title: Electronic nose and isotope ratio mass spectrometry in combination with chemometrics for the characterization of the geographical origin of Italian sweet cherries.
abstract: Sweet cherries from two Italian regions, Apulia and Emilia Romagna, were analysed using electronic nose (EN) and isotope ratio mass spectrometry (IRMS), with the aim of distinguishing them according to their geographic origin. The data were elaborated by statistical techniques, examining the EN and IRMS datasets both separately and in combination. Preliminary exploratory overviews were performed and then linear discriminant analyses (LDA) were used for classification. Regarding EN, different approaches for variable selection were tested, and the most suitable strategies were highlighted. The LDA classification results were expressed in terms of recognition and prediction abilities and it was found that both EN and IRMS performed well, with IRMS showing better cross-validated prediction ability (91.0%); the EN-IRMS combination gave slightly better results (92.3%). In order to validate the final results, the models were tested using an external set of samples with excellent results.
authors.affiliation: Dipartimento di Chimica, Università di Bari "Aldo Moro", Via Orabona 4, 70126 Bari, Italy. Electronic address: francesco.longobardi@uniba.it.
authors.forename: F
authors.initials: F
authors.lastname: Longobardi
authors.affiliation: Dipartimento di Chimica, Università di Bari "Aldo Moro", Via Orabona 4, 70126 Bari, Italy.
authors.forename: G
authors.initials: G
authors.lastname: Casiello
authors.affiliation: Dipartimento di Chimica, Università di Bari "Aldo Moro", Via Orabona 4, 70126 Bari, Italy.
authors.forename: A
authors.initials: A
authors.lastname: Ventrella
authors.affiliation: Dipartimento di Chimica, Università di Bari "Aldo Moro", Via Orabona 4, 70126 Bari, Italy.
authors.forename: V
authors.initials: V
authors.lastname: Mazzilli
authors.affiliation: Dipartimento di Chimica, Università di Bari "Aldo Moro", Via Orabona 4, 70126 Bari, Italy.
authors.forename: A
authors.initials: A
authors.lastname: Nardelli
authors.affiliation: Dipartimento di Chimica, Università di Bari "Aldo Moro", Via Orabona 4, 70126 Bari, Italy.
authors.forename: D
authors.initials: D
authors.lastname: Sacco
authors.affiliation: Dipartimento di Chimica, Università di Bari "Aldo Moro", Via Orabona 4, 70126 Bari, Italy; Consiglio Nazionale delle Ricerche, Istituto per i Processi Chimico-Fisici (IPCF-CNR), sez. di Bari, Via Orabona 4, 70126 Bari, Italy.
authors.forename: L
authors.initials: L
authors.lastname: Catucci
authors.affiliation: Dipartimento di Chimica, Università di Bari "Aldo Moro", Via Orabona 4, 70126 Bari, Italy; Consiglio Nazionale delle Ricerche, Istituto per i Processi Chimico-Fisici (IPCF-CNR), sez. di Bari, Via Orabona 4, 70126 Bari, Italy.
authors.forename: A
authors.initials: A
authors.lastname: Agostiano
mesh_terms: D062609:Electronic Nose; D005843:Geography; D007554:Isotopes / Q000032:analysis*; D007558:Italy; D013058:Mass Spectrometry / Q000379:methods*; D000068220:Prunus avium / Q000737:chemistry*; D013057:Spectrum Analysis / Q000379:methods*
chemical_list: D007554:Isotopes
keywords: Chemometrics; Electronic nose; Geographic origin; Isotope ratio mass spectrometry; Sweet cherry