【摘要】 应用微波消解处理样品,电感耦合等离子体质谱法测定,考察了不同产地、不同种类的29种茶叶中的Mg、A l、P、Ca、Cr、Mn、Fe、Co、N i、Cu、Zn、Sr和Pb共13种元素的含量。原始数据经过标准化处理后,结合聚类分析和主成分分析,对来自江西、云南、广东和福建四个地区的茶叶进行了产地判别。对不同种类的茶叶(红茶、绿茶、乌龙茶、黑茶)也进行了区分,结果令人满意。茶叶中矿质元素的含量可做为茶叶产地判别的测量指标之一。更多还原

【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.更多还原