Quantitative determination of hydrogen isotopes using laser-induced breakdown spectroscopy

XING Yubo; ZOU Zhiping; YANG Ruizhu; MA Wei; ZOU Liping; LU Liang; YANG Zhen

doi:10.11889/j.0253-3219.2023.hjs.46.020202

He jishu (Feb 2023)

Quantitative determination of hydrogen isotopes using laser-induced breakdown spectroscopy

XING Yubo,
ZOU Zhiping,
YANG Ruizhu,
MA Wei,
ZOU Liping,
LU Liang,
YANG Zhen

Affiliations

XING Yubo: Institute of Sino-franco Nuclear Energy, Sun Yat-sen University, Zhuhai 519082, China
ZOU Zhiping: Institute of Sino-franco Nuclear Energy, Sun Yat-sen University, Zhuhai 519082, China
YANG Ruizhu: The Science and Technology on Surface Physics and Chemistry Laboratory, Mianyang 621908, China
MA Wei: Institute of Sino-franco Nuclear Energy, Sun Yat-sen University, Zhuhai 519082, China
ZOU Liping: Institute of Sino-franco Nuclear Energy, Sun Yat-sen University, Zhuhai 519082, China
LU Liang: Institute of Sino-franco Nuclear Energy, Sun Yat-sen University, Zhuhai 519082, China
YANG Zhen: Institute of Sino-franco Nuclear Energy, Sun Yat-sen University, Zhuhai 519082, China

DOI: https://doi.org/10.11889/j.0253-3219.2023.hjs.46.020202
Journal volume & issue: Vol. 46, no. 2
pp. 020202 – 020202

Abstract

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BackgroundLaser-induced breakdown spectroscopy (LIBS) is a new technology for testing and analyzing the composition and content of elements in materials.PurposeThis study aim to determine the content and distribution of hydrogen isotopes in hydrogen storage materials by using LIBS quantitative analysis technology.MethodsThrough independent design, construction and integration, a LIBS system was established for in-situ measurement of hydrogen isotopes in a vacuum chamber. Titanium sheets were used to prepare titanium-hydrogen samples with different concentrations of hydrogen and deuterium atoms to investigate the content and distribution of hydrogen isotopes in titanium using LIBS technology. The plasma parameters were calculated from the emission spectrum of titanium, and quantitative analysis on the content of hydrogen and deuterium atoms in the titanium sheet was carried out. Finally, the internal calibration method was employed to draw the calibration curves of hydrogen and deuterium, respectively, so as to determine the accuracy of this technology.ResultsThe plasma temperature calculated from the Boltzmann diagram is (16 000±1 000) K. Test results show that the linearity of calibration curves is increased by 4% by integrated intensity calibration, and the error of hydrogen isotope quantitative analysis is reduced by 2.8%. Based on the fitted curve, the concentration is consistent with the concentration determined by the pressure drop method during the sample preparation process. The average measurement error of hydrogen and deuterium is 3.19% and 1.94% respectively.ConclusionsProvided that the plasma state conforms to the local thermal equilibrium and the plasma temperature of different elements is consistent, LIBS quantitative analysis can accurately measure the contents of hydrogen isotopes by using the internal standard method. Signal enhancement effect and data accuracy of LIBS meet the requirements of quantitative analysis.

Published in He jishu

ISSN: 0253-3219 (Print)
Publisher: Science Press
Country of publisher: China
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Nuclear engineering. Atomic power
Website: https://www.hjs.sinap.ac.cn/

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