精錬過程における微量炭素の発光分光分析による迅速定量法(機器分析)(<特集>分析評価・解析)

概要

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A rapid determination method of small amounts of carbon on steel making process by emission spectrometric analysis was studied. In this study, the influence of sample surface and measurment conditions on an analytical value were made clear. The followings results were obtained. (1) ZrO_2 abrasive paper was better than Al_2O_3 one for the surface preparation of sample concerning analytical precision, while the grit size of polisher had no influence on analytical results. (2) A sample surface of small amount carbon had a thin and smooth layer by electrical spark remelting compared with an high carbon steel sample, therefore it results in necessity of less time for pre-spark-burn. (3) Regarding the carbon spectral line for analysis, C(I) 165.8 nm was appropriate for the range below 0.01% content and C(I) 193.1 nm was better for the range over 0.01%. (4) Interference for the carbon spectral by coexisting elements were not observed, however the presence of Al_2O_3 inclusion had influence on the carbon intensity. The interference might not be reduced without the classification technique of calibration curves.
社団法人日本鉄鋼協会の論文
1991-11-01