Abstract
Inductively coupled plasma atomic emission spectrometry in combination with extraction chromatography was applied to the determination of trace amounts of zirconium and hafnium in high-purity scandium oxide. The chromatographic column separation procedure was carried out with 1-phenyl-3-methyl-4-benzoylpyrazol-5-one as the stationary phase and hydrochloride acid as the mobile phase. Optimum column operating conditions were established. The enrichment factor based on 0.1 g of scandium oxide was over 2000. The results obtained agreed well with those obtained by spark-source mass spectrometry without the separation of scandium. For a sample mass of 0.3 g, the detection limits for zirconium and hafnium were 0.14 and 0.17 μg g −1, respectively. The proposed method could be applied to the analysis of scandium oxide of laser grade and 99.9995% purity.
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