Tracing geographical origin of Lambrusco PDO wines using isotope ratios of oxygen, boron, strontium, lead and their elemental concentration

• Published in: Current research in food science 2021-01, Vol.4, p.807-814
• Main Authors: Lancellotti, Lisa, Sighinolfi, Simona, Ulrici, Alessandro, Maletti, Laura, Durante, Caterina, Marchetti, Andrea, Tassi, Lorenzo
• Format: Article
• Language: English
• Subjects: Geographic traceability; Isotopic ratios; Lambrusco PDO wines; MC-ICP/MS
• ISSN: 2665-9271; 2665-9271
• DOI: 10.1016/j.crfs.2021.11.001

Wine identification is one of the most important aspects in the classification of wines and consumer protection. In particular, assuring wine authenticity is a crucial issue on which researchers are focusing on. This study aims to evaluate the feasibility of using chemical (B, Pb and Sr concentration) and isotopic compositions (δ11B, 20yPb/20xPb, 87Sr/86Sr and δ18O) of wine samples to trace their geographic origins. Different PDO Lambrusco wines coming from a confined area of northern Italy were analyzed and all the isotopic systematics were monitored by using a multi collector inductively coupled plasma mass spectrometer (MC-ICP/MS). The obtained results showed that boron isotope ratio measurements led to a satisfactory degree of accuracy and precision (measured value, n = 28, 11B/10B of NIST SRM 951a equal to 4.04343 ± 0.00178, (u = 2s) with a certified value of 4.04362 ± 0.00136 (u = 2s). Furthermore, in the present study, it has been possible to highlight significant differences among samples by means of one-way analysis of variance (ANOVA) and post hoc Tukey-Kramer test. Finally, Principal Component Analysis (PCA) was also carried out in order to evaluate to which extent the different PDOs can be distinguished from each other, taking into account the whole set of geographical origin descriptors. Although δ11B provided more sensitive information, the obtained results highlighted the important to consider the synergistic combination of all the investigated parameters to trace the different samples and the need to combine the obtained values with the same parameters evaluated in the soil, water and fertilizer as well. [Display omitted] •Multi-parameter approach was used to assess wine geographical origin.•Validation of 11B/10B measurements was accomplished by multicollector ICP/MS.•11B/10B, 87Sr/86Sr, 20yPb/20xPb, 18O/16O, and relative elemental content, were measured in Lambrusco PDO wines.•Anova, Tukey-Kramer and multivariate (PCA) analysis was employed to investigate differences and similarities among samples.•Geographic differentiation of PDO wines resulted to be based more on B and Sr variables than Pb and O ones.