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Effects of geographical origin, variety, harvest season, and their interactions on stable isotopes and multi-elements in tea

文献类型： 外文期刊

作者： Wang, Xiao-Li 1 ; Zhang, Bo-Wen 3 ; Wu, Ya-Nan 1 ; Hao, Yan-Bo 1 ; Chen, Xue-Jiao 1 ; Jiang, He-Yuan 3 ; Liu, Hong-Yan 3 ;

作者机构： 1.Xihua Univ, Sch Food & Bioengn, Chengdu 610039, Peoples R China

2.Food Microbiol Key Lab Sichuan Prov, Chengdu 610039, Peoples R China

3.Chinese Acad Agr Sci, Inst Urban Agr, Chengdu Natl Agr Sci & Technol Ctr, Res Ctr Plants & Human Hlth, Chengdu 610213, Peoples R China

关键词： Green tea; Traceability; Mineral element content; Stable isotope ratio

期刊名称：FOOD CONTROL （ 影响因子：6.3； 五年影响因子：6.1 ）

ISSN： 0956-7135

年卷期： 2026 年 180 卷

页码：

收录情况： SCI

摘要： The counterfeiting of Protected Geographical Indication (PGI) labeled tea has raised concerns regarding its authenticity and geographical origin. In order to trace the geographical origins of Sichuan PGI tea, the mineral elemental contents, delta C-13, and delta N-15 of tea were analyzed. Significant variations were observed in these parameters across different geographical origins and seasons, with only 13 elements differing between tea varieties. Geographical location had the strongest influence on 16 elemental contents, delta C-13, and delta N-15, and seven elements (Fe, Cu, As, Rb, Cd, Cs, and Y) in tea showed significant positive correlations with their respective soil concentrations. Eight key variables (delta C-13, Ba, delta N-15, Ca, Cs, Cd, Y, and Sr) were selected for discriminating geographical origins, and 100 % correct discrimination rates were obtained for both original and cross-validation. This study showed that stable isotopes and mineral elements could effectively identify tea geographical origins with a small spatial scale.

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