Determination of rare earth impurities in high purity ytterbium oxide using inductively coupled plasma mass spectrometry

【摘要】：正A novel methodology was developed for the determination of trace quantities of rare earth elements (REEs) in high purity ytterbium oxide by inductively coupled plasma mass spectrometry (1CP-MS) in this work.The mass spectra overlap interferences arose from Yb matrix on the neighbouring analytes of ~(169)Tm(100) and ~(175)Lu(97.4) were eliminated through adjusting instrumental peak resolution value from 0.7amu to 0.3amu.The matrix suppression effect of Yb on the ion peak signals of REEs impurities was compensated effectively with spiking In as internal standard clement.The limits of quantitation (LOQ) of REEs impurities were from 0.0093μgg~(-1) to 0.022μgg~(-1),the recoveries for REEs spiked sample were found to be in the range of 91.2%～105% through using the proposed method and relative standard deviation (RSD) varied between 3.1% and 7.2%.The novel methodology had been found to be suitable for the determination of trace REEs impurities in 99.999%～99.9999% high purity Yb_2O_3 and the results obtained from this method keep in good agreement with that acquired from high resolution ICP-MS.