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The assessment of wine authenticity is of utmost importance in the current context of a growing market globalization. The strontium isotopic ratio  87 Sr/ 86 Sr is a well-established tool for dating and tracing the origin of rocks and minerals with special interest for wine traceability. A study was developed to examine the variation of  87 Sr/ 86 Sr in wines from Douro Valley taking into account the effects of vineyard location and grape variety. The  87 Sr/ 86 Sr of soils and wines from six vineyards were determined by using an ICP-MS based analytical procedure. A total of twenty-two monovarietal wines, obtained at micro vinification scale, from relevant white and red grapevine varieties for Douro region, were analysed. The range of  87 Sr/ 86 Sr values observed in soils and wines was of 0.708–0.725 and 0.711–0.717, respectively. The present study updates the scarce knowledge available on strontium isotopic ratios in soils and wines from Douro Valley, and its results will enlarge global databank on wine composition and support comparison with other world regions.

87Sr/86Sr isotopic ratios in vineyard soils and varietal wines from Douro Valley

⁸⁷Sr/⁸⁶Sr isotopic ratios in vineyard soils and varietal wines from Douro Valley