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Trace Element Determination in Teas and Discrimination Analysis for Teas

Kang HaiNing, Yang Miao-feng, Bo Chen, Chao Han, Ling Wang, Xiaoru Wang

Open publisher page 6 citations

Abstract

The content of mineral elements in 29 tea samples from different areas(Jiangxi,Yunnan,Guangdong and Fujian),including green,black,oolong and dark tea,were analyzed.Mg,Al,P,Ca,Cr,Mn,Fe,Co,Ni,Cu,Zn, Sr,Pb were determined by ICP-MS after digesting by microwave digestion oven.Cluster analysis and principal component analysis(PCA) were applied to differentiate the tea varieties and their geographical origin.The classification performance was fair for these two methods.The content of the mineral elements in teas were good chemical descriptors for differentiating their geographical origins.

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What this paper is about

The content of mineral elements in 29 tea samples from different areas(Jiangxi,Yunnan,Guangdong and Fujian),including green,black,oolong and dark tea,were analyzed.Mg,Al,P,Ca,Cr,Mn,Fe,Co,Ni,Cu,Zn, Sr,Pb were determined by ICP-MS after digesting by microwave digestion oven.Cluster analysis and principal component analysis(PCA) were applied to differentiate the tea varieties and their geographical origin.The classification performance was fair for these two methods.The content of the mineral elements in teas were good chemical descriptors for differentiating their geographical origins.

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OpenAlex reports 6 citations for this work. Citation counts describe recorded attention and do not establish research quality.

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Available abstract

The content of mineral elements in 29 tea samples from different areas(Jiangxi,Yunnan,Guangdong and Fujian),including green,black,oolong and dark tea,were analyzed.Mg,Al,P,Ca,Cr,Mn,Fe,Co,Ni,Cu,Zn, Sr,Pb were determined by ICP-MS after digesting by microwave digestion oven.Cluster analysis and principal component analysis(PCA) were applied to differentiate the tea varieties and their geographical origin.The classification performance was fair for these two methods.The content of the mineral elements in teas were good chemical descriptors for differentiating their geographical origins.

Key concepts: Black tea, Principal component analysis, Chemistry, Trace element, Mineral, Green tea, Microwave digestion, Mineralogy

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