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Chemometric Discrimination of the Varietal Origin of Extra Virgin Olive Oils: Usefulness of 13C Distortionless Enhancement by Polarization Transfer Pulse Sequence and 1H Nuclear Magnetic Resonance Data and Effectiveness of Fusion with Mid-Infrared Spectroscopy Data

Abstract : The label authentication of monovarietal extra virgin olives is of great relevance from a socio-economical point of view. This work aims to gain insights into the prediction of the varietal origin of extra virgin olive oil (EVOO) samples obtained from single olive cultivars, French cultivars Oliviere, Salonenque, and Tanche and Portuguese cultivars Blanqueta, Carrasquenha, and Galega Vulgar, collected in 2016−2017 and 2017−2018 harvest seasons. To pursue this study, spectroscopic approaches based on one-dimensional nuclear magnetic resonance (1D NMR) spectroscopy, namely, 1 H and 13 C NMR distortionless enhancement by polarization transfer (DEPT) 45 pulse sequence, and Fourier transform mid-infrared spectroscopy (FT-MIR) are used in combination with partial least square discriminant analysis (PLS1-DA). The results obtained by PLS1-DA models using 1 H and 13 C NMR DEPT 45 data are compared to those of PLS1-DA models using MIR data. The application of a control chart method allows for the optimization of the interpretation of the PLS1-DA results, and an efficient two-step strategy is proposed to improve the discrimination of the six studied cultivars. Then, NMR and MIR data are combined by either a mid-or high-level data fusion approach to further improve the discrimination. The models are also tested on samples from other cultivars to check their ability to reject varieties that were not considered in the calibration process.
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https://hal-amu.archives-ouvertes.fr/hal-03227165
Contributor : Nathalie Dupuy Connect in order to contact the contributor
Submitted on : Tuesday, May 25, 2021 - 9:52:30 AM
Last modification on : Monday, October 25, 2021 - 4:29:41 PM
Long-term archiving on: : Thursday, August 26, 2021 - 6:02:09 PM

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Astrid Maléchaux, Raquel Garcia, Yveline Le Dréau, Arona Pires, Nathalie Dupuy, et al.. Chemometric Discrimination of the Varietal Origin of Extra Virgin Olive Oils: Usefulness of 13C Distortionless Enhancement by Polarization Transfer Pulse Sequence and 1H Nuclear Magnetic Resonance Data and Effectiveness of Fusion with Mid-Infrared Spectroscopy Data. Journal of Agricultural and Food Chemistry, American Chemical Society, 2021, 69 (14), pp.4177-4190. ⟨10.1021/acs.jafc.0c06594⟩. ⟨hal-03227165⟩

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