ArticleFoods (Basel, Switzerland)2025
Effects of Region, Processing, and Their Interaction on the Elemental Profiles of Pu-Erh Tea.
Article in Foods (Basel, Switzerland), 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Elemental contents are effective fingerprints for Pu-erh tea's geographical traceability, which is crucial for consumer protection and sustainable development. Region and processing methods are key factors influencing the tea's elemental fingerprint. This study analyzed 28 elements in Pu-erh tea samples from three Yunnan production regions subjected to different processing stages in the year of 2023. The results show that significant regional differences were observed for 25 of the 28 elements. As, Li, Cu, Zn, and Cd contents vary significantly during processing. The contents of 27 elements (excluding Pb) are significantly influenced by the interaction between region and processing stage. Orthogonal partial least squares discriminant analysis (OPLS-DA) achieved good validation (Q
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