ガラスビード法による鉄鉱石のけい光 X 線分析における鉄分定量におよぼす結合水の影響および SiO_2, CaO の定量

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There has been problems on fluorescent X-ray analysis of iron ores by glass bead technique. Of these, the influence of combined water on the analysis of total iron content and the influence of coexistent elements on the analysis of SiO_2 and CaO contents have been theoretically studied. In the glass bead procedure in which sodium tetraborate is used as fusing flux, calculation is made on the intensity of FeKα, SiKα and CaKα. The results are as follows : (1) In the glass bead which is prepared without calcination of iron ore sample with combined water, FeKα intensity increases as combined water is lost out of the system by fusing and heating. For example, Goethite (Fe_2O_3・H_2O) which has 10.1% combined water is analysed more by about 0.5% T. Fe in the calibration curve of Fe-O binary system sample. (2) In the analysis of SiO_2 and CaO, the intensities of SiKα and CaKα do not change largely when coexistent iron oxide is substituted with other impurities, that is, the influence of coexistent element is little. (3) Analytical experiments for JSS standard sample show that the theoretical results of (1) and (2) described adove agree well with experimental ones.
社団法人日本鉄鋼協会の論文
1980-12-01