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纸上色层法曾经广泛地用于微量铀的分析,但是该法的缺点是流洗周期过长。最近马克当诺德(Mcdonald)等将纸上色层法作了进一步的改进,他们将离心力作用于纸上色层,这样就大大地缩短了流洗周期,一般在5—20分钟就能完全将混合物分离。实验证明,改进后的方法不影响色层分离的效果。本文试图将纸上色层法和离心分离法结合起来,从含有大量杂质的样品中分离微量的铀。铀的分离是用反相纸上色层法,将磷酸三丁酯(TBP)涂于色层纸上作为固定相,稀硝酸为流
Paper chromatography has been used extensively for the analysis of trace uranium, but the disadvantage of this method is that the wash cycle is too long. Recently, McDonald et al. Further improved the paper color-coating method by applying centrifugal force to the paper color layer, thus greatly shortening the flow-through period, generally 5 to 20 minutes The mixture is separated. Experiments show that the improved method does not affect the effect of chromatographic separation. This paper attempts to combine the method of paper chromatography and centrifugation to separate traces of uranium from samples containing a large amount of impurities. Uranium separation is the use of reverse-color paper chromatography, the TBP coated on the colored paper as a stationary phase, dilute nitric acid as a stream