Detection and Identification of extra virgin olive oil adulteration by GC-MS combined with chemometrics

Yang, Yang; Ferro, Miguel Duarte; Cavaco, Isabel Maria Palma Antunes; Liang, Yizeng

http://hdl.handle.net/10400.1/3265

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Authors

Yang, Yang

Ferro, Miguel Duarte

Cavaco, Isabel Maria Palma Antunes

Liang, Yizeng

Abstract(s)

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, PLSLDA 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.

Keywords

Olive oil Adulteration Univariate analysis Multivariate analysis PLS-LDA Monte Carlo tree

URI

http://hdl.handle.net/10400.1/3265

Citation

Yang, Yang; Ferro, Miguel Duarte; Cavaco, Isabel; Liang, Yizeng. Detection and Identification of Extra Virgin Olive Oil Adulteration by GC-MS Combined with Chemometrics, Journal of Agricultural and Food Chemistry, 61, 15, 3693-3702, 2013.