11种品牌玉米油脂肪酸及异构体的主成分分析

发布时间：2018-12-14 22:05

【摘要】：对市售的11种品牌玉米油开展了脂肪酸(包括脂肪酸及其异构体)组成与含量的调查研究。采用气相色谱技术,结合主成分分析法,分析了不同品牌玉米油中脂肪酸的差异性和相关性。结果表明,11种品牌玉米油中共鉴定出19种脂肪酸,包括7种饱和脂肪酸,5种不饱和脂肪酸,6种反式脂肪酸(TFAs)和1种共轭亚油酸(t,t-CLAs),平均含量分别为14.18×10~(-2) g/g,80.32×10~(-2) g/g,1.47×10~(-2) g/g和0.23×10~(-2) g/g;其中,亚油酸(C18:2-9c12c)、油酸(C18:1-9c)和棕榈酸(C16:0)依次是玉米油中含量最多的3种脂肪酸;不同品牌玉米油中脂肪酸含量存在显著性差异(p0.05)。主成分分析揭示了不同品牌玉米油在脂肪酸含量上的相似性、差异性及脂肪酸之间相关程度,TFAs和CLAs正相关程度高。本研究为评价市售玉米油脂肪酸品质特征提供了较为全面的数据支撑。
[Abstract]:The composition and content of fatty acids (including fatty acids and their isomers) in 11 brands of corn oil were investigated. The difference and correlation of fatty acids in different brands of corn oil were analyzed by gas chromatography and principal component analysis. The results showed that 19 fatty acids including 7 saturated fatty acids, 5 unsaturated fatty acids, 6 trans fatty acids (TFAs) and 1 conjugated linoleic acid (tncas) were identified in 11 brands of corn oil. The average contents were 14.18 脳 10 ~ (-2) g / g and 0.23 脳 10 ~ (-2) g / g, respectively, and the average contents were 80.32 脳 10 ~ (-2) g / g and 0.23 脳 10 ~ (-2) g / g, respectively. Among them, linoleic acid (C18:2-9c12c), oleic acid (C18: 1-9c) and palmitic acid (C16: 0) were the three fatty acids in corn oil, and there were significant differences among different brands of corn oil. Principal component analysis revealed the similarity of fatty acid content, difference and correlation between fatty acids in different brands of corn oil. The positive correlation between TFAs and CLAs was high. This study provides a comprehensive data support for evaluating the fatty acid quality of corn oil on the market.
【作者单位】：中国农业科学院农产品加工研究所/农业部农产品加工综合性重点实验室;
【基金】：国家自然科学基金项目(31271851) 北京市自然科学基金项目(6154033) 中国博士后基金项目(2014M561105,2015T80158)
【分类号】：TS227

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