Affordable Access

Chemometric discrimination of the geographical origin of three greek cultivars of olive oils by stable isotope ratio analysis

Authors
  • Tarapoulouzi, M.
  • Skiada, V.
  • Agriopoulou, S.
  • Psomiadis, D.
  • Rebufa, C.
  • Roussos, Sevastianos
  • Theocharis, C. R.
  • Katsaris, P.
  • Varzakas, T.
Publication Date
Jan 01, 2021
Source
Horizon Pleins textes
Keywords
Language
English
License
Unknown
External links

Abstract

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.

Report this publication

Statistics

Seen <100 times