不活性ガス吹込み微粒子生成-誘導結合プラズマ発光分光分析法による溶鋼直接分析法の開発(オンライン分析)(<特集>分析評価・解析)

概要

論文の詳細を見る
Direct determination of elements in molten steel without sampling has been developed with ultra fine particles (UFP) generation-inductively coupled plasma (ICP) atomic emission spectrometry. At first, (1) analytical conditions for UFP generation with spark discharge method and (2) the effect of plasma observation height and UFP contents on analytical precision were investigated with block steel samples. It was found that, (1) stability of carrier gas was the most important for analytical precision, and (2) suitable plasma obsevation height for the determination of C, P and S was 10 mm. Secondary, analytical conditions for UFP generation with Ar gas injection method were investigated with molten steel samples (Ar gas flow rate ; 15∿25 Nl/min, nozzle immersed depth ; 10 mm). The analytical results of Mn, Cu, Ni, Cr, Nb, V, P, S in molten steel agreed with those obtained by the conventional method after sampling. It is important to keep at constant pressure in the probe for the generation of UFP. The time required for analysis of one cycle is approximately 90 s. The present method is more suitable for direct determination of elements in molten steel.
社団法人日本鉄鋼協会の論文
1991-11-01