摘要
试样用HCl溶解,以201×7型阴离子交换树脂除去大量U,用P507萃淋树脂将Sm、Eu和Gd与其他稀土元素分离。以^(147)Sm、^(151)Eu和^(160)Gd作稀释剂,用同位索稀释质谱法分析含Sm、Eu、Gd分别为0.0522、0.0524和0.0609ppm的U_3O_8试样时,精密度分别为±1.2％、±2.0％和±2.7％。本文还试验了无液N_2质谱分析,获得满意的结果。
An improved method of simultaneous determination of trace Sm,Eu,Gd in U3O8 by IDMS was described. The quantity of a sample was 1. 0 g U3O8, 147Sm, 151Eu and l60Gd were used as spikes. The great quantity U and trace elements Fe.Pb were removed by the 201×7 anion-exchange resin. Sm,Eu,Gd were separated from other rare earth elements by P507 extractant-containing resin. The ratios of 147Sm/149Sm,151Eu/153Eu and 158Gd/160Gd were measured by mass spectrometry and the quantities of Sm,Eu and Gd in the sample were calculated. The precisions of the method were +1. 2%, +2. 0% and +2. 7% respectively,as the sample contained 0. 0522 ppm Sm,0. 0524ppm Eu and 0. 0609 ppm Gd. The model ZHT-05A single focusing mass spectrometer with single filament face ionozation source
57was used. Once spread sample on the same filament gave the measurements of these three elements.
出处
《铀矿冶》
CAS
1991年第3期53-58,共6页
Uranium Mining and Metallurgy
关键词
U3O8
稀土
萃淋树脂
质谱
同位素
Mass spectrometry Isotope dilution Trace analysis U_3O_8 Rare earth P507 ex- tractant-containing resin
