CAJ | 학술논문

研究了一种测定盐湖水中铀的含量及234 U/238 U 活度比值的方法。采用 Chelex-100螯合树脂将盐湖水中大量的可溶盐基体与铀分离,钠的消除率大于99.9%,铀的回收率为90.5%~106%,4次平行测定结果的相对标准偏差小于10%。经P350树脂进一步纯化后,由α能谱仪测定234 U/238 U 活度比值,相对标准偏差小于5%(n=3)。研究结果表明,该基体消除法可以用于盐湖水中铀的含量及234 U/238 U 活度比值的测定。该技术已被应用于实际生产中。
연구료일충측정염호수중유적함량급234 U/238 U 활도비치적방법。채용 Chelex-100오합수지장염호수중대량적가용염기체여유분리,납적소제솔대우99.9%,유적회수솔위90.5%~106%,4차평행측정결과적상대표준편차소우10%。경P350수지진일보순화후,유α능보의측정234 U/238 U 활도비치,상대표준편차소우5%(n=3)。연구결과표명,해기체소제법가이용우염호수중유적함량급234 U/238 U 활도비치적측정。해기술이피응용우실제생산중。
A matrix pre-separation method for the determination of uranium content and 234 U/238 U activity ratios in saline waters by ICP-MS andα-spectrometry was studied.The uranium was well pre-separated from saline waters by Chelex-100 resin.The separation efficiency of Na is higher than 99.9%.The recovery of uranium is in the range of 90.5%-106% with sr<10% (n=4).The 234 U/238 U activity ratios were achieved byα-spectrometry after removing the interferences by P350 resin.The results show that the matrix pre-removal method can be well adapted to determine 234 U/238 U activity ratios in saline waters.The sr of 3 times determination is less than 5%.The developed method has been already applied to determine the uranium content and 234 U/238 U activity ratios in real saline waters.