TTA-α,α'-联吡啶-吐温60体系荧光分光光度法测定微量铕

Spectrofluorimetric determination of trace amounts of europium with 2-thenoyltrifluoroacetone-α,α'-bipyridine-Tween 60 system

研究了用TTA-α,α′-联吡啶-吐温60体系荧光分光光度法测定Eu(Ⅲ)的最佳反应条件及共存离子的干扰情况。体系的激发波长为342 nm,发射波长为613 nm,工作曲线的线性范围为(0.1～240)×10^(-9)Eu。用此法测定了混合希土氧化物中的铕,结果满意。

The spectrofluorimetric determination ofeuropium with 2-thenoyltrifluoroacetone(TTA)-α,α'-bipyridine-Tween 60 system has beeninvestigated.The fluorescence intensity is a linearfunction of concentration in the range of(0.1～240)×10^(-9) for europium.The excitation andemission wavelengths of this system are 342nmand 613 nm,respectively.This method is simple and rapid,and it hasbeen applied to determine trace europium inmixed rare earth oxides with satisfactory results.