Abstract：Zirconium alloys and zirconium compounds are widely used in aerospace, nuclear energy, special ceramic glass and other strategic emerging industries. Zirconium sand is an important raw material for zirconium alloys and zirconium compounds, and the current determination methods of barium content cannot meet the testing demand. 0.500 0 g of sample was transferred into silver crucible containing 2.0 g of anhydrous sodium peroxide and 2.0 g of anhydrous sodium carbonate in experiments followed by fusion sample preparation at 700 ℃. The filter residue was dissolved with nitric acid and perchloric acid after water leaching and filtering. Ba 233.527 nm was selected as the analytical line to establish the determination method of barium in zircon sand by inductively coupled plasma atomic emission spectrometry (ICP-AES). The results showed that the mass concentration of barium in the range of 0.1-15.0 μg/mL was linear to the emission intensity, and the correlation coefficient was greater than 0.999 9. The limit of detection (mass fraction, similarly hereinafter) and limit of quantification were 0.000 3% and 0.001 0%, respectively. The determination of barium was not affected by the following coexisting ions in solution: 300 μg/mL Si, 50 μg/mL Al, 50 μg/mL Fe, 10 μg/mL Hf, 100 μg/mL Ca, and 200 μg/mL Zr. The content of barium in zircon sand was determined according to the experimental method. The relative standard deviation (RSD, n=7) was less than 5%, and the recoveries were between 98% and 102%. The measurement results were consistent with those obtained by inductively coupled plasma mass spectrometry.
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