title: Direct thermal extraction and gas chromatographic-mass spectrometric determination of volatile compounds of extra-virgin olive oils.
abstract: The instrumental performances of a Thermo Desorption-Cooled Injection System coupled with a gas chromatography-mass spectrometer (GC-MS) were improved by a Plackett-Burman experimental design for the direct thermal extraction of volatile compounds from extra-virgin olive oils. The obtained experimental conditions were applied to the analysis of samples from West Liguria (cv. Taggiasca > or = 90%) and Spain (cv. Arbequina), which shared such similar sensorial features that Taste Panel did not distinguish them. Principal component analysis (PCA) was then applied to the experimental data. Three linear combinations of the amounts of the lipoxygenase oxidation products proved to be decisive and sufficient in the differentiation of the two groups of samples.
authors.affiliation: Dipartimento di Chimica e Tecnologie Farmaceutiche e Alimentari, Università di Genova, Via Brigata Salerno (ponte), I-16147 Genova, Italy. zunin@dictfa.unige.it
authors.forename: Paola
authors.initials: P
authors.lastname: Zunin
authors.forename: Raffaella
authors.initials: R
authors.lastname: Boggia
authors.forename: Silvia
authors.initials: S
authors.lastname: Lanteri
authors.forename: Riccardo
authors.initials: R
authors.lastname: Leardi
authors.forename: Roberto
authors.initials: R
authors.lastname: De Andreis
authors.forename: Filippo
authors.initials: F
authors.lastname: Evangelisti
mesh_terms: D008401:Gas Chromatography-Mass Spectrometry / Q000379:methods*; D000069463:Olive Oil; D010938:Plant Oils / Q000737:chemistry*; D014835:Volatilization
chemical_list: D000069463:Olive Oil; D010938:Plant Oils