title: Comparison of static headspace, headspace solid phase microextraction, headspace sorptive extraction, and direct thermal desorption techniques on chemical composition of French olive oils.
abstract: Static headspace (SHS), headspace solid phase microextraction (HS-SPME), headspace sorptive extraction (HSSE), and direct thermal desorption (DTD) were applied to the analysis of four French virgin olive oils from Corsica. More than 60 compounds were isolated and characterized by GC-RI and GC-MS. SHS was not suited to the characterization of olive oil volatile compounds because of low sensitivity. The SPME and HSSE techniques were successfully applied to olive oil headspace analysis. Both methods allow the characterization of volatile compounds (mainly C(6) aldehydes and alcohols), which contribute significantly to the "green" flavor note of virgin olive oils. The PDMS stir bar showed a higher concentration capacity than a DVB/CAR/PDMS SPME fiber due to the higher volume of polymeric coating. DTD was a very good tool for extracting volatile and especially semivolatile compounds, such as sesquiterpenes, but requires a significant investment like that for HSSE. Finally, SPME may be a more appropriate technique for routine quality control due to its operational simplicity, repeatability, and low cost.
authors.affiliation: Laboratoire "Arômes, Synthèses and Interactions", Faculté des Sciences de Nice Sophia-Antipolis, Parc Valrose, 06108 Nice Cedex 2, France.
authors.forename: Jean-François
authors.initials: JF
authors.lastname: Cavalli
authors.forename: Xavier
authors.initials: X
authors.lastname: Fernandez
authors.forename: Louisette
authors.initials: L
authors.lastname: Lizzani-Cuvelier
authors.forename: André-Michel
authors.initials: AM
authors.lastname: Loiseau
mesh_terms: D002849:Chromatography, Gas / Q000379:methods*; D005602:France; D008401:Gas Chromatography-Mass Spectrometry / Q000379:methods*; D006358:Hot Temperature; D013058:Mass Spectrometry / Q000379:methods; D000069463:Olive Oil; D010938:Plant Oils / Q000737:chemistry*; D012680:Sensitivity and Specificity
chemical_list: D000069463:Olive Oil; D010938:Plant Oils