Presence of iron, oil oxidizes, and deteriorates. In this paper, the effects of Fe(III) and Fe(II) with different storage conditions on oxidation stability of soybean oil were studied. To further clarify the reactions, emphatically, the chemical structure of the oil and sediment was characterized. The results showed that the peroxide value (PV) of soybean oil decreased with the increase of Fe(III) dosage, whereas Fe(II) did not. A rise in temperature would cause PV increase of all samples. Comparing with the blank group, Fe(II) and Fe(III) could promote and inhibit the oxidation of soybean oil, respectively, and PV of the vacuum‐treated samples remained unchanged. When both Fe(III) and Fe(II) existed, the higher the proportion of Fe(III), the lower PV. There was no significant change in soybean oil and Fe(II) after the reaction. However, Fe(III) was wrapped in soybean oil due to chemisorption, which cannot be washed by conventional methods.

中文翻译：

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Fe（III）和Fe（II）对不同条件下大豆油过氧化值的影响及产物表征

铁，油的存在会氧化并变质。本文研究了不同储存条件下的Fe（III）和Fe（II）对大豆油氧化稳定性的影响。为了进一步阐明反应，着重描述了油和沉积物的化学结构。结果表明，大豆油的过氧化物值（PV）随Fe（III）剂量的增加而降低，而Fe（II）没有。温度升高会导致所有样品的PV升高。与空白组相比，Fe（II）和Fe（III）分别可以促进和抑制大豆油的氧化，真空处理样品的PV保持不变。当Fe（III）和Fe（II）同时存在时，Fe（III）的比例越高，PV越低。反应后大豆油和Fe（II）没有明显变化。然而，