An analytical approach to Sr isotope ratio determination in Lambrusco wines for geographical traceability purposes

•A low temperature digestion procedure was tested for wines mineralisation.•Modena Lambrusco PDO wines collected from four vintages, 2009–2012, were analysed.•Results were compared with isotopic values of soils and wines coming from different district.•Tracing and discriminatory power of 87Sr/86Sr was investigated. Geographical origin and authenticity of food are topics of interest for both consumers and producers. Among the different indicators used for traceability studies, 87Sr/86Sr 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 87Sr/86Sr determination. The two procedures led to comparable results (paired t-test, with t