滇西茶产区普洱茶中稀土元素及其氧化物含量分布调查  

Investigation of Rare Earth Elements and Oxides in Puer Tea from Western Tea Production Areas of Yunnan Province

作　　者：缪德仁[1] 杨婉秋[1] MIAO Deren;YANG Wanqiu(Department of Chemical Science and Technology,Kunming University,Kunming,Yunnan,China 650214)

机构地区：[1]昆明学院化学科学与技术系,云南昆明650214

出　　处：《昆明学院学报》2018年第6期27-31,共5页Journal of Kunming University

基　　金：第六批云南省高校重点实验室建设项目"云南省高校食品安全检测技术重点实验室"

摘　　要：采用ICP-MS测定法对滇西的临沧、大理、保山和德宏4个茶产区50件普洱茶样品中的16种稀土元素(REEs)的含量进行分析.结果表明,各样品中Ce含量最高,Lu和Tm含量最低,样品中各REEs含量由高到低的顺序为:w(Ce)> w(La)> w(Nd)> w(Y)>> w(Pr)> w(Sm)≈w(Gd)≈w(Sc)> w(Dy)>w(Yb)≈w(Er)> w(Eu)> w(Ho)> w(Tb)> w(Tm)> w(Lu).各茶叶中稀土氧化物含量(REOs)分析结果显示,77. 8%的普洱熟茶和6. 3%的普洱生茶中REOs均超过2. 0 mg/kg.造成不同产区茶叶中REOs含量比例差异的原因有待进一步深入研究.The16rare earth elements(REEs)in50Pu'er tea samples,collected from western tea production areas of Yunnan Province(Lincang,Dali,Baoshan and Dehong),were analyzed by using ICP-MS analysis method.The results showed that the concentration of Ce is the highest in the whole REEs,and the Lu and Tm are the lowest.The concentration of REEs in the descending order is w(Ce)>w(La)>w(Nd)>w(Y)>>w(Pr)>w(Sm)≈w(Gd)≈w(Sc)>w(Dy)>w(Yb)≈w(Er)>w(Eu)>w(Ho)>w(Tb)>w(Tm)>w(Lu).The results of total rare earth oxide(REOs)analysis indicated that the concentrations of REOs are both higher than2.0mg/kg in the77.8%of Pu'er ripe tea and the6.3%of Pu'er raw tea.Further study should be conducted to insight the reasons caused the difference of the ratio of REOs in the different tea production areas.

关 键 词：滇西茶产区 普洱茶 稀土元素 稀土氧化物 

分 类 号：TS272.7[农业科学—茶叶生产加工]