Lancellotti Lisa, D'Eusanio Veronica, Manzini Daniela, Durante Caterina, Marchetti Andrea, Tassi Lorenzo
Centro Interdipartimentale Grandi Strumenti (CIGS), University of Modena and Reggio Emilia, Via G. Campi 213/A, 41125 Modena, Italy.
Department of Chemical and Geological Sciences, University of Modena and Reggio Emilia, Via G. Campi 103, 41125 Modena, Italy.
Foods. 2025 Apr 24;14(9):1492. doi: 10.3390/foods14091492.
This study investigates the potential of strontium isotopes as a geographical tracer for Vignola cherries. Despite several studies having employed this indicator to trace the origin of food products, the mechanisms underlying the fractionation and translocation of strontium from soil to edible parts remain poorly understood. In this study, the Zr/Zr ratio was used as a normalization pair to correct measurements of Sr/Sr and Sr/Sr (δSr). Soil, cherry branches, and fruit samples were collected from various producers and locations. Isotopic analyses were carried out using a double-focusing multi-collector-inductively coupled plasma/mass spectrometer (MC-ICP/MS). External correction was applied using the Zr/Zr ratio, assuming both equal and different fractionation factors for Sr and Zr isotopes. Results from both correction models showed improved accuracy by accounting for fluctuations in instrumental mass bias. Regarding the translocation of strontium, the data indicate an increase in Sr of approximately 0.2‱ from soil to plant tissue. This trend was consistent across all sampled locations.
本研究调查了锶同位素作为维尼奥拉樱桃地理示踪剂的潜力。尽管已有多项研究使用该指标来追溯食品的产地，但对于锶从土壤到可食用部分的分馏和转运机制仍知之甚少。在本研究中，Zr/Zr比率用作归一化对，以校正Sr/Sr和Sr/Sr（δSr）的测量值。从不同生产商和地点采集了土壤、樱桃树枝和果实样本。使用双聚焦多接收器电感耦合等离子体/质谱仪（MC-ICP/MS）进行同位素分析。使用Zr/Zr比率进行外部校正，假设Sr和Zr同位素的分馏因子相等或不同。两种校正模型的结果均表明，通过考虑仪器质量偏差的波动，提高了准确性。关于锶的转运，数据表明从土壤到植物组织的Sr增加了约0.2‱。这一趋势在所有采样地点都是一致的。
