Investigation of the self-absorption effect using time-resolved laser-induced breakdown spectroscopy

Yun Tang, Shixiang Ma, Yanwu Chu, Tao Wu, Yuyang Ma, Zhenlin Hu, Lianbo Guo, Xiaoyan Zeng, Jun Duan, Yongfeng Lu

Research output: Contribution to journalArticle

8 Scopus citations

Abstract

Self-absorption seriously affects the accuracy and stability of quantitative analysis in laser-induced breakdown spectroscopy (LIBS). To reduce the effect of self-absorption, we investigated the temporal evolution of the self-absorption effect by establishing exponential calibration curves. Meanwhile, the temporal evolution mechanism of the self-absorption effect was also investigated. The results indicated that self-absorption was weak at the early stage of plasma expansion. For determination of manganese (Mn) in steel, as an example, the concentration of upper bound of linearity (C int ) was 2.000 wt. % at the early stage of plasma expansion (in a time window of 0.2-0.4 μs)-much higher than 0.363 wt. % at a traditional optimization time window (2-3 μs). The accuracy and stability of quantitative analysis at the time window of 0.2-0.4 μs was also much better than at the time window of 2-3 μs. This work provides a simple method for improving quantitative analysis performance and avoiding the self-absorption effect in LIBS.

Original languageEnglish (US)
Pages (from-to)4261-4270
Number of pages10
JournalOptics Express
Volume27
Issue number4
DOIs
StatePublished - 2019

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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    Tang, Y., Ma, S., Chu, Y., Wu, T., Ma, Y., Hu, Z., Guo, L., Zeng, X., Duan, J., & Lu, Y. (2019). Investigation of the self-absorption effect using time-resolved laser-induced breakdown spectroscopy. Optics Express, 27(4), 4261-4270. https://doi.org/10.1364/OE.27.004261