Spectral interference elimination and self-absorption reduction in laser-induced breakdown spectroscopy assisted with laser-stimulated absorption. (November 2020)

• Record Type: Journal Article
• Authors: Tang, Yun; Ma, Shixiang; Yuan, Rui; Ma, Yuyang; Sheng, Wei; Zhan, Shiping; Wang, Junnian; Guo, Lianbo
• Is Part Of: Optics and lasers in engineering. Volume 134(2020)
• Publication Date: 2020-11
• Subjects: Laser-induced breakdown spectroscopy -- Self-absorption -- Spectral interference, Laser-stimulated absorption; Lasers in engineering -- Periodicals; Optical measurements -- Periodicals; Optics -- Periodicals; Lasers en ingénierie -- Périodiques; Mesures optiques -- Périodiques; Optique -- Périodiques; 621.36605
• DOI: 10.1016/j.optlaseng.2020.106254
• Languages: English
• ISSNs: 0143-8166

Abstract

Highlights: LIBS assisted with laser-stimulated absorption (LSA-LIBS) was proposed to reduce self-absorption in the presence of spectral interference. Rational selection of the excitation line was proved to be an important factor for self-absorption reduction. The self-absorption factor of the Ni I 341.47 nm line was reduced by 85% using LSA-LIBS. Abstract: Spectral interference and self-absorption seriously affect the accuracy of quantitative analysis in laser-induced breakdown spectroscopy (LIBS). In this work, we used LIBS assisted with laser-stimulated absorption (LSA-LIBS) to solve these problems. Taking nickel (Ni) in the alloy structural steel as an example, the results show that the spectral interference of Ni lines was eliminated, the self-absorption factor of the Ni I 341.47 nm line was reduced by 85%, and the average relative error for determination of Ni element was reduced by 83% using LSA-LIBS. The results indicate that spectral interference and self-absorption can be reduced simultaneously in LSA-LIBS.