窒化鋼の分光分析におけるスペクトル線強度に影響する諸条件
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概要
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In spectrochemical analysis of low steel alloys including nitralloy, when excited by oscillating, discharge (<I>V</I>=940 V, <I>C</I>=5μF, <I>R</I>=residual and <I>L</I>=360μH), matrix effect is observed as changes in line intensities and their ratios. For the purpose of eliminating the matrix effect, excitation characteristics are examined by varying the gas in the spark chamber. The gases used are mixtures of oxygen, nitrogen and argon. Introduction of oxygen has suppressing effect on vapourization of samples resulting in weakening of whole line intensities and in increasing ionic to atomic line intensity ratios. With a mixture of nitrogen and argon, ionic to atomic line intensity ratio is different for every different sample because of the difference in matrix effect. Overdamped discharge (<I>V</I>=40V, <I>C</I>=5μF, <I>R</I>=50Ω and <I>L</I>=360μH) in air or introduction of argon into the spark chamber reduces approciably the matrix effect.
- 社団法人 日本分光学会の論文