title: Detection and identification of extra virgin olive oil adulteration by GC-MS combined with chemometrics.
abstract: 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.
authors.affiliation: Research Center of Modernization of Traditional Chinese Medicine, College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China.
authors.forename: Yang
authors.initials: Y
authors.lastname: Yang
authors.forename: Miguel Duarte
authors.initials: MD
authors.lastname: Ferro
authors.forename: Isabel
authors.initials: I
authors.lastname: Cavaco
authors.forename: Yizeng
authors.initials: Y
authors.lastname: Liang
mesh_terms: D003314:Corn Oil / Q000737:chemistry; D005227:Fatty Acids / Q000032:analysis*; D005229:Fatty Acids, Monounsaturated; D005506:Food Contamination; D005513:Food Inspection / Q000379:methods; D005515:Food Labeling; D005638:Fruit / Q000737:chemistry*; D048088:Informatics / Q000379:methods; D031658:Olea / Q000737:chemistry*; D000069463:Olive Oil; D000074241:Peanut Oil; D010938:Plant Oils / Q000737:chemistry*; D000074262:Rapeseed Oil; D000074242:Sunflower Oil
chemical_list: D005227:Fatty Acids; D005229:Fatty Acids, Monounsaturated; D000069463:Olive Oil; D000074241:Peanut Oil; D010938:Plant Oils; D000074262:Rapeseed Oil; D000074242:Sunflower Oil; D003314:Corn Oil