Determination of trace rare earth elements, Sc, and Y in ground water by inductively coupled plasma mass spectrometry with preconcerntration method

A method for the determination,of ultra-trace rare earth elements (REs), Sc and Y in ground water with inductively coupled plasma mass spectrometry (ICP-MS) was established with. 2-ethylhexyl hydrogen 2-ethylhexylphosphonate (P-507) resin as the stationary phase and HCl/EDTA as a mobile phased The separation-of REs, Sc, and Y from the matrix elements; experimental conditions for elution with small amount of EDTA and optimum parameters of ICP-MS were discussed. When the column is set at pH 2.6, most of the matrix,elements such as Ca and Mg were separated from M - without: elution. A complete separation was accomplished with elution of 5 mL 100 mmole EDTA. The detection limit for this determination is 0.7 similar to 10.1 ng/L. The recovery of standard addition is 95% similar to 99%. Satisfactory result was obtained for RES in both practical and simulated ground water.