Advisor(s)
Abstract(s)
Stable isotope contents of carbon, hydrogen and oxygen are known to reflect the geo-climatic conditions under
which olives grown. This study aims to unravel the correlation between some of the main geographic variables
and the isotopic composition of different Portuguese varietal extra virgin olive oil (EVOO) samples. Thus, the
isotopic composition (δ13C, δ18O and δ2H) of 38 EVOO samples from 11 olive varieties from 2 Portuguese
regions (Alentejo and Trás-os-Montes) was studied using an elemental analyzer coupled to an isotope ratio mass
spectrometry. Multivariate analysis indicated that bulk δ13C, δ2H and δ18O values were enough to significantly
(P < 0.05) predict altitude, latitude, longitude, temperature, rainfall, and sea distance. This work showed that
the assessment of EVOO isotopic composition give information not only on the geographic origin, but also on the
environmental conditions. To the best of our knowledge, this is the first report on bulk isotopic composition of
Portuguese EVOOs.
Description
Keywords
Extra virgin olive oil Geographic origin Multi linear regression Stable isotopes Statistical analysis
Citation
Jiménez-Morillo, Nicasio T.; Palma, Vera; Garcia, Raquel; Pereira, José Alberto; Dias, Cristina Barrocas; Cabrita, Maria João (2020). Multivariate geostatistical analysis of stable isotopes in Portuguese varietal extra virgin olive oils. Microchemical Journal. ISSN 0026-265X. 157, p. 1-7