Multielemental self-absorption reduction in laser-induced breakdown spectroscopy by using microwave-assisted excitation

Yun Tang, Jiaming Li, Zhongqi Hao, Shisong Tang, Zhihao Zhu, Lianbo Guo, Xiangyou Li, Xiaoyan Zeng, Jun Duan, Yongfeng Lu

Research output: Contribution to journalArticle

29 Scopus citations

Abstract

The self-absorption effect seriously affects the accuracy of determination in laser-induced breakdown spectroscopy (LIBS). In this work, we proposed to reduce multielemental self-absorption within a wide spectral range (200-900 nm) by using microwave-assisted excitation in LIBS (MAE-LIBS). Self-absorption reduction of sodium (Na), potassium (K), aluminum (Al), silicon (Si), and calcium (Ca) in potassium feldspar using MAE-LIBS was investigated. The mechanisms of self-absorption reduction in MAE-LIBS were also investigated. The results show that the serious self-absorption of spectral lines (Na and K) was reduced. The full widths at half maximum (FWHMs) of Na I 589.0 nm, Na I 589.6 nm, K I 766.5 nm, and K I 769.9 nm in potassium feldspar were reduced by 43%, 43%, 53%, and 47%, respectively. MAE-LIBS also has a little FWHM reduction for spectral lines with weak self-absorption. The results demonstrate that MAE-LIBS can simultaneously reduce multielemental self-absorption.

Original languageEnglish (US)
Pages (from-to)12121-12130
Number of pages10
JournalOptics Express
Volume26
Issue number9
DOIs
StatePublished - Apr 30 2018

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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