title: An analytical approach to Sr isotope ratio determination in Lambrusco wines for geographical traceability purposes.
abstract: Geographical origin and authenticity of food are topics of interest for both consumers and producers. Among the different indicators used for traceability studies, (87)Sr/(86)Sr isotopic ratio has provided excellent results. In this study, two analytical approaches for wine sample pre-treatment, microwave and low temperature mineralisation, were investigated to develop accurate and precise analytical method for (87)Sr/(86)Sr determination. The two procedures led to comparable results (paired t-test, with t<tcrit). Furthermore, the precision of the whole analytical procedure was evaluated by using a control sample (wine sample), processed during each sample batch (calculated Relative Standard Deviation, RSD%, equal to 0.002%. Lambrusco PDO (Protected Designation of Origin) wines coming from four different vintages (2009, 2010, 2011 and 2012) were pre-treated according to the best procedure and their isotopic values were compared with isotopic data coming from (i) soils of their territory of origin and (ii) wines obtained by same grape varieties cultivated in different districts. The obtained results have shown no significant variability among the different vintages of wines and a perfect agreement between the isotopic range of the soils and wines has been observed. Nevertheless, the investigated indicator was not enough powerful to discriminate between similar products. To this regard, it is worth to note that more soil samples as well as wines coming from different districts will be considered to obtain more trustworthy results.
authors.affiliation: Department of Chemical and Geological Science, University of Modena and Reggio Emilia, via Campi 183, 41125 Modena, Italy.
authors.forename: Caterina
authors.initials: C
authors.lastname: Durante
authors.affiliation: Department of Chemical and Geological Science, University of Modena and Reggio Emilia, via Campi 183, 41125 Modena, Italy.
authors.forename: Carlo
authors.initials: C
authors.lastname: Baschieri
authors.affiliation: Department of Chemical and Geological Science, University of Modena and Reggio Emilia, via Campi 183, 41125 Modena, Italy.
authors.forename: Lucia
authors.initials: L
authors.lastname: Bertacchini
authors.affiliation: Department of Pharmaceuticals Science, University of Modena and Reggio Emilia, via Campi 183, 41125 Modena, Italy.
authors.forename: Davide
authors.initials: D
authors.lastname: Bertelli
authors.affiliation: Department of Chemical and Geological Science, University of Modena and Reggio Emilia, via Campi 183, 41125 Modena, Italy.
authors.forename: Marina
authors.initials: M
authors.lastname: Cocchi
authors.affiliation: Department of Chemical and Geological Science, University of Modena and Reggio Emilia, via Campi 183, 41125 Modena, Italy. Electronic address: andrea.marchetti@unimore.it.
authors.forename: Andrea
authors.initials: A
authors.lastname: Marchetti
authors.affiliation: Centro Interdipartimentale Grandi Strumenti, University of Modena and Reggio Emilia, via Campi 213/A, 41125 Modena, Italy.
authors.forename: Daniela
authors.initials: D
authors.lastname: Manzini
authors.affiliation: Department of Pharmaceuticals Science, University of Modena and Reggio Emilia, via Campi 183, 41125 Modena, Italy.
authors.forename: Giulia
authors.initials: G
authors.lastname: Papotti
authors.affiliation: Department of Chemical and Geological Science, University of Modena and Reggio Emilia, via Campi 183, 41125 Modena, Italy.
authors.forename: Simona
authors.initials: S
authors.lastname: Sighinolfi
mesh_terms: D005638:Fruit / Q000737:chemistry / Q000254:growth & development; D007558:Italy; D008872:Microwaves; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D012987:Soil / Q000737:chemistry; D013325:Strontium Isotopes / Q000032:analysis*; D027843:Vitis / Q000254:growth & development; D014920:Wine / Q000032:analysis* / Q000145:classification*
chemical_list: D012987:Soil; D013325:Strontium Isotopes
keywords: (87)Sr/(86)Sr ratio; Geographic traceability; Lambrusco PDO wines; MC-ICP/MS