Casein δ³⁴S of 725 samples of cheese from all over the world were measured using IRMS. δ³⁴S alone made it possible to establish characteristic ranges of values for two types of Italian cheese (Grana Padano PDO and Parmigiano Reggiano PDO) and for the different regions and provinces of both the Grana Padano PDO and the Parmigiano Reggiano PDO zones. Moreover, δ³⁴S of PDO Italian samples were compared to both Italian (not PDO) and foreign competitive cheese samples. In all the cases, sulfur isotopic ratio analysis was a powerful tool to fix characteristic ranges of values for cheeses coming from different countries and to improve the information given by other isotopic parameters.

中文翻译：

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δ34S用于追踪奶酪的起源并检测其真实性。

酪蛋白δ ^34个的奶酪725个取样S从世界各地使用IRMS测定。δ ³⁴ š单独使人们有可能建立值的特性范围为两种类型的意大利干酪（拉纳Padano奶酪PDO和帕马森乳酪PDO）和用于不同区域和拉纳Padano奶酪PDO和帕马森乳酪PDO区两者的省份。此外，Δ ³⁴ PDO意大利样品号第进行了比较，这两个意大利人（不PDO）和外国竞争的奶酪样品。在所有情况下，硫同位素比分析都是确定来自不同国家的奶酪的特征值范围并改善其他同位素参数所提供信息的强大工具。