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Analytical and Bioanalytical Chemistry

, Volume 407, Issue 30, pp 9053–9060 | Cite as

Comparative study of 13C composition in ethanol and bulk dry wine using isotope ratio monitoring by mass spectrometry and by nuclear magnetic resonance as an indicator of vine water status

  • Francois GuyonEmail author
  • Cornelis van Leeuwen
  • Laetitia Gaillard
  • Mathilde Grand
  • Serge Akoka
  • Gérald S. Remaud
  • Nathalie Sabathié
  • Marie-Hélène Salagoïty
Research Paper

Abstract

The potential of wine 13C isotope composition (δ13C) is presented to assess vine water status during grape ripening. Measurements of δ13C have been performed on a set of 32 authentic wines and their ethanol recovered after distillation. The data, obtained by isotope ratio monitoring by mass spectrometry coupled to an elemental analyser (irm-EA/MS), show a high correlation between δ13C of the bulk wine and its ethanol, indicating that the distillation step is not necessary when the wine has not been submitted to any oenological treatment. Therefore, the ethanol/wine δ13C correlation can be used as an indicator of possible enrichment of the grape must or the wine with exogenous organic compounds. Wine ethanol δ13C is correlated to predawn leaf water potential (R 2 = 0.69), indicating that this parameter can be used as an indicator of vine water status. Position-specific 13C analysis (PSIA) of ethanol extracted from wine, performed by isotope ratio monitoring by nuclear magnetic resonance (irm-13C NMR), confirmed the non-homogenous repartition of 13C on ethanol skeleton. It is the δ13C of the methylene group of ethanol, compared to the methyl moiety, which is the most correlated to predawn leaf water potential, indicating that a phase of photorespiration of the vine during water stress period is most probably occurring due to stomata closure. However, position-specific 13C analysis by irm-13C NMR does not offer a greater precision in the assessment of vine water status compared to direct measurement of δ13C on bulk wine by irm-EA/MS.

Keywords

Vine water status Carbon 13 isotope ratio Wine ethanol Isotope ratio monitoring mass spectrometry Isotope ratio monitoring 13C nuclear magnetic resonance 

Notes

Compliance with ethical standards

Conflict of interest

The authors declare that they have no competing interests.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2015

Authors and Affiliations

  • Francois Guyon
    • 1
    Email author
  • Cornelis van Leeuwen
    • 2
  • Laetitia Gaillard
    • 1
  • Mathilde Grand
    • 3
  • Serge Akoka
    • 3
  • Gérald S. Remaud
    • 3
  • Nathalie Sabathié
    • 1
  • Marie-Hélène Salagoïty
    • 1
  1. 1.Service Commun des LaboratoiresPessac cedexFrance
  2. 2.Bordeaux Sciences Agro, University of Bordeaux, ISVV, Ecophysiology and Functional Genomics of Grapevines, UMR 1287Villenave d’OrnonFrance
  3. 3.EBSI Team, CEISAM, UMR CNR6230Nantes cedex 3France

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