期刊论文

中文

化学试剂

0258-3283

1991

013

3

132-134

10.13822/j.cnki.hxsj.1991.03.002

本校为第一机构

研究了在非离子表面活性剂Triton X-100存在下,Eu-DBM-TOPO三元配合物在水溶液中进行荧光分析的应用条件。在 pH 7.6～9.3 NH_4Ac 缓冲介质中,配合物的最大特征荧光发射波长为617nm。铕在20×10~(-12)～110×10~(-9)有良好的线性关系。检出下限可达2×10~(-12),并可允许大量共存离子存在。用于纯度为99.99%的氧化钆中痕量铕的测定,结果满意。

In the presence of nonionic surfactant TritonX-100,the conditions of fluorometric analysis ofEu-DBM-TOPO in aqueous solution have beeninvestigated.The suitable acidity range is pH7.6～9.3,NH_4Ac.The maximum characteristicemission wavelength of the ternary complex is617nm.This method shows good sensitivity,selectivity and stability.It can determine 20×10~(-12)europium in the lower limit of the workingcurve and the detection limit of this methodis 2×10~(-12).Trace europium in 99.99% Gd_2O_3can be directly ...