Determination of zirconium, titanium, iron, thorium and hafnium in zirconium-titanium placer by inductively coupled plasma atomic emission spectrometry
LI Hong-guang, WANG Xue, WANG Zhe, YAO Shu-ping
No.240 Research Institute, Nuclear Industry, Shenyang 110032, China
Abstract：In order to meet the needs of survey and research of regional resources, an inductively coupled plasma atomic emission spectrometry (ICP-AES) after sodium peroxide fusion was proposed for simultaneous determination of five elements, namely, zirconium, titanium, iron, thorium and hafnium in zirconium-titanium placer . The sample was fused with sodium peroxide, the melt was leached with water, and the precipitate after filtration was dissolved in nitric acid and determined by ICP-AES. Because a larger amounts of sodium and most interfering elements remained in the filtrate while the determined elements entered into the precipitate after the melt produced by sodium peroxide and sample was extracted with water and filtered, thus the effect of high salt on the determination was effectively eliminated. The detection limits were 0.010 mg/L for zirconium, 0.011 mg/L for titanium, 0.005 1 mg/L for iron, 0.082 mg/L for thorium and 0.018 mg/L for hafnium. The relative standard deviations (n=5) for determination results of elements in sample were less than 5%, and the measured value of each element in the zirconium-titanium placer certified reference materials was consistent with its certified value.
