title: The (87)Sr/(86)Sr strontium isotopic systematics applied to Glera vineyards: a tracer for the geographical origin of the Prosecco.
abstract: Glera vineyards from the Prosecco wine district in northern Italy have been characterised in terms of the (87)Sr/(86)Sr isotope-ratio of musts from the 2010, 2011 and 2012 vintages, coupled with the isotopic analysis of Sr in the labile fraction of the soils of provenance. For a single vineyard, detailed Sr isotopic analyses were carried out in sequentially extracted soil fractions at three different depths, and in the grape components (skin, seeds, must and stem), in order to verify the lack of Sr isotopic fractionation within the plant. The (87)Sr/(86)Sr in must, seeds and stem overlaps within experimental uncertainties; skins are shifted towards a lower Sr isotopic composition. A large range of Sr isotopic compositions ((87)Sr/(86)Sr between 0.70706 and 0.71215) characterizes musts from the different vineyards, notwithstanding the relatively limited extension of the investigated geographic area. A statistically significant correspondence between the soil labile fraction and must is observed.
authors.affiliation: Dipartimento di Scienze della Terra, Università di Pisa, via S. Maria 53, 56126 Pisa, Italy. Electronic address: riccardo.petrini@unipi.it.
authors.forename: R
authors.initials: R
authors.lastname: Petrini
authors.affiliation: CRA-VIT, viale XXVIII Aprile 26, 31015 Conegliano, Italy.
authors.forename: L
authors.initials: L
authors.lastname: Sansone
authors.affiliation: Dipartimento di Matematica e Geoscienze, Università di Trieste, via Weiss 8, 34127 Trieste, Italy.
authors.forename: F F
authors.initials: FF
authors.lastname: Slejko
authors.affiliation: Dipartimento di Scienze della Terra, Università di Firenze, via La Pira 4, 50121 Firenze, Italy.
authors.forename: A
authors.initials: A
authors.lastname: Buccianti
authors.affiliation: CRA-VIT, viale XXVIII Aprile 26, 31015 Conegliano, Italy.
authors.forename: P
authors.initials: P
authors.lastname: Marcuzzo
authors.affiliation: CRA-VIT, viale XXVIII Aprile 26, 31015 Conegliano, Italy.
authors.forename: D
authors.initials: D
authors.lastname: Tomasi
mesh_terms: D007554:Isotopes / Q000032:analysis*; D007558:Italy; D013324:Strontium / Q000032:analysis*; D014920:Wine / Q000032:analysis*
chemical_list: D007554:Isotopes; D013324:Strontium
keywords: Food traceability; Geographical origin; Prosecco wine; Sr-isotope systematics; TIMS