title: Reliability of the ΔECN42 limit and global method for extra virgin olive oil purity assessment using different analytical approaches.
abstract: Two data elaboration approaches for evaluating olive oils authenticity were compared: (I) determination of the difference between the theoretical and actual amounts of triacylglycerols with partition number 42 (ΔECN42 ⩽ |0.2|); and (II) the global method, which considers also partition numbers 44 and 46 (returning a "correct"/"not correct" result). Analysis of 31 genuine extra virgin olive oil samples was performed using different analytical methods, namely liquid chromatography (LC) coupled with a refractive index detector (RID) and LC coupled with a mass spectrometry (MS), and the results compared. Several false positives were highlighted using the ΔECN42 limit with both instrumental approaches. The global method algorithm returned "correct" results for all the samples analysed (except two that gave no results) with LC-MS; on the other hand, 10 false positives were obtained elaborating data deriving from NARP-LC-RID analysis.
authors.affiliation: Dipartimento di Scienze del Farmaco e dei Prodotti per la Salute (SCIFAR), University of Messina, Viale Annunziata, 98168 Messina, Italy.
authors.forename: Marco
authors.initials: M
authors.lastname: Beccaria
authors.affiliation: Dipartimento di Scienze degli Alimenti, University of Udine, Via Sondrio 2/A, 33100 Udine, Italy.
authors.forename: Erica
authors.initials: E
authors.lastname: Moret
authors.affiliation: Dipartimento di Scienze degli Alimenti, University of Udine, Via Sondrio 2/A, 33100 Udine, Italy. Electronic address: giorgia.purcaro@uniud.it.
authors.forename: Giorgia
authors.initials: G
authors.lastname: Purcaro
authors.affiliation: Dipartimento di Scienze degli Alimenti, University of Udine, Via Sondrio 2/A, 33100 Udine, Italy.
authors.forename: Lorena
authors.initials: L
authors.lastname: Pizzale
authors.affiliation: Dipartimento di Scienze del Farmaco e dei Prodotti per la Salute (SCIFAR), University of Messina, Viale Annunziata, 98168 Messina, Italy.
authors.forename: Antonella
authors.initials: A
authors.lastname: Cotroneo
authors.affiliation: Dipartimento di Scienze del Farmaco e dei Prodotti per la Salute (SCIFAR), University of Messina, Viale Annunziata, 98168 Messina, Italy; Centro Integrato di Ricerca (C.I.R.), Università Campus Bio-medico, via Alvaro del Portillo 21, 00128 Roma, Italy.
authors.forename: Paola
authors.initials: P
authors.lastname: Dugo
authors.affiliation: Dipartimento di Scienze del Farmaco e dei Prodotti per la Salute (SCIFAR), University of Messina, Viale Annunziata, 98168 Messina, Italy; Centro Integrato di Ricerca (C.I.R.), Università Campus Bio-medico, via Alvaro del Portillo 21, 00128 Roma, Italy.
authors.forename: Luigi
authors.initials: L
authors.lastname: Mondello
authors.affiliation: Dipartimento di Scienze degli Alimenti, University of Udine, Via Sondrio 2/A, 33100 Udine, Italy.
authors.forename: Lanfranco S
authors.initials: LS
authors.lastname: Conte
mesh_terms: D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D013058:Mass Spectrometry / Q000379:methods*; D000069463:Olive Oil / Q000737:chemistry*; D010938:Plant Oils / Q000737:chemistry*
chemical_list: D000069463:Olive Oil; D010938:Plant Oils
keywords: Authenticity; Delta-ECN42; Global method; High performance liquid chromatography (HPLC); Mass spectrometry (MS); Olive oil; Refractive index detector (RID); Triacyglycerol (TAG)