编辑同志: 柱上萃取色谱分离稀土元素时,料液浓度对轻稀土元素的分离有十分显著的影响。其主要原因是进料过程中,稀土元素被有机相萃取后,所释放的酸使料液酸度增加,从而影响料液中稀土元素继续被有机相萃取。由于各稀土元素被有机相P507萃取的能力不同,所以在同一酸度下,各稀土元素受到的影响大小亦不尽一样。P507萃取轻稀土元素的能力较弱,料液浓度对轻稀土的分离影响尤为突出。本文就提高进料液浓度的措施、注意事项等谈谈自己的体会和经验,以期引起讨论,並予指正。根据资料介绍,柱上萃取色谱分离稀土元素的进 Editor comrades: Column chromatography on the separation of rare earth elements, the feed concentration of light rare earth elements have a very significant impact. The main reason is that during the feed process, the rare earth elements are extracted by the organic phase, the acid released causes the acidity of the feed solution to increase, thus affecting the rare earth elements in the feed solution to continue being extracted by the organic phase. Due to the ability of each rare earth element to be extracted by the organic phase P507, the influence of each rare earth element is also different under the same acidity. The ability of P507 to extract light rare earth elements is weaker. The effect of feed concentration on the separation of light rare earths is particularly prominent. This article to improve the concentration of feed solution measures, matters needing attention to talk about their own experience and experience, with a view to arousing discussion and correction. According to the introduction of information, column chromatography on the separation of rare earth elements