铽Ⅲ-均苯四甲酸-对苯二甲酸多核体系的荧光增强及其应用  

Fluorescence enhancement of Tb^(3+)-pyromellitic acid-terephthalic acid system and its application

作　　者：赵学辉[1] 湛雪飞[2] 焦飞鹏[1] 彭霞辉[1] 黄可龙[1] 

机构地区：[1]中南大学化学化工学院,湖南长沙410083 [2]长沙理工大学,湖南长沙410077

出　　处：《冶金分析》2005年第6期26-28,共3页Metallurgical Analysis

基　　金：湖南省教育厅科研项目(01C030)

摘　　要：研究表明,在铽Ⅲ-均苯四甲酸(PMA)-对苯二甲酸(TPA)体系中加入一定量三苯基氧化膦(TPPO)能使体系荧光强度增大约一个数量级,稀土离子La3+,Gd3+,Y3+与Tb3+-PMA-TPA-TPPO形成的多核发光体系,具有很强的发光效果,据此建立了测定稀土样品中痕量铽的新方法,并且优化了最佳反应条件。方法线性范围为8.0×10-9~2.0×10-6mol/L,检出限为6.0×10-11mol/L,用于人工合成稀土混合物样品的分析,结果满意。The study indicates that the fluorescence intensity of Tb^3＋ - pyromellitic acid（PMA） - terephthalic acid（TPA） system was enhanced about one order of magnitude when the system was treated with triphenylphosphine oxide （TPPO）. The fluorescence of Tb^3＋ - PMA - TPA - TPPO system was very strong in the presence of ions, such as Gd^3＋, Y^3＋ and La^3＋, owing to the chemiluminescence. Based on this, a new method for determination of trace terbium in rare earth sample was developed, and the optimal conditions were investigated. The linear range and detection limit of the method for Tb^3＋ were 8.0×10^-9 - 2.0×10^-6 mol/L, 6.0×10^-11 mol/L, respectively. The method has been applied to the determimtion of trace terbium in rare earth compound with satisfactory results.

关 键 词：均苯四甲酸 对苯二甲酸 铽 三苯基氧化膦 荧光光谱 

分 类 号：O657.3[理学—分析化学]