Strontium elemental and isotopic signatures of Bordeaux wines for authenticity and geographical origin assessment

Ekaterina N Epova; Sylvain Bérail; Fabienne Séby; Véronique Vacchina; Gilles Bareille; Bernard Médina; Laurence Sarthou; Olivier F X Donard

doi:10.1016/j.foodchem.2019.04.068

Strontium elemental and isotopic signatures of Bordeaux wines for authenticity and geographical origin assessment

Food Chem. 2019 Oct 1:294:35-45. doi: 10.1016/j.foodchem.2019.04.068. Epub 2019 Apr 19.

Authors

Ekaterina N Epova¹, Sylvain Bérail², Fabienne Séby³, Véronique Vacchina⁴, Gilles Bareille⁵, Bernard Médina⁶, Laurence Sarthou⁷, Olivier F X Donard⁸

Affiliations

¹ Institut des Sciences Analytiques et de Physico-Chimie pour l'Environnement et les Matériaux CNRS/University of Pau & Pays Adour, UMR5254, Hélioparc Pau-Pyrénées, 2, Avenue du Président Angot, 64053 Pau Cedex 9, France; Laboratoires des Pyrénées et des Landes, Rue des Écoles, 64150 Lagor, France. Electronic address: [email protected].
² Institut des Sciences Analytiques et de Physico-Chimie pour l'Environnement et les Matériaux CNRS/University of Pau & Pays Adour, UMR5254, Hélioparc Pau-Pyrénées, 2, Avenue du Président Angot, 64053 Pau Cedex 9, France. Electronic address: [email protected].
³ Ultra Traces Analyses Aquitaine (UT2A), Hélioparc Pau-Pyrénées, 2, Avenue du Président Angot, 64053 Pau Cedex 9, France. Electronic address: [email protected].
⁴ Ultra Traces Analyses Aquitaine (UT2A), Hélioparc Pau-Pyrénées, 2, Avenue du Président Angot, 64053 Pau Cedex 9, France. Electronic address: [email protected].
⁵ Institut des Sciences Analytiques et de Physico-Chimie pour l'Environnement et les Matériaux CNRS/University of Pau & Pays Adour, UMR5254, Hélioparc Pau-Pyrénées, 2, Avenue du Président Angot, 64053 Pau Cedex 9, France. Electronic address: [email protected].
⁶ Société des Experts Chimistes de France, Maison de la Chimie, 28 rue Saint Dominique, 75007 Paris, France. Electronic address: [email protected].
⁷ Laboratoires des Pyrénées et des Landes, Rue des Écoles, 64150 Lagor, France. Electronic address: [email protected].
⁸ Institut des Sciences Analytiques et de Physico-Chimie pour l'Environnement et les Matériaux CNRS/University of Pau & Pays Adour, UMR5254, Hélioparc Pau-Pyrénées, 2, Avenue du Président Angot, 64053 Pau Cedex 9, France. Electronic address: [email protected].

PMID: 31126474
DOI: 10.1016/j.foodchem.2019.04.068

Abstract

The ⁸⁷Sr/⁸⁶Sr ratio and Sr concentrations of 43 authentic Bordeaux wines from the world's most prestigious châteaux are presented in the context of their relation to the geographical origin of wine and authenticity. The results demonstrate relatively narrow spans of variabilities observed for ⁸⁷Sr/⁸⁶Sr ratio and Sr concentrations in authentic Bordeaux wines, which can be used with reasonable certainty as specific parameters for identifying regional wineries. For comparison, a set of imitated Bordeaux wines was studied for Sr isotopic and elemental compositions. A significant excess of both parameters in suspicious wines were found in reference to authentic values. Such natural and anthropogenically induced variations offer an enhanced discriminating potential of Sr. The unique Sr binary signature may detect imitated wines and trace genuine products from different regional wineries. The obtained results shown a promising perspective for wine authenticity control by means of Sr isotopic and elemental composition.

Keywords: (87)Sr/(86)Sr isotope ratio; Bordeaux wine; Geographical origin; Multi-collector ICP-MS; Sr concentrations; Terroir; Wine authenticity.

MeSH terms

Farms
Mass Spectrometry
Soil / chemistry
Strontium / analysis*
Strontium Isotopes / analysis
Wine / analysis*

Substances

Soil
Strontium Isotopes
Strontium-86
Strontium-87
Strontium