关键词: 绿茶, 产地, 矿物元素, 溯源

Abstract: [Objective] The objective of this study was to measure mineral element analysis for identifying the geographical origin of tea and to select the effective indicators. [Method] The concentrations of nine mineral elements(e.g., K, Ca, Mg and Mn) in 35 green tea samples from four main production areas in the Hubei province were analyzed using inductively coupled plasma-atomic emission spectrometry(ICP-AES). [Results] Element contents of teas from different regions were different. Most of the samples were classified correctly by principal component analysis(PCA), 6 key variables(K, Ca, Mg, Mn, Fe and Mo) were identified by stepwise discriminant analysis. The discriminant model had a 100% correct classification. [Conclusion] Green tea samples from different tea plantations in the Hubei can be classified correctly by mineral element analysis.

Key words: green tea, geographical origin, mineral element, traceability