氨基多羧酸类荧光分析法同时测定钆、铽

SPECTROFLUORIMETRIC DETERMINATION OF GADOLINIUM AND TERBIUM WITH AMINOPOLYCARBOXYLIC ACID

本文以乙二醇二乙醚二胺四乙酸(EGTA)、三乙四胺六乙酸、亚胺基二乙酸及羟乙基亚胺基二乙酸等氨基多羧酸类为荧光试剂,研究了荧光法测定钆、铽的最佳条件。通过比较,确定以 EGTA 体系为最佳,测定钆、铽的绝对检测限分别达到0.2和0.0025μg/ml。并将该法成功地应用于稀土氧化物中钆、铽的同时测定。

Fluorimetric determination of Gd^(3+),Tb^(3+) with ethy leneglycol- bis(aminoethy lether)-tetraacetic acid(EGTA);N-(2-Hydroxye thyl) iminodiacetic acid(HIMDA);Iminodiacetic acid(IMDA);triethylene- tetraamine hexaacetic acid(TTHA)as fluorescent reagents have been studied in this paper.By comparision,EGTA is determined as the best fluorescent reagent,and the optimal conditions of fluo- rimetric determination of Gd^(3+) Tb^(3+) have been proposed.The absolute determination limit of Gd^(3+),Tb^(3+) is 0.2 and 0.0025 μg/ml, respectively.Using this method to analyse the amount of Gd^(3+), Tb^(3+) in rare earth oxides have been proved to be satisfactory.