Vitamin E is the most potent lipid‐soluble antioxidant in human plasma. The richest sources of vitamin E are plant oils. This study aims to determine the concentrations of alpha, beta + gamma and delta‐tocopherols (α‐T, β + γ‐T and δ‐T) in various plant or seed oils commonly used in food, pharmaceutics or cosmetics. Forty‐one different plant or seed oil samples were purchased and kept at +4°C in the dark until the chromatographic analysis. Analyses were performed using high‐performance liquid chromatography (HPLC) following the dilution of the oil samples with 2‐propanol in a 1:3 ratio, without further processing. Total tocopherol levels in the oils analysed ranged from 11 to 3468 mg/kg. When the highest total tocopherol levels were taken into consideration, the first five plant oils were pomegranate seeds, wheat germ, fig seed, hippophae rhamnoides and corn oils. Moreover, the wheat germ, fig seed, safflower, sunflower and hazelnut oils had highest α‐tocopherol concentration in the oils analysed. These plant or seed oils have a high potential for using in the food, pharmaceutical and cosmetic industries due to their high tocopherol contents.

中文翻译：

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植物油中的维生素E（α-，β+γ-和δ-生育酚）水平

维生素E是人体血浆中最有效的脂溶性抗氧化剂。维生素E的最丰富来源是植物油。这项研究旨在确定食品，药品或化妆品中常用的各种植物油或种子油中的α，β+γ和δ-生育酚（α‐T，β+ γ‐T和δ‐T）的浓度。购买了41种不同的植物油或种子油样品，并在黑暗中保持在+ 4°C下，直到进行色谱分析为止。用2-丙醇按1：3的比例稀释油样后，使用高效液相色谱（HPLC）进行分析，无需进一步处理。分析油中的总生育酚水平为11至3468 mg / kg。当考虑到最高的总生育酚水平时，前五种植物油是石榴籽，小麦胚芽，无花果籽，河马鼠李和玉米油。此外，在分析的油中，小麦胚芽，无花果种子，红花，向日葵和榛子油中的α-生育酚浓度最高。这些植物油或种子油的生育酚含量高，因此在食品，制药和化妆品工业中具有很高的潜力。