燃焼-赤外線吸収法による鉱石及びフェロアロイ中の硫黄の定量

概要

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The study of the combustion-infrared absorptiometric determination of sulfur in ores and ferroalloys has been performed. The analytical values of standard ores obtained by using accelerators (combination of tungsten and iron) and sample preheating (preheating temperature : 630℃, preheating time : 15min) to eliminate interference due to combined water agreed with the certified values. The coefficients of variation were (1.2〜5.8) % except for Mn ore containing very low amounts of sulfur (analytical value :0.0027%). The combination of accelerators and their optimum amounts were examined for the analysis of ferroalloys. In the case of combination of tungsten and iron, much combustion dust deposited on the dust filter which adsorbed some amount of sulfur dioxide. The tungsten alone gave better results in view of an efficient routine analysis. The analytical values obtained by using tungsten alone (ca. 2.0g for 0.5g samples) as an accelerator agreed with those obtained by the other methods (isotope dilution-spark source mass spectrometry and comustion-alkalimetric method).
社団法人日本分析化学会の論文
1982-03-05