Determination of seventeen impurity elements in high purity selenium by inductively coupled plasma mass spectrometry after extraction separation with 4-methyl-2-ketone
LIU Hong, XU Jin-yong*, WANG Yun-guang, FENG Fang-bingZHANG Kun-peng, TANG Yuan-bin
Chengdu University of Technology,Chengdu 610059,China
Abstract：During the determination of trace impurity elements in high-purity selenium (5 N-6 N) by inductively coupled plasma mass spectrometry (ICP-MS), the matrix effect of selenium was obvious and influenced the accuracy of determination results. The high purity selenium was dissolved with nitric acid. After selective extraction of selenium with 4-methyl-2-ketone (MIBK), the water phase was determined. Thus, a determination method of 17 impurity elements (including Li, Be, B, Sc, Ti, V, Cr, Mn, Co, Ni, Cu, Zn, As, Sr, Cd, Ba and Pb) in high-purity selenium by ICP-MS was established. The experiments showed that the mass concentration of selenium in water phase was less than 5mg/L under the following conditions: the concentration of hydrochloric acid was 7mol/L, the volume of MIBK was 20mL and the extraction time was 2min. As a result, the influence of selenium matrix on the determination could be ignored. The linear correlation coefficients of calibration curves of elements in this method were all higher than 0.9995. The detection limits of method of elements were between 0.2ng/g and 7.0ng/g. Seventeen impurities in high purity selenium sample were determined according to the experimental method. The relative standard deviations (RSD, n=6) of determination results were between 5.0% and 11.2%. The recoveries of standard addition were between 91% and 103%.
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LIU Hong, XU Jin-yong, WANG Yun-guang, FENG Fang-bingZHANG Kun-peng, TANG Yuan-bin. Determination of seventeen impurity elements in high purity selenium by inductively coupled plasma mass spectrometry after extraction separation with 4-methyl-2-ketone. , 2017, 37(12): 22-26.
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