Tarapoulouzi M. auteur aut IRD Skiada V. auteur aut IRD Agriopoulou S. auteur aut IRD Psomiadis D. auteur aut IRD Rebufa C. auteur aut IRD Roussos Sevastianos auteur aut IRD Theocharis C. R. auteur aut IRD Katsaris P. auteur aut IRD Varzakas T. auteur aut IRD text journalArticle eng text/pdf reformatted digital access Alpha stable isotope ratio mass spectrometer was used for stable isotope ratio (i.e., delta C-13, delta O-18, and delta H-2) measurements, achieving geographical discrimination using orthogonal projections to latent structures discriminant analysis. A total of 100 Greek monovarietal olive oil samples from three different olive cultivars (cv. Koroneiki, cv. Lianolia Kerkyras, and cv. Maurolia), derived from Central Greece and Peloponnese, were collected during the 2019-2020 harvest year aiming to investigate the effect of botanical and geographical origin on their discrimination through isotopic data. The selection of these samples was made from traditionally olive-growing areas in which no significant research has been done so far. Samples were discriminated mainly by olive cultivar and, partially, by geographical origin, which is congruent with other authors. Based on this model, correct recognition of 93.75% in the training samples and correct prediction of 100% in the test set were achieved. The overall correct classification of the model was 91%. The predictability based on the externally validated method of discrimination was good (Q(2) (cum) = 0.681) and illustrated that delta O-18 and delta H-2 were the most important isotope markers for the discrimination of olive oil samples. The authenticity of olive oil based on the examined olive varieties can be determined using this technique. specialized stable isotope ratios Greek olive oils chemometric analysis OPLS-DA discrimination fraud authenticity adulteration geographical origin quality GRECE 054 020 10 2 336 [13 p.] 2021 https://www.documentation.ird.fr/hor/fdi:010081055 10.3390/foods10020336 [F B010081055] https://www.documentation.ird.fr/hor/fdi:010081055 https://horizon.documentation.ird.fr/exl-doc/pleins_textes/divers21-03/010081055.pdf IRD - Base Horizon / Pleins textes 2021-04-01 2025-02-24 fdi:010081055 fre