減圧レーザ誘起プラズマ発光分析法を用いたFe基合金中Niの定量分析

摘要

鉄鋼材料の特性は材料を構成する元素の種類と含有率に大きく影響を受けるため，元素量を精確に定量することは材料を評価する上で非常に重要である。鉄鋼材料の元素の定量分析において，微量城かつ高精度な定量ができる湿式化学分析法として，吸光光度法，誘導結合プラズマ発光分析法（ICP-OES），原子吸光法（AAS）などが知られている。%In order to evaluate the analytical precision in low pressure laser-induced argon plasma emission spectrometry (LIPS), we conducted the determination of Ni in Fe-based alloys to consider the most suitable measurement condition, in particular, a gas pressure of argon and several measuring parameters for time-resolved observation. The selection of emission lines was an important factor to obtain a liner calibration curve depending on the concentration of Ni. The precision was generally inferior to analytical results in XRF and ICP-OES. However, the analytical value of Ni was obtained with good reliability, by averaging during replicate measurements. It was further shown the Ni content in Fe-Ni-X alloys would be determined by using calibration curves estimated from binary Fe-Ni alloys.