INVESTIGADORES
ALONSO SALCES Rosa Maria
artículos
Título:
1H-NMR and isotopic fingerprinting of olive oil and its unsaponifiable fraction. Tracing the geographical origin of virgin olive oils by pattern recognition
Autor/es:
ALONSO SALCES, ROSA MARIA; SEGEBARTH, N.; GARMÓN-LOBATO, S.; HOLLAND, M. V.; MORENO-ROJAS, J. M.; FERNANDEZ-PIERNA, J. A.; BAETEN, V.; FUSELLI, S. R.; GALLO, B.; BERRUETA, L. A.; RENIERO, F.; GUILLOU, C.; HÉBERGER, K.
Revista:
EUROPEAN JOURNAL OF LIPID SCIENCE AND TECHNOLOGY
Editorial:
WILEY-V C H VERLAG GMBH
Referencias:
Lugar: Weinheim; Año: 2015 vol. 117 p. 1991 - 2006
ISSN:
1438-7697
Resumen:
1HNMR spectral data and H and C isotope abundances of virgin olive oils (VOOs) and their unsaponifiable fractions were analysed by pattern recognition techniques, such as principal component analysis (PCA) and partialleast squares discriminant analysis (PLSDA). The aim was to develop chemical tools for the authentication of VOOs according to their geographical origin or Protected Designation of Origin (PDO), as well as to detect the mislabelling of the provenance of VOOs, at the regional or national level, or the mislabelling of nonPDO oils as PDO VOOs. The relationship between stable isotope abundances of the VOOs and their unsaponifiable fractions and the latitude of the VOO geographical origin was confirmed; but these criteria were not completely discriminant to differentiate VOOs according to their geographical origin. However, delta2H and/or delta13C data provided complementary geographical information to 1HNMR data in the PLSDA binary classification models afforded for VOOs from Greece, Spain, Italy, Izmir (Turkey), Crete (Greece), and the PDOs Riviera Ligure (Italy) and Huile d´olive d´AixenProvence (France). 2H/1H and 13C/12C ratios of the unsaponifiable fractions of VOOs are reported here for the first time. The present approach for PDO Riviera Ligure VOOs, based on 1HNMR data and C isotope abundance of the bulk oil and its unsaponifiable fraction, outperformed the previously reported classification models. Moreover, the PLSDA models to authenticate VOOs from Greece and detect nonGreek VOOs achieved over 93 % of correct predictions.