研究了P507负载泡塑萃取柱吸附、分离和富集稀土元素的条件,确定了地学样品中微量稀土元素的化学前处理方法和中子活化测量条件。方法的RSD在3.4%~10%之间,回收率大于92%。用国家标准物质进行分析验证,测定结果与推荐值相符。 The conditions for adsorption, separation and enrichment of rare earth elements in P507 loaded foam extraction column were studied. The chemical pretreatment methods and neutron activation measurement conditions of trace rare earth elements in geoscience samples were determined. The RSD of the method ranged from 3.4% to 10% with a recovery of over 92%. With the national standard material for analysis and verification, the measured results are consistent with the recommended values.