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本文研究了5208萃淋树脂(异烷基膦酸二丁酯)分离富集钍的效果:经柱色层分离后钍能100%回收,并且钍容易洗脱;100毫克铀、50毫克钛、30毫克稀土、20毫克锆及大量的其它杂质元素不影响测定钍。拟定了岩石矿石中钍的测定方法,该法上柱酸度较低,操作简便,适应性广,测定范围为千分之几到百万分之几的钍。
In this paper, the effect of separation and enrichment of thorium on 5208 extraction resin (dibutyl isoalkylphosphonate) was studied: Thorium can be recovered 100% after separation by column chromatography and thorium is easy to elute; 100 mg uranium, 50 mg titanium, Thirty milligrams of rare earth, 20 milligrams of zirconium and a large amount of other impurity elements do not affect the determination of thorium. The method for determination of thorium in rock ores is proposed. The method has the advantages of lower acidity, simple operation, wide adaptability, and the determination range is from a few thousandths to several parts per thousand thorium.