Determination of iron, magnesium, manganese, lead and aluminum in antimony-beryllium pellets by standard addition-inductively coupled plasma atomic emission spectrometry
WANG Zhi-ping, YIN Yi-dan
State Key Laboratory of Rare Metal Special Materials, Northwest Rare Metal Materials Research Institute Ningxia Co., Ltd., Shizuishan 75300, China
Abstract：In antimony-beryllium pellet, the mass fraction of antimony is about 80% and that of beryllium is about 20%. The presence of beryllium will affect the determination of iron, magnesium, manganese, lead and aluminum by inductively coupled plasma atomic emission spectrometry (ICP-AES). Moreover, the hydrolysis of antimony will also affect the determination. The samples were treated with hydrochloric acid, nitric acid and tartaric acid. Fe 240.488nm, Mg 285.213nm, Mn 259.373nm, Pb 182.205nm and Al 308.215nm were selected as the analytical lines. The preparation of calibration curves by the method of standard addition (MSA) could eliminate the influence of matrix effect caused by beryllium and antimony. Moreover, the hydrolysis of antimony could be completely inhibited using tartaric acid. The content of iron, magnesium, manganese, lead and aluminum were determined by ICP-AES. Consequently the analysis method of impurities in antimony-beryllium pellet such as iron, magnesium, manganese, lead and aluminum was established. When the contents of elements were in range of 10-400μg/g, the linear correlation coefficients of calibration curves were all higher than 0.9998. The detection limits of elements in this method were between 0.48 and 3.6μg/g. The proposed method was applied for the determination of iron, magnesium, manganese, lead and aluminum in two antimony-beryllium pellet samples. The relative standard deviations (RSD, n=11) of the results were between 1.1% and 4.9%. The contents of iron, magnesium, manganese, lead and aluminum in two antimony-beryllium pellet samples were determined according to the experimental method and other methods (atomic absorption spectrometry for iron, lead, magnesium and manganese, and spectrophotometry for aluminum), and the results were consistent.
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WANG Zhi-ping, YIN Yi-dan. Determination of iron, magnesium, manganese, lead and aluminum in antimony-beryllium pellets by standard addition-inductively coupled plasma atomic emission spectrometry. , 2019, 39(11): 79-83.
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