Coarse Metal Powder-Assisted pulsed CO2 Laser-induced Breakdown Spectroscopy for the Direct Determination of Heavy Metals in Soil |
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| Authors: | Ali Khumaeni Masahiko Tani Kazuyoshi Kurihara Kiichiro Kagawa Hideaki Niki |
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| Institution: | 1. Department of Physics, Faculty of Natural Science and Mathematics, Diponegoro University, Semarang, Indonesia;2. Research Center for Development of Far-Infrared Region, University of Fukui, Fukui, Japankhumaeni@fisika.undip.ac.id;4. Research Center for Development of Far-Infrared Region, University of Fukui, Fukui, Japan;5. Department of Physics, Faculty of Education, University of Fukui, Fukui, Japan;6. Fukui Science Education Academy, Fukui, Japan;7. Graduate School of Nuclear Power and Energy Safety and Engineering, University of Fukui, Fukui, Japan |
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| Abstract: | A novel method of laser-induced plasma spectroscopy utilizing a pulsed transversely excited atmospheric CO2 laser has been developed for the high-sensitivity determination of heavy metals in soil. A coarse metal powder was used to trap the soil and to assist with plasma generation. When the CO2 laser (10.6?µm, 1.5?J, 200?ns) was irradiated on the metal and soil powder, a high-temperature and long-lifetime luminous plasma was induced. Fine particles of soil were dissociated and were excited in the plasma region. The method was used for the rapid determination of Cr, Pb, and Hg in loam. The limits of detection for Cr, Pb, and Hg were approximately 0.8, 15, and 0.7?mg/kg, respectively. |
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| Keywords: | Carbon dioxide laser heavy metals laser-induced breakdown spectroscopy soil |
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