Assessment of the triacylglycerol fraction of olive oil by 1D-NMR spectroscopy: exploring the usefulness of DEPT tool on the peak assignments of 13 C NMR spectra
Résumé
Nuclear magnetic resonance (NMR) spectroscopy has been extensively used to date for the analysis of olive oil samples and constitutes a valuable tool particularly for the study of the triacylglycerol fraction, which is the major fraction of olive oils. In this report, we demonstrate the usefulness of one-dimensional NMR spectroscopy (1 H and 13 C NMR) for the non-destructive analysis of the triacylglycerol fraction of olive oils. To achieve this goal, 13 C spectral editing technique known as distortionless enhancement by polarization transfer (DEPT), namely 13 C NMR DEPT 45, 13 C NMR DEPT 90, 13 C NMR DEPT 135 was used for the analysis of the triacylglycerol fraction of the olive oil sample owing to the simplification on peak assignments of 13 C spectra. The suitability and usefulness of those DEPT experiments using different angle values in only one pulse sequence will be explored on the interpretation of 13 C NMR spectra. In overall, DEPT tool improves the sensitivity of the analysis due to the enhancement in the signal-to-noise ratio, which is important for this type of analysis contributing to the characterization of olive oils.
Domaines
Chimie analytique
Origine : Fichiers produits par l'(les) auteur(s)
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