title: Detection of Chemlali extra-virgin olive oil adulteration mixed with soybean oil, corn oil, and sunflower oil by using GC and HPLC.
abstract: Fatty acid composition as an indicator of purity suggests that linolenic acid content could be used as a parameter for the detection of extra/virgin olive oil fraud with 5% of soybean oil. The adulteration could also be detected by the increase of the trans-fatty acid contents with 3% of soybean oil, 2% of corn oil, and 4% of sunflower oil. The use of the ΔECN42 proved to be effective in Chemlali extra-virgin olive oil adulteration even at low levels: 1% of sunflower oil, 3% of soybean oil, and 3% of corn oil. The sterol profile is almost decisive in clarifying the adulteration of olive oils with other cheaper ones: 1% of sunflower oil could be detected by the increase of Δ7-stigmastenol and 4% of corn oil by the increase of campesterol. Linear discriminant analysis could represent a powerful tool for faster and cheaper evaluation of extra-virgin olive oil adulteration.
authors.affiliation: Laboratoire d'Électrochimie et Environnement, École Nationale d'Ingénieurs de Sfax, Université de Sfax , B.P. 1173, 3038 Sfax, Tunisia.
authors.forename: Hazem
authors.initials: H
authors.lastname: Jabeur
authors.forename: Akram
authors.initials: A
authors.lastname: Zribi
authors.forename: Jamel
authors.initials: J
authors.lastname: Makni
authors.forename: Ahmed
authors.initials: A
authors.lastname: Rebai
authors.forename: Ridha
authors.initials: R
authors.lastname: Abdelhedi
authors.forename: Mohamed
authors.initials: M
authors.lastname: Bouaziz
mesh_terms: D002849:Chromatography, Gas / Q000379:methods*; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D003314:Corn Oil / Q000032:analysis*; D016002:Discriminant Analysis; D005506:Food Contamination / Q000032:analysis*; D000069463:Olive Oil; D010938:Plant Oils / Q000032:analysis*; D013024:Soybean Oil / Q000032:analysis*; D000074242:Sunflower Oil
chemical_list: D000069463:Olive Oil; D010938:Plant Oils; D000074242:Sunflower Oil; D013024:Soybean Oil; D003314:Corn Oil