title: Detection of irradiated beef by nuclear magnetic resonance lipid profiling combined with chemometric techniques.
abstract: The combination of (1)H NMR lipid profiling with multivariate analysis was applied to differentiate irradiated and non-irradiated beef. Two pattern recognition chemometric procedures, stepwise linear discriminant analysis (sLDA) and artificial neural networks (ANNs), provided a successful discrimination between the groups investigated. sLDA allowed the classification of 100% of the samples into irradiated or non-irradiated beef groups; the same result was obtained by ANNs using the 1 kGy irradiation dose as discriminant value suggested by the network. Furthermore, sLDA allowed the classification of 81.9% of the beef samples according to the irradiation dose (0, 2.5, 4.5 and 8 kGy). (1)H NMR lipid profiling, coupled with multivariate analysis may be considered a suitable and promising screening tool for the rapid detection of irradiated meat in official control of food.
authors.affiliation: Dipartimento di Produzioni Animali, Biotecnologie Veterinarie, Qualità e Sicurezza degli Alimenti, Università degli Studi di Parma, Via del Taglio 10, 43126 Parma, Italy. emanuela.zanardi@unipr.it
authors.forename: Emanuela
authors.initials: E
authors.lastname: Zanardi
authors.forename: Augusta
authors.initials: A
authors.lastname: Caligiani
authors.forename: Enrico
authors.initials: E
authors.lastname: Padovani
authors.forename: Mario
authors.initials: M
authors.lastname: Mariani
authors.forename: Sergio
authors.initials: S
authors.lastname: Ghidini
authors.forename: Gerardo
authors.initials: G
authors.lastname: Palla
authors.forename: Adriana
authors.initials: A
authors.lastname: Ianieri
mesh_terms: D000818:Animals; D002417:Cattle; D003503:Cyclobutanes / Q000032:analysis; D016002:Discriminant Analysis; D005514:Food Irradiation; D008055:Lipids / Q000032:analysis*; D009682:Magnetic Resonance Spectroscopy; D008460:Meat / Q000032:analysis* / Q000528:radiation effects*; D015999:Multivariate Analysis; D016571:Neural Networks, Computer
chemical_list: D003503:Cyclobutanes; D008055:Lipids; C063381:2-dodecylcyclobutanone