist of α‐tocopherol but also a radical type inhibitor of the lipid autoxidation. It is found that the rise of temperature is associated with an increase in activity of AP in the presence of α‐tocopherol, this increase being more pronounced with the lipid system of lower oxidizability.