期刊
FOOD CHEMISTRY
卷 170, 期 -, 页码 138-144出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2014.08.051
关键词
Sr-isotope systematics; Prosecco wine; Food traceability; Geographical origin; TIMS
Glera vineyards from the Prosecco wine district in northern Italy have been characterised in terms of the Sr-87/Sr-86 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 Sr-87/Sr-86 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 (Sr-87/Sr-86 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. (C) 2014 Elsevier Ltd. All rights reserved.
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