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Application de la métabolomique par spectroscopie RMN 1H à l'authentification des vins

Abstract : In a globalized market where 40% of the wine consumed is imported, traceability control is a major challenge for the wine industry. Wine authentication is the process that can use different analytical methods able to control three fundamental parameters: geographical origin, grape variety and vintage. Quantitative 1H NMR spectroscopy (qNMR) is now considered as a very promising tool for studying wine authenticity. During this thesis, a technique was developed for the determination of 40 major wine compounds by 1H NMR. It allows the acquisition of rich and complex information in a single non-specific analysis. The ability of this technique to authenticate a wine has been demonstrated following a collaboration with Château Mouton-Rothschild, by comparison with official analyses carried out by the DGDDI and DGCCRF of Pessac (SCL).The determination of a compliance threshold has been established by taking into account the natural evolution of bottled wines. A characterization study of Bordeaux red wines was carried out. The singularity of these wines was observed in comparison with other French wines, highlighting the characteristic metabolites of Bordeaux wines. The results provide a global description of the potential of 1H NMR for wine authentication.
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Louis Gougeon. Application de la métabolomique par spectroscopie RMN 1H à l'authentification des vins. Ingénierie des aliments. Université de Bordeaux, 2019. Français. ⟨NNT : 2019BORD0052⟩. ⟨tel-02426222⟩

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