数字农科院2.0

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

作者机构：

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

期刊名称： Food Control

ISSN： 0956-7135

年卷期： 2025 年 180 卷

页码：

收录情况： SCIE（2025版）

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, δ13C, and δ15N 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, δ13C, and δ15N, 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 (δ13C, Ba, δ15N, 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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