Direct determination of trace rare earth elements in high purity Y_2O_3 using fluorination assisted electrothermal vaporization inductively coupled plasma atomic emission spectrometry with slurry sampling

摘要

A new method for the determination of trace amounts of 14 rare earth elements in high purity Y_2O_3 using fluorination assisted electrothermal vaporization in-ductively coupled plasma atomic emission spectrometry with sluriy sampling was developed. A polytetrafluo-~oethylene (PTFE) emulsion was used -as a fluorinating reagent to promote the vaporization of the analytes from graphite furnace. The main factors affecting analytical-signals were investigated systematically. The interference of matrix could be minimized in the presence of PTFE. Under optimum conditions, the detection limits for rare earth elements were 0.032 ng.-2.52 ng and the relative ~tsindard deviations were in the range of 1.4% to 4.3%.The proposed method was applied to the direct analysis of High purity Y_2O_3 powder with satisfactory results.