中国茶叶2025，Vol.47Issue(11)：34-40,7.
武夷岩茶元素指纹特征及产地溯源研究
Study on the Element Fingerprint and Geographical Traceability of Wuyi Rock Tea
摘要
Abstract
Wuyi rock tea is a traditional Chinese famous tea.This study analyzed the element content differences in rock tea from different producing areas,and constructed a discrimination model to identify the geographic origin of rock tea.This model provided technical support for protecting the geographic indication of Wuyi rock tea.We used inductively coupled plasma mass spectrometry(ICP-MS)to analyze 39 elements in 50 tea samples from different producing areas.Principal component analysis(PCA),orthogonal partial least squares discriminant analysis(OPLS-DA),and decision tree(DT)algorithms were used to obtain the geographic origin discrimination model.The contents of essential elements for human body in rock tea showed a trend of magnesium>manganese>iron>zinc>copper>nickel>cobalt>selenium.The contents of heavy metals such as lead,cadmium,chromium,and arsenic were relatively low in Wuyi rock tea.The content of light rare earth element cerium was the highest(522.9 ug/kg)in Wuyi rock tea.T-test analysis results indicate that Wuyi rock tea had unique element fingerprint,and the contents of zinc,lead,cadmium,scandium,antimony,thallium and bismuth elements in rock teas between two regions had significant differences(P<0.05).The OPLS-DA model can effectively distinguish Wuyi rock tea from non-geographical origin rock tea.The DT model identified two main con-tributing elements,Sb and V,and obtained a classification rule with a tree depth of 3.The average accuracy of the ten-fold cross validation was 92.5%.We successfully established a method for tracing the origin of Wuyi rock tea in a small-scale space based on element fingerprint.关键词
武夷岩茶/元素/正交偏最小二乘法判别分析/决策树/产地溯源Key words
Wuyi rock tea/elements/OPLS-DA/DT/geographic origin分类
农业科学引用本文复制引用
梁思辰,马桂岑,冯新玥,黄聪薇,孙建星,付周平,孙洪峰,陈红平..武夷岩茶元素指纹特征及产地溯源研究[J].中国茶叶,2025,47(11):34-40,7.基金项目
国家重点研发计划项目(2022YFF0606800) （2022YFF0606800）
