Effect of L-Ascorbic Acid and L-Ascorbyl Palmitate on the Peroxidation of Linoleic Acid : Relationship between Appearance of Reaction Mixture and Peroxidation of Linoleic Acid

摘要

The relationship between the appearance of reaction mixtures being shaken of linoleic acid (LA) and various buffers containing alcohol and the peroxidation of LA were examined at 37℃ with L-ascorbic acid (AsA) or L-ascorbyl palmitate (AP) as catalysts. With AsA, the transparency of the reaction mixture increased with the suppression of the peroxidation. Of the alcohols tested, 1-propanol was the best for transparency of the reaction mixture and for suppression of LA peroxidation; EtOH was less potent, and MeOH, the least. The reaction mixture was turbid at low concentrations of alcohol. With AP, the appearance of the reaction mixture was similar to that with AsA, but AP suppressed the peroxidation of LA much more distinctly. This may suggest that AP reaches the surface of the LA effectively, even when the reaction mixture is turbid, and then retards LA peroxidation.