镧、轧、镥、钇和钪与铽-乙酰水杨酸共发荧光体系的研究和应用  

Fluorescence Enhancement Effect of Terbium-Acetylsalicylic Acid System by Lanthanides and Its Application

作　　者：尹洪宗[1] 崔彦[1] 曲祥金[1] 周杰[1] 朱贵云[2] 司志坤 

机构地区：[1]山东农业大学基础部,泰安271018 [2]山东大学化学系,济南250100

出　　处：《分析化学》1998年第8期985-988,共4页Chinese Journal of Analytical Chemistry

摘　　要：研究发现，镧、轧、镥、钇和钪５种稀土离子可以分别与铽－乙酰基水杨酸形成优良的 共发荧光体系。在最佳条件下，５种离子可分别使铽－乙酰水杨酸体系的荧光增强３５０、５８、 １０８、７３和４０倍。分别研究了各共发光体系的形成条件、荧光特点和影响因素。利用铽－镧－乙 酰水杨酸体系，可使铽的检测限降到３．０×１０－１０ｍｏｌ／Ｌ，铽浓度在５．０×１０－９～３．０×１０－６　ｍｏｌ／Ｌ 范围内与荧光强度呈线性关系。应用于稀土合成样品和包头稀土标准氧化物中的铽的测定， 结果满意。回收试验的回收率为９３％±４．２％。分析各体系后，对共发荧光的机理进行了初 步的探讨。A fluorescence enhancement effect produced by adding La3+ 、Gd3+、Lu3+ 、LU3+、Y3+ or Sc3+ on ter- bium-acetylsalicylic acid(ASA) was observed. The fluorescence intensity was enhanced about 2 others of magnitude compared with the system without them. The new system-Tb-La-ASA was used for the determi- nation of trace terbium in foe range of 5 .0 ×10-9 ～3 .0 × 10-6 mol/L, and the detection limit was 3.0 × 10-10 mol/L. The standard addition method was applied to determine the terbium in synthetic sample and standard sample. The recovery test gave satisfactory results. The luminescence mechanism of the systems was discussed.

关 键 词：铽 镧 钆 镥 钇 钪 ASA 共发荧光体系 测定 

分 类 号：O614.341[理学—无机化学]