Fast screening of turkish olive oil by NMR spectroscopy for geographical determination and discrimination purposes

Abstract

The main goal of this study is to rapidly screen olive oil contents by acquiring one dimensional (1D) H-1 NMR spectra of 38 samples from Turkey, The Middle East, and Libya. The quantitative analysis of the H-1 NMR helped in distinguishing the geographical origin of the olive oil samples. The intensity of H-1 NMR variables was submitted to the statistical method, analysis of variance (ANOVA). As a result of combining the NMR data and ANOVA, olive oils were discriminated based on regional origin rather than province. This less time consuming discriminative screening by H-1 NMR does not require any further analysis of the olive oil, including oxidative stability measurements or gas chromatography. The possibility of determining authenticity, even in an olive growing area of a small village was also shown. The two-dimensional (2D) non-invasive H-1 DOSY NMR experiment, known as ``NMR chromatography'', was used to determine the olive oil sub-fraction.