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| 7种食用植物油物性及氧化稳定性评价 |
| Physicochemical properties and oxidative stability evaluation of seven kinds of edible vegetable oils |
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| DOI： |
| 中文关键词: 食用植物油 理化性质 微量成分 危害因子 氧化稳定性 |
| 英文关键词:edible vegetable oil physicochemical property minor component hazard factor oxidation stability |
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| 中文摘要: |
| 对国内7种食用植物油的脂肪酸组成、总酚、生育酚、植物甾醇、苯并(a)芘、黄曲霉毒素B1、3-氯丙醇酯含量、氧化稳定性指数(OSI)等指标进行测定分析。结果表明：这7种食用植物油不饱和脂肪酸含量均较高（78.29%～91.92%），但不同油的脂肪酸组成比例各不相同，不饱和脂肪酸、其中单不饱和脂肪酸、多不饱和脂肪酸含量最高的分别为菜籽油（91.92%）、油茶籽油（80.44%）和葵花籽油（61.18%）；微量活性成分中，菜籽油的总酚含量最高，为139.83 mg/kg；大豆油、菜籽油、玉米油中γ-生育酚含量较高，葵花籽油、米糠油中α-生育酚含量较高，大豆油生育酚含量最高，为1 129.21 mg/kg；不同油中植物甾醇均以β-谷甾醇为主，米糠油、玉米油中植物甾醇含量较高，分别为10 705.8 mg/kg和8 596.7 mg/kg；危害因子中，只有少数食用植物油检出苯并(a)芘和黄曲霉毒素B1，且含量均符合国家相关标准规定；菜籽油、葵花籽油、大豆油、花生油中3-氯丙醇酯总量较低，均小于1.0 mg/kg；菜籽油、大豆油的氧化稳定性指数（OSI）较高，葵花籽油、油茶籽油的较低，且与总酚含量呈极显著正相关。 |
| 英文摘要: |
| The fatty acid composition, contents of polyphenols, tocopherols, phytosterols, benzo(a) pyrene, aflatoxin B1, 3-MCPD ester, and oxidative stability (OSI) of seven kinds of edible vegetable oils were determined and analyzed. The results showed that the contents of unsaturated fatty acids of seven kinds of edible vegetable oils were all relatively high (78.29%-91.92%), but the fatty acid compositions were different among different oils. The oil-tea camellia seed oil, sunflower seed oil and rapeseed oil had the highest contents of monounsaturated fatty acid (80.44%), polyunsaturated fatty acid (61.18%) and unsaturated fatty acid (91.92%) respectively. The content of total polyphenols was the highest in rapeseed oil, reaching 139.83 mg/kg. The content of γ-tocopherol was relatively high in soybean oil, rapeseed oil and corn oil, and α-tocopherol was relatively high in sunflower seed oil and rice bran oil. Total tocopherols content was the highest in soybean oil (1 129.21 mg/kg). The main phytosterols composition was β-sitosterol and the contents of phytosterols were relatively high in rice bran oil (10 705.8 mg/kg) and corn oil (8 596.7 mg/kg). Benzo(a)pyrene and aflatoxin B1 were detected from few edible vegetable oils and the contents were all lower than the national standards. The total contents of 3-MCPD esters were low in rapeseed oil, sunflower seed oil, soybean oil and peanut oil (lower than 1.0 mg/kg). The oxidative stability index(OSI) results were higher for rapeseed oil and soybean oil and lower for sunflower seed oil and oil-tea camellia seed oil, which was extremely, significantly and positively related to the total polyphenols content. |
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