期刊
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
卷 61, 期 15, 页码 3693-3702出版社
AMER CHEMICAL SOC
DOI: 10.1021/jf4000538
关键词
olive oil; adulteration; univariate analysis; multivariate analysis; PLS-LDA; Monte Carlo tree
资金
- National Nature Foundation Committee of the People's Republic of China [21075138]
- graduate degree thesis Innovation Foundation of Central South University [2011ssxt081]
- European Commission through the Erasmus Mundus Master in Quality in Analytical Laboratories [FPA 2008-0095]
In this study, an analytical method for the detection and identification of extra virgin olive oil adulteration with four types of oils (corn, peanut, rapeseed, and sunflower oils) was proposed. The variables under evaluation included 22 fatty acids and 6 other significant parameters (the ratio of linoleic/linolenic acid, oleic/linoleic acid, total saturated fatty acids (SFAs), polyunsaturated fatty acids (PUFAs), monounsaturated fatty acids (MUFAs), MUFAs/PUFAs). Univariate analyses followed by multivariate analyses were applied to the adulteration investigation. As a result, the univariate analyses demonstrated that higher contents of eicosanoic acid, docosanoic acid, tetracosanoic acid, and SFAs were the peculiarities of peanut adulteration and higher levels of linolenic acid, 11-eicosenoic acid, erucic acid, and nervonic acid the characteristics of rapeseed adulteration. Then, PLS-LDA made the detection of adulteration effective with a 1% detection limit and 90% prediction ability; a Monte Carlo tree identified the type of adulteration with 85% prediction ability.
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