Investigation on self-absorption at reduced air pressure in quantitative analysis using laserinduced breakdown spectroscopy

Z. Q. Hao, L. Liu, M. Shen, X. Y. Yang, K. H. Li, L. B. Guo, X. Y. Li, Y. F. Lu, X. Y. Zeng

Research output: Contribution to journalArticle

23 Scopus citations

Abstract

The self-absorption at reduced air pressure for quantitative analysis of Mn and Cu elements in steel using laser-induced breakdown spectroscopy was investigated. The calibration curves of Mn and Cu elements at the air pressures of 100, 80, 50, 20, and 1 kPa were studied. The results show that, the nonlinearity of calibration curves which caused by self-absorption effects at atmosphere could be significantly improved by reducing the air pressure to 1 kPa, and the coefficients of determination (R2) of linear calibration curves of Mn and Cu lines are all higher than 0.99. The further study explored that the reason for the improvement was that the induced plasma became low density and the self-absorption coefficient was close to 1 when the air pressure reduced to 1 kPa.

Original languageEnglish (US)
Pages (from-to)26521-26528
Number of pages8
JournalOptics Express
Volume24
Issue number23
DOIs
StatePublished - Nov 14 2016

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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