Abstract：In quantitative analysis of gases content in magnesium by inert gas fusion method, accurate determination could be realized by eliminating the interference of magnesium volatile matters through separate determination of oxygen, hydrogen, and nitrogen with combination of proper bath material and flux. In this paper, the content of oxygen in pure magnesium powder, magnesium-aluminum powder, magnesium granule and magnesium ingot samples were determined using special Sn-Ni-Fe-Cu-C quinary bath with relative standard deviation (RSD, n=3) smaller than 31.5 %. The recovery of oxygen was up to 97.1 % with pure Mg(OH)2 for calibration. The content of hydrogen in magnesium powder, magnesium-aluminum powder and magnesium ingot samples were determined using tin fluxing agent/bath material combining with low analytical power, and the RSD (n=6) was smaller than 35.7 %. The recovery of hydrogen was up to 96.9 % with Mg(OH)2 for calibration. The content of nitrogen in pure magnesium powder, magnesium-aluminum powder and magnesium ingot samples were determined using nickel fluxing agent, and the RSD (n=3) was smaller than 23.6 %. The recovery of hydrogen was up to 99.2 % with pure Mg3N2 for calibration. The magnesium pollution was monitored with steel certified reference materials to ensure the reliability of analytical results of gases in magnesium.
朱跃进，李素娟. 惰气熔融法测定镁中氧、氢、氮[J]. 冶金分析, 2011, 31(12): 58-61.
ZHU Yue-jin, LI Su-juan. Determination of oxygen, hydrogen and nitrogen in magnesium by inert gas fusion method. , 2011, 31(12): 58-61.
