caa a22 4500 445372508 CHVBK 20180317142952.0 cr unu---uuuuu 170323e20110301xx s 000 0 eng 10.1007/s00340-010-4202-8 doi (NATIONALLICENCE)springer-10.1007/s00340-010-4202-8 Non-intrusive, on-line, simultaneous multi-species impurity monitoring in hydrogen using LIBS [Elektronische Daten] [K. Eseller, F.-Y. Yueh, J. Singh] Laser-induced breakdown spectroscopy (LIBS) has been evaluated for on-line, simultaneous multi-species impurity monitoring in hydrogen. A miniature spectrometer with spectral coverage of 620-800nm and a gated detection system with spectral coverage of 40nm were both used to record LIBS spectra from the spark produced in sample gas by a frequency-doubled Nd YAG laser. The effect of pressure on detecting the impurity (e.g., nitrogen, argon, and oxygen) in hydrogen was studied. LIBS spectra with different impurity levels of nitrogen, argon, and oxygen were recorded, and the intensity of the spectral lines of Ar, O, N, and H observed were used to form calibration plots for impurity measurement. The limits of detection (LODs) for oxygen, argon, and nitrogen in hydrogen were estimated from the calibration obtained with both the gated and ungated detection. The hydrogen impurity measurements based on the ungated miniature system show reliable and reproductive results. But the LODs with this system are about four times higher than the LODs obtained with a gated detection system in this work. Springer-Verlag, 2010 Eseller K. Institute for Clean Energy Technology, Mississippi State University, 205 Research Boulevard, 39759, Starkville, MS, USA aut Yueh F.-Y Institute for Clean Energy Technology, Mississippi State University, 205 Research Boulevard, 39759, Starkville, MS, USA aut Singh J. Institute for Clean Energy Technology, Mississippi State University, 205 Research Boulevard, 39759, Starkville, MS, USA aut Applied Physics B Springer-Verlag 102/4(2011-03-01), 963-969 0946-2171 102:4<963 2011 102 340 https://doi.org/10.1007/s00340-010-4202-8 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00340-010-4202-8 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Eseller K. Institute for Clean Energy Technology, Mississippi State University, 205 Research Boulevard, 39759, Starkville, MS, USA aut NATIONALLICENCE 700 1- Yueh F.-Y Institute for Clean Energy Technology, Mississippi State University, 205 Research Boulevard, 39759, Starkville, MS, USA aut NATIONALLICENCE 700 1- Singh J. Institute for Clean Energy Technology, Mississippi State University, 205 Research Boulevard, 39759, Starkville, MS, USA aut NATIONALLICENCE 773 0- Applied Physics B Springer-Verlag 102/4(2011-03-01), 963-969 0946-2171 102:4<963 2011 102 340 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer