Stabilization of the spark-discharge point on a sample surface by laser irradiation for steel analysis. |
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| Authors: | Hideyuki Matsuta Kuniyuki Kitagawa Kazuaki Wagatsuma |
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| Institution: | Institute for Materials Research, Tohoku University, Sendai, Japan. matsuta@imr.tohoku.ac.jp |
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| Abstract: | A combined technique with laser irradiation is suggested to control spark discharge for analytical use, having a unique feature that firing points of the spark discharge can be fixed by laser irradiation. Because the spark discharge easily initiates at particular surface sites, such as non-metallic inclusions, called selective discharge, the concentration of some elements sometimes deviates from their average one in spark discharge optical emission spectrometry. Therefore, stabilization of firing points on a sample surface could improve the analytical precision. |
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