Effects of sampling time and location on the geographical origin traceability of protected geographical indication (PGI) Hongyuan yak milk: Based on stable isotope ratios

文献类型： 外文期刊

第一作者： Li, Yalan

作者： Li, Yalan;Yang, Xiaoting;Zhao, Shanshan;Zhao, Yan;Zhang, Zixuan;Bai, Lu;Zhaxi, Pengcuo;Qu, Song

作者机构：

关键词： Geographic origin traceability; Hongyuan yak milk; Protected geographical indication (PGI); Sampling location; Sampling time; Stable isotope ratios

期刊名称：FOOD CHEMISTRY （ 影响因子：8.8； 五年影响因子：8.6 ）

ISSN： 0308-8146

年卷期： 2024 年 441 卷

页码：

收录情况： SCI

摘要： Hongyuan yak milk is a protected geographical indication (PGI) product of rich nutritional value, which is popular among consumers. Stable isotope ratio analysis (SIRA) is an effective way to protect the authenticity of the geographical origin of PGI products, and it is crucial to study the factors affecting stable isotopes. Firstly, we proved that the SIRA could be used to identify the geographical origin of Hongyuan yak milk, and that the identification accuracy in combination with delta 13C and delta 18O was 100 %. Secondly, we analyzed the effect of sampling selection on the stable isotopes of Hongyuan yak milk in practical applications, which showed that sampling time influenced the delta 13C, delta 2H, and delta 18O, while the sampling locations did not. There were interactions between the effect of sampling time and location on delta 2H and delta 18O. These results provide a reliable method for identifying PGI products and also provide new guidance on sampling models.

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