全自动消解—ICP-MS法检测不同茶叶中的稀土含量  

Determination of Rare Earth Elements in Different Types of Tea by ICP-MS with Full Automatic Digestion for Preparation

作　　者：郝伟[1] 何咏[1] 陈雪[1] 李烨[1] 

机构地区：[1]北京市环境保护科学研究院国家城市环境污染控制工程技术研究中心,北京100037

出　　处：《昆明学院学报》2016年第3期39-42,共4页Journal of Kunming University

摘　　要：运用全自动消解—ICP-MS对5种不同茶叶16种稀土元素（Sc,Y,La,Ce,Pr,Nd,Sm,Eu,Gd,Tb,Dy,Ho,Er,Tm,Yb,Lu）进行检测.结果表明,方法相关系数为0.999 7~0.999 9,检出限低,一般都在ng/L级别,加标回收率和精密度（RSD）分别为92.9%~110.7%和0.24%~4.41%.5种茶叶稀土氧化物总量为0.749~3.486 mg/kg,其中轻稀土元素（La,Ce,Pr,Nd,Sm）和Y含量较高,占稀土总量的80%以上.此方法操作简便,准确度和精密度高,是检测不同茶叶中稀土元素含量的一种可行性方法 .Five different types of tea were decomposed with full automatic digestion,and 16 REEs（ Sc,Y,La,Ce,Pr,Nd,Sm,Eu,Gd,Tb,Dy,Ho,Er,Tm,Yb,Lu） were analyzed by ICP-MS. The results showed that the correlation coefficients are 0. 999 7—0. 999 9 with low detection limit at the level of ng / L. The recoveries and precisions are 92. 9% —110. 7% and 0. 24% —4. 41% respectively. The contents of the rare earth oxides are 0. 749—3. 486 mg / kg in tea samples,and the content of LREEs（ La,Ce,Pr,Nd and Sm） and Y is relatively high,accounting for more than 80% of the total REEs. This is a simple and feasible method with high accuracy and high precision to analyze the content of REEs in different kinds of tea.

关 键 词：茶叶 稀土 ICP-MS 全自动消解 

分 类 号：TS272.7[农业科学—茶叶生产加工]