Chemometric classification and quantification of sesame oil adulterated with other vegetable oils based on fatty acids composition by gas chromatography
Chemometric classification and quantification of sesame oil adulterated with other vegetable oils based on fatty acids composition by gas chromatography
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基于脂肪酸组成的气相色谱化学计量学分类和定量掺入其他植物油的芝麻油
DOI：
10.1016/j.lwt.2019.03.085
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发表时间：
2019-07-01
影响因子：
6
通讯作者：
Yan, Wenjing
中科院分区：
文献类型：
--
作者：
Xing, Changrui;Yuan, Xiangyu;Yan, Wenjing
通过测定脂肪酸组成，研究了四种植物油在芝麻油中掺假的检测方法。对73个芝麻样品、57个菜籽样品、103个大豆种子样品、11个品牌的葵花籽油和14个品牌的玉米油的掺假脂肪酸组成进行了分析。用判别分析和主成分分析方法研究了芝麻油及其混合物的脂肪酸组成及其比值的数据分布模式。在主成分分析得分图中，纯植物油呈聚集趋势。虽然由脂肪酸组成计算的参数对单一植物油或不同植物油的混合油脂的检测简单有效，但该方法只能用于定性检测。应用线性判别分析，总准确率在97.27%~100%之间。应用偏最小二乘回归多元数量化方法，成功地对芝麻油中添加植物油的种类和含量进行了定量识别。总体而言，用气相色谱测定植物油的脂肪酸组成对芝麻油混合物的定性和定量检测都是有用的。
The detection of adulteration of sesame oil with four vegetable oils was investigated by measuring fatty acid composition. Adulteration based fatty acid composition was evaluated with 73 sesame seed samples, 57 rapeseed seed samples, 103 soybean seed samples, 11 brands of sunflower oil and 14 brands of maize oil. Discriminate analysis and principal component analysis were used to study the data distribution patterns based on the fatty acid composition and their ratios obtained from pure sesame oils and blends. Pure vegetable oils were gathered in a tendency in principal component analysis score diagram. Although the parameters calculated by fatty acid composition were simple and effective in detection of oil mixture of single vegetable edible oil or different vegetable edible oil, this method could only be used for qualitative determination. Linear discriminant analysis applied and the obtained overall accuracies were between 97.27% and 100%. Partial least-squares regression, the multivariate quantification method, have been successfully applied and quantitatively recognized the type and the level of extra added vegetable oils into the sesame oils. In general, the fatty acid profile of vegetable oils obtained by GC was useful in both qualitative and quantitative detection of sesame oil blends.