• Bulletin of the Korean Chemical Society
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• v.29 no.10
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• pp.2069-2071
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• 2008

• Bulletin of the Korean Chemical Society
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• v.35 no.7
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• pp.2205-2206
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• 2014

• Bulletin of the Korean Chemical Society
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• v.26 no.5
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• pp.805-807
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• 2005

• Transactions of the KSME C: Technology and Education
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• v.3 no.4
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• pp.291-297
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• 2015

As promising future energy source, hydrogen has been drawing much attention; however, it is easily leaked from the small gap in any storage container due to its find molecule size. In this study, Laser induced breakdown spectroscopy(LIBS) was used for hydrogen leak detection, and feasibility of the scheme was evaluated based on different way for plasma generation. Laser power of 295 mW was required for generating plasma on metal surface to measure hydrogen atomic emission while approximately 2.5 times higher laser power was needed for plasma formation directly in the hydrogen gas stream. It was shown that peak to base ratio increased linearly with increasing the concentration of hydrogen. It can be concluded that LIBS is a viable technique for hydrogen sensing when the concentration of hydrogen is less than 5%.