Abstract
In preliminary experiments, we demonstrated that a cyclic voltammogram of a lipophilic compound can be conveniently obtained with the past electrode that was made from graphite powder and an oil in which the compound is dissolved. This finding was applied to the direct determination of lipid peroxides. Oxygenation of lipids at 120°C was followed by the cathodic current created by the reduction of the peroxides. The validity of the method was investigated by comparison with conventional methods (peroxide value, thiobarbituric acid, and weight gain). The amount of peroxides in an oil and its cathodic current show a linear relation in the initial stages of peroxidation (ca. 12 h). This electrochemical method was applied successfully to the evaluation of the antioxidant activity of butylated hydroxytoluene in linseed oil.
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Kim, OS., Maekawa, K. & Kusuda, K. Cyclic voltammetry of lipophilic compounds in oil: Direct determination of lipid peroxide with a carbon past electrode. J Am Oil Chem Soc 72, 299–303 (1995). https://doi.org/10.1007/BF02541086
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DOI: https://doi.org/10.1007/BF02541086