Title: Multivariate analysis of NMR fingerprint of the unsaponifiable fraction of virgin olive oils for authentication purposes
Authors: ALONSO-SALCES RosaHEBERGER KarolyHOLLAND MargaretMORENO-ROJAS Jose ManuelMARIANI CBELLAN GRENIERO FabianoGUILLOU Claude
Citation: FOOD CHEMISTRY vol. 118 p. 956-965
Publisher: ELSEVIER SCI LTD
Publication Year: 2010
JRC N°: JRC55881
ISSN: 0308-8146
URI: http://publications.jrc.ec.europa.eu/repository/handle/JRC55881
DOI: 10.1016/j.foodchem.2008.09.061
Type: Articles in Journals
Abstract: A new approach to the geographical characterisation of virgin olive oils (VOOs) based on the 1H NMR fin- gerprint of the unsaponifiable matter is presented. The 1H NMR spectra of the unsaponifiable fraction of virgin olive oils from Spain, Italy, Greece, Tunisia, Turkey, and Syria were analysed by several pattern rec- ognition techniques (LDA, PLS-DA, SIMCA, and CART). PLS-DA (PLS-1 approach) obtained the best classi- fication results for all classes. Moreover, 1H NMR spectra of the bulk oil, and its corresponding unsaponifiable fraction, as well as the subfractions of the unsaponifiable fraction (alcohol, sterol, hydro- carbon, and tocopherol fractions) were studied in the search for the markers that multivariate techniques revealed to be related to the geographical origin of olive oils. Additionally, a preliminary study regarding 1H NMR data of the bulk oil and the corresponding unsaponifiable fraction of VOOs suggested that these spectral data contained complementary information for the geographical characterisation of VOOs.
JRC Institute:Institute for Health and Consumer Protection

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