FETV-ICP-AES直接测定中药漏芦中微量稀土元素的研究  

Study on Direct Determination of Trace Rare Earth Elements in Chinese Medicine Loulu by FETV-ICP-AES with PTFE Slurry Modifier

作　　者：丁健华[1] 陈世忠[2] 廖振环[2] 江祖成[2] 

机构地区：[1]佛山科技学院,佛山528000 [2]武汉大学化学与环境科学学院,武汉430072

出　　处：《分析试验室》2000年第6期1-4,共4页Chinese Journal of Analysis Laboratory

基　　金：国家自然科学基金!资助项目 ( 2 98750 2 2 )

摘　　要：提出了以聚四氟乙烯悬浮液为氟化剂 ,氟化电热蒸发 (FETV)等离子体发射光谱法 (ICP- AES)直接测定中药漏芦中微量稀土元素 La、Eu、Yb和 Y的方法。改进了 ETV与 ICP之间的气路接口 ,研究了影响待测元素信号强度的有关因素。在优化实验条件下 ,方法的检出限为 1 .0～ 3.8ng/m L,相对标准偏差为 2 .7%～ 4.4%。此法已应用于中药漏芦中微量稀土元素的测定。A method was described for direct determination of trace rare earth elements (La,Eu,Yb and Y) in Chinese medicine Loulu by fluorination assisted electrothermal vaporization inductively coupled plasma atomic emission spectrometry(FETV ICP AES) with slurry sampling. A polytetrafluorethylene(PTFE) emulsion was used as a fluorinating reagent to promote the vaporization of the analytes in graphite furnace. The main factors affecting the analytical signals were studied. The detection limits for the determination of La,Eu Yb and Y are 3.8,2.3, 1.0 and 1.2 ng/mL,respectively; the relative standard deviations are less then 4.4% ( n =11); the recovery are in the range of 95%～110%. The proposed method was applied to direct determination of trace rare earth elements in Chinese medicine Loulu with satisfactory results.

关 键 词：ICP-AES 稀土元素 漏芦 中药 微量分析 FETV 

分 类 号：R284.1[医药卫生—中药学] O657.31[医药卫生—中医学]