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用Ｐ５０７萃淋树脂为固定相，ＨＣｌ为流动相，在小柱（７ｍｍ×１０ｍｍ）上试验研究了海水中稀土元素（ＲＥＥ）的分离富集条件以及Ｂａ的干扰消除方法。以５．０ｍＬ／ｍｉｎ的流速大体积（１Ｌ海水）上柱，用５０ｍＬ６ｍｏｌ／ＬＨＣｌ以２．５ｍＬ／ｍｉｎ的流速洗脱，实现了海水中超痕量稀土的分离富集，建立了一个ＩＣＰ＿ＭＳ测定海水中超痕量稀土的新方法。方法的检测限为０．０５～２．６２ｎｇ／Ｌ，标准回收率大于９８％，精密度（ＲＳＤ，ｎ＝７）小于５％。
P507 extraction resin as the stationary phase and HCl as the mobile phase were used to study the separation and enrichment conditions of rare earth elements (REE) in seawater and the interference elimination method of Ba on a small column (7mm × 10mm). The column was eluted with 50mL 6mol / LHCl at a flow rate of 2.5mL / min at a flow rate of 5.0mL / min on a large volume (1L of seawater) to achieve the separation and enrichment of ultra trace trace rare earths in seawater. An ICP-MS determination of seawater A New Method of Super Trace Rare Earths. The detection limit was 0.05 ~ 2.62ng / L, the standard recovery was more than 98% and the precision (RSD, n = 7) was less than 5%.