Hydrogen analysis in metal samples by selective detection method utilizing TEA CO2 laser-induced He gas plasma |
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| Authors: | Zener Sukra Lie Ali Khumaeni Tadashi Maruyama Ken-ichi Fukumoto Hideaki Niki Kiichiro Kagawa |
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| Institution: | (1) Research Center of Maju Makmur Mandiri Foundation, 40 Srengseng Raya, Kembangan, Jakarta Barat, 11630, Indonesia;(2) Department of Mechanical Engineering, Faculty of Engineering, Diponegoro University, Tembalang Campus, Semarang, 50275, Indonesia;(3) Physics Department, Research Institute of Physics and Chemistry, Chonbuk National University, Chonju, 561-756, South Korea;(4) Faculty of Education and Regional Studies, Fukui University, 9-1 bunkyo 3-chome, Fukui 910-8507, Japan;(5) Physics of Magnetism and Photonics Group, Faculty of Mathematics and Natural Sciences, Bandung Institute of Technology, 10 Ganesha, Bandung, 40132, Indonesia; |
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| Abstract: | When a Transversely Excited Atmospheric (TEA) CO2 laser (energy of 1.5 J, pulse duration of 200 ns) was focused on a metal sample surface containing hydrogen (H) in He gas
at 1 atm, a strong helium gas plasma was produced and only H atoms came out of the sample. The H atoms then moved into the
helium gas plasma to be excited through meta-stable helium atoms. Using this technique, an excellent linear calibration curve
with zero intercept was made using zircalloy-2 samples containing H (100–600 ppm), where the compensation method was made
using an emission intensity of O I 777.1 nm in order to subtract the H emission intensity coming from unwanted H2O. It should be emphasized that this technique has a possibility to realize highly sensitive analysis of H with a detection
limit of less than 1 ppm because of its selective detection. |
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