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Rare earth elements (REEs) in seawater were preconcentrated 20-fold (from 50 to 2.5ml) by a chelating resin-packed minicolumn device and determined by inductively coupled plasma mass spectrometry (ICP-MS). The recoveries for REEs were in the range from 90% for Eu and Dy to 98% for Yb, and their standard deviations were less than 4%. The lower detection limits for REEs ranged from 0.06ngl −1 ...
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