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报道了以微晶萘作吸附载体，固态萃取分离痕量稀土元素的新方法。在pH5.8～8．6和7．2～8．6时，Sc(3+)和Y(3+)，La(3+)，Eu(3+)，Yb(3+)，Lu(3+)与8-羟基喹啉（oxine）形成的金属螯合物，可被微晶萘固态选择萃取。对影响固态萃取的各种因素进行了考察与优化，发现加入适量的Co(2+)可有效地富集ng·ml(－1)级甚至更低浓度级的稀土元素。当富集倍数为50时，本法测定上述元素的检出限达0．04～0．32ng·ml(－1)，平均相对标准偏差为1．86％～3．78％。
A new method for the separation of trace rare earth elements by microcrystalline naphthalene as adsorption carrier and solid state extraction was reported. At pH 5.8 ~ 8.6 and 7.2 ~ 8.6, Sc (3+) and Y (3+), La (3+), Eu (3+), Yb 3+) and 8-hydroxyquinoline (oxine) formed by the metal chelate, naphthalene solid-state selective extraction. Various factors affecting the solid-state extraction were investigated and optimized. It was found that the addition of the appropriate amount of Co (2+) can effectively enrich rare earth elements of ng · ml -1 or even lower concentrations. When the enrichment multiple is 50, the detection limit of this method is 0.04 ~ 0.32ng · ml -1, the average relative standard deviation is 1.86% ~ 3.78%.