Determination of REEs in highly mineralized water by cloud point extraction-inductively coupled plasma mass spectrometry

This study determined the contents of rare earth elements in highly mineralized water using inductively coupled plasma mass spectrometry with cloud point extraction. Hydrophobic complex, generated from the rare earth elements in high salinity water and 8-hydroxyquinoline, was extracted into tritonx-114 surfactant phase by water bath heating. Analysis of the main factors affecting the extraction efficiency of turbidity point shows that the detection limits are 0.002～0.005 μg/L, the recovery of actual water samples ranges from 93.3%～107.1% and the measured relative RSD values are 2.12%～3.53%.