抗酸化剤としての芳香族ヒドロキシ酸誘導体に関する研究 (第2報) : O/W型エマルション中のヒドロキシ安息香酸類と溶存酸素量との関係

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The effect of aromatic hydroxycarboxylic acids as antioxidant and the influence of the metallic ion (Fe (II)) on the dissolved oxygen in O/W type emulsion was investigated by a polarographic Beckman Oxygen Analyzer, Model 777.<BR>Soybean oils with different POV (peroxide value) and water were emulsified into O/W type emulsion using Tween-40 as the emulsifier, and the variation of dissolved oxygen was measured in the presence of the Fe (II) ion.<BR>In order to evaluate the effect of aromatic hydroxycarboxylic acids, an acid solution was added to the emulsion, then, the metallic solution was added to the same emulsion, and the variation in the dissolved oxygen was measured.<BR>The results of these measurements revealed that the oxygen absorption increased in the presence of Fe (II) and, that the deteriorating effect was suppressed by the addition of these acids.<BR>When comparing the stabilizing effect of 2-hydroxybenzoic 2, 4-and 2, 6-dihydroxybenzoic acids with those of 2, 5-, 3, 4-, 3, 5-dihydroxybenzoic and gallic acids, the former are seen to function as the chelating agent, the latter are clearly seen to function as the radical inhibitor.
社団法人日本油化学会の論文