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为寻找有效且简单的克服基体效应的方法,我们研究了树脂吸附铀的行为:742阴离子树脂具有孔径大,吸附洗脱快等优点,本文择其吸附快之长处,对少量粉末状742树脂(280目以上)吸附铀的可能性进行了探索试验,富集分离效果良好。最终拟定在硫酸介质中以742阴离子树脂静态吸附分离铀,X-射线测量的方法,操作简单易行,方法灵敏度高、稳定。适应于地质、选冶样品中0.00X～X％铀的测定。0.138％的样品测定15次,计算其标准偏差为0.0027,变动系数为1.98％。
In order to find an effective and simple way to overcome the matrix effect, we studied the behavior of resin adsorption of uranium: 742 anion resin has the advantages of large pore size, fast adsorption and elution, this paper choose the advantages of fast adsorption, a small amount of powdery 742 resin ( 280 mesh or more) to explore the possibility of uranium exploration and testing, enrichment and separation effect is good. Finally, a method of static adsorption separation of uranium and X-ray with 742 anion resin in sulfuric acid medium is proposed. The method is simple and easy to operate with high sensitivity and stability. Adapt to the determination of 0.00X ~ X% uranium in geological samples. 0.138% of the samples were measured 15 times, the calculated standard deviation of 0.0027, coefficient of variation of 1.98%.