Open AccessInvestigation on self-absorption at reduced air pressure in quantitative analysis using laser-induced breakdown spectroscopy
Author(s) -
Zhongqi Hao,
L. Liu,
Mohan Shen,
Xin Yang,
K. H. Li,
Lian Bo Guo,
X. Y. Li,
Yong Feng Lu,
Xianlin Zeng
Publication year - 2016
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.24.026521
Subject(s) - laser induced breakdown spectroscopy , materials science , absorption (acoustics) , attenuation coefficient , absorption spectroscopy , calibration , calibration curve , spectroscopy , analytical chemistry (journal) , optics , atmospheric pressure , laser , chemistry , meteorology , composite material , physics , chromatography , quantum mechanics , detection limit
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 (R 2 ) 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.