用非抑型制离子色谱法分离测定了Ｌａ３＋，Ｃｅ３＋，Ｐｒ３＋，Ｎｄ３＋，Ｓｍ３＋和Ｙｂ３＋等６种稀土离子。研究了流动相（乙二胺－柠檬酸、乙二胺－草酸、乙二胺－酒石酸）对稀土离子分离状况的影响，确定分析６种稀土离子的最佳流动相为０．２５ｍｍｏｌ／Ｌ乙二胺－０．５０ｍｍｏｌ／Ｌ柠檬酸（ｐＨ４．５０）。在选定的实验条件下测得了稀土离子的检出限、线性范围、工作曲线和相对标准偏差，应用于农用稀土液的分析，结果良好。方法具有简便、准确等优点。 Six kinds of rare earth ions such as La3 +, Ce3 +, Pr3 +, Nd3 +, Sm3 + and Yb3 + were separated and determined by non-suppressed ion-exchange chromatography. The effects of mobile phase (ethylenediamine - citric acid, ethylenediamine - oxalic acid, ethylenediamine - tartaric acid) on the separation of rare earth ions were studied. The optimum mobile phase for determination of six rare earth ions was 0.25 mmol / L Diamine - 0.50 mmol / L citric acid (pH 4.50). The detection limit, linear range, working curve and relative standard deviation of rare earth ions were measured under the selected experimental conditions, which were applied to the analysis of agricultural rare earths and the results were good. The method is simple, accurate and so on.