Multivariate analysis of NMR fingerprint of the unsaponifiable fraction of virgin olive oils for authentication purposes |
| |
| Authors: | R.M. Alonso-Salces,K. Hé berger,M.V. Holland,J.M. Moreno-Rojas,C. Mariani,G. Bellan,F. Reniero,C. Guillou |
| |
| Affiliation: | 1. European Commission - Joint Research Centre, Institute for Health and Consumer Protection, Physical and Chemical Exposure Unit, Via Fermi 2, I-21020 Ispra, Italy;2. Chemical Research Centre, Hungarian Academy of Sciences, H-1525 Budapest, P.O. Box 17, Hungary;3. Laboratorio oli e grassi vegetali e animali, Stazione Sperimentale per le Industrie degli Oli e dei Grassi (SSOG), Via Giuseppe Colombo 79, I-20133 Milan, Italy |
| |
| Abstract: | A new approach to the geographical characterisation of virgin olive oils (VOOs) based on the 1H NMR fingerprint 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 recognition techniques (LDA, PLS-DA, SIMCA, and CART). PLS-DA (PLS-1 approach) obtained the best classification 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, hydrocarbon, 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. |
| |
| Keywords: | Olive oil Unsaponifiable NMR fingerprinting Pattern recognition Multivariate data analysis |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
