Effect of Cathodic Solution Produced by the Electrolysis of a Dilute NaCl Solution on the Oxidation of Linoleic Acid, Linoleoyl Acylglycerols, Soybean Phosphatidylcholine and α-Tocopherol

Abstract

The cathodic solution inhibited the oxidations of linoleoyl acylglycerols, trilinolein, 1,3-dilinolein and 1-monolinolein, in an aqueous phase, but the antioxidant effects of the cathodic solution were different for each of these acylglycerols and the oxidation of trilinolein was most effectively inhibited, followed by 1,3-dilinolein and 1-monolinolein. This result suggests that the antioxidant effect of the cathodic solution decreased with the increasing OH base number in the acylglycerol molecule. On the other hand, the cathodic solution had little antioxidant effect on soybean phosphatidylcholine in both micelles and liposomes. Moreover, the cathodic solution promoted the oxidation of linoleic acid and α-tocopherol. The different effect of the cathodic solution on the oxidation of each lipid species was discussed by correlating it with the ionization of these lipids in the cathodic solution.