発光分光分析における雰囲気および圧力効果に関する研究 : スペクトル線強度と電極消耗量との関係

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In the atmosphere of argon, oxygen, or their mixture, relations between the line intensity of manganese in low alloy steel and the sample erosion have been studied by means of a HVS discharge with carbon or silver counter-electrode. The sample erosion was estimated from the quantity of iron deposited on the counter-electrode, because the amount of iron on the counter-electrode has been confirmed to show the linear correlations with the sample erosion in various argon-oxygen atmospheres. In the case of the discharge in argon atmosphere, Mn II 293.3 nm line-intensity showed large value in spite of a little sample erosion with both carbon and silver counter-electrodes. For the discharge in argon-oxygen mixed atmospheres, it was observed that the sample erosion increased with steping up the oxygen content with both counter-electrodes, but the behavior of Mn II spectral-line varied with either carbon or silver counter-electrode. Mn II line-intensity by using the carbon counter-electrode increased with steping up the oxygen content, whereas the intensity by the silver counter-electrode showed the ill-defined minimum at about 50% oxygen content. For the discharge in oxygen atmosphere, the Mn II line-intensity showed the maximum at about 1.5 kg/cm2 oxygen pressure for both counter-electrodes, though the sample erosion increased simply with steping up the oxygen pressure. On the basis of the results stated above, the mechanism of the evaporation process of manganese was also discussed.
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発光分光分析における雰囲気および圧力効果に関する研究 : スペクトル線強度と電極消耗量との関係

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