Elemental Profile and 87Sr/86Sr Isotope Ratio as Fingerprints for Geographical Traceability of Wines: an Approach on Romanian Wines

• Published in: Food analytical methods Vol. 10; no. 1; pp. 63 - 73
• Main Authors: Geană, Elisabeta-Irina, Sandru, Claudia, Stanciu, Vasile, Ionete, Roxana Elena
• Format: Journal Article
• Language: English
• Published: New York Springer US 01.01.2017; Springer Nature B.V
• Subjects: Acid digestion; aluminum; Analytical Chemistry; atomic absorption spectrometry; Calcium; Carboxylic acids; cation exchange chromatography; Cation exchanging; Chemical composition; Chemistry; Chemistry and Materials Science; Chemistry/Food Science; EDTA (chelating agent); elemental composition; Ethylenediaminetetraacetic acids; Food safety; Food Science; Gallium; Inductively coupled plasma mass spectrometry; Isotope ratios; isotopes; Mass spectrometry; Microbiology; Multivariate analysis; Organic chemistry; provenance; Quadrupoles; Romania; Rubidium; strontium; Strontium 87; Strontium isotopes; traceability; tracer techniques; Tracers; wet digestion method; Wines; Romania; Wine; Elemental composition; Geographic origin; Sr isotope ratio; Sr
• ISSN: 1936-9751; 1936-976X
• DOI: 10.1007/s12161-016-0550-2

Wine geographical traceability is an important topic in the context of wine authentication and for that, many researchers worldwide have addressed this subject by developing different methodologies based on multivariate analysis of natural chemical composition data (inorganic or organic parameters) and isotopic signature. The goal of this work was to assess the potential of elemental composition and strontium isotope ratio ( 87 Sr/ 86 Sr) of wines from important wine-producing regions in Romania, located in relatively small geographical areas, in order to highlight reliable markers for wine geographical origin discrimination. Elemental profile determinations were performed by ICP-MS, GFAAS, and FAAS techniques after microwave acid digestion of the wine samples. The 87 Sr/ 86 Sr isotope ratio of the resulted extracts was determined by quadrupole inductively coupled plasma mass spectrometry (Q-ICP-MS), after separating strontium and rubidium using cation-exchange chromatography with Dowex 50W-X8 resin and the complexation ability of the carboxylic acid EDTA. The variation of elemental composition (Ga, Sr, and Al), Ca/Sr ratio, and the 87 Sr/ 86 Sr ratio of the investigated wine clearly demonstrated that these variables are suitable tracers for wine geographic origin determination. The proposed methodology allowed a 100 % successful classification of wines according to the region of provenance.