University of Modena and Reggio Emilia, Department of Chemistry, via G. Campi 183, 41125 Modena, Italy.
Food Chem. 2013 Dec 1;141(3):2779-87. doi: 10.1016/j.foodchem.2013.05.108. Epub 2013 Jun 1.
The main goal of this study was to evaluate (87)Sr/(86)Sr ratio in different matrices, namely soils, branches, and grape juices, of an oenological food chain in order to develop a robust analytical strategy able to link the investigated food to its territory of origin. The (87)Sr/(86)Sr has been used as traceability marker and several aspects, affected its variability, i.e. geological features of the investigated area, the bio-available fraction of elements in the soils and the up-take of the plant, have been taken into account. Optimisation of an analytical procedure for the separation of Sr from its interferences and investigation of the analytical performances in terms of precision of used methodology have been carried out as well. This work highlighted a good match between the isotopic values monitored in the bio-available fraction of soils and their respective grape juices for almost all the investigated areas. The correlation with food satisfyingly improves when isotopic relative abundance values of branches vine are considered.
本研究的主要目的是评估（87）Sr/（86）Sr 比值在不同基质中的变化，即酒用食品链中的土壤、树枝和葡萄汁，以开发一种稳健的分析策略，能够将所研究的食品与其产地联系起来。（87）Sr/（86）Sr 被用作示踪剂，考虑了多个因素，这些因素影响了其变异性，例如研究区域的地质特征、土壤中元素的生物可利用部分和植物的吸收。还对 Sr 与其干扰物的分离分析程序进行了优化，并对所用方法的精度进行了分析性能的研究。这项工作表明，在所研究的几乎所有地区，土壤中生物可利用部分监测到的同位素值与各自的葡萄汁之间存在良好的匹配。当考虑树枝的同位素相对丰度值时，与食品的相关性得到了令人满意的改善。
