Determination of uranium, zirconium, hafnium, iron, manganese and titanium in zirconium-rich ore by inductively coupled plasma atomic emission spectrometry after alkali fusion and centrifuge separation
YANG Zhen, HE Panhong, MA Lin, LIANG Yali, DU Juan, A Lili
Henan Nuclear Technology Application Center, Zhengzhou 450044,China
Abstract：The content of zirconium, titanium and hafnium with high field strength is high in zirconium-rich ores. Moreover, it is easily hydrolyzed, so the sample cannot be completely decomposed using the traditional acid dissolution pretreatment, which brings great difficulties to quantitative analysis. The corundum crucible was selected to melt the sample at 700 ℃ for 14 min with sodium peroxide as the flux. The sample solution was prepared by hot water extraction and centrifugal separation. Rhenium was used as the internal standard element to improve the matrix effect of high content zirconium, sodium, iron and silicon. The contents of uranium, zirconium, hafnium, iron, manganese and titanium in zirconium-rich ores were determined by inductively coupled plasma atomic emission spectrometry (ICP-AES). In the linear range of calibration curves for elements, the linear correlation coefficients were 0.999 3-0.999 9. The limits of detection of method were between 0.35 and 18.4 μg/g. The measured values of zircon reference materials were basically consistent with the certified values. The contents of uranium, zirconium, hafnium, iron, manganese and titanium in zircon reference materials were determined according to the experimental method. The relative standard deviations (RSD, n=6) of determination results were between 0.13% and 3.7%. The spiked recoveries of actual sample were between 94.1% and 103.6%.
杨珍, 贺攀红, 马琳, 梁亚丽, 杜娟, 阿丽莉. 碱熔离心分离-电感耦合等离子体原子发射光谱法测定富锆矿石中铀锆铪铁锰钛[J]. 冶金分析, 2023, 43(5): 79-85.
YANG Zhen, HE Panhong, MA Lin, LIANG Yali, DU Juan, A Lili. Determination of uranium, zirconium, hafnium, iron, manganese and titanium in zirconium-rich ore by inductively coupled plasma atomic emission spectrometry after alkali fusion and centrifuge separation. , 2023, 43(5): 79-85.
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