基于脂肪酸和生育酚组成的油茶籽油掺假判别可行性分析

从脂肪酸和生育酚的组成分析以及所得色谱数据的系统聚类分析(HCA)和主成分分析(PCA)方面考察了10种植物油的异同点。气相色谱分析10种植物油的脂肪酸组成,鉴别得到12种脂肪酸。对脂肪酸组成数据的HCA分析结果表明,油茶籽油与橄榄油和菜籽油具有相似的脂肪酸组成,而与其他植物油的脂肪酸组成差异显著;而PCA分析结果可以进一步区分油茶籽油与橄榄油和菜籽油。高效液相色谱分析10种植物油的生育酚组成,测得4种异构体的相对含量。对生育酚组成数据的HCA、PCA分析结果表明,油茶籽油和菜籽油的生育酚组成差异显著。因此,基于脂肪酸和生育酚组成分析可以作为油茶籽油掺假判别的依据。

Feasibility of adulteration of oil-tea camellia seed oil based on fatty acid and tocopherol compositions

The similarities and differences of ten vegetable oils were investigated in terms of their fatty acid and tocopherol compositions and subsequent data processed by hierarchical clustering analysis(HCA) and principal component analysis(PCA). Fatty acid compositions of ten vegetable oils were analyzed by gas chromatography (GC) and twelve fatty acid were identified. HCA of fatty acids profiles revealed great similarities among oil-tea camellia seed oil, olive oil and rapeseed oil, but they were significantly different from other vegetable oils. However, PCA of fatty acids showed discrimination among oil-tea camellia seed oil, olive oil and rapeseed oil. HPLC analysis of tocopherols demonstrated four isomers and their relative contents were determined. HCA and PCA of tocopherol composition revealed great differences between oil-tea camellia seed oil and rapeseed oil. As a conclusion, oil-tea camellia seed oil could be discriminated from other vegetable oils based on fatty acid and tocopherol compositions.