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Evaluation of the self-absorption reduction of minor elements in laser-induced breakdown spectroscopy assisted with laser-stimulated absorption

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Abstract

Reducing self-absorption is one of the most important steps in achieving accurate analyses in laser-induced breakdown spectroscopy (LIBS). In this work, LIBS assisted with laser-stimulated absorption (LSA-LIBS) was used to reduce self-absorption effects in LIBS. A wavelength-tunable laser was used to resonantly excite cold atoms and reduce their amount in laser-induced plasmas, and thus fewer cold atoms at the plasma periphery re-absorb light from the plasma center. Accordingly, the self-absorption effect was reduced. Copper (Cu) and chromium (Cr) elements in steels were taken as examples to evaluate and compare the self-absorption effects in LIBS and LSA-LIBS. The results of calculated self-absorption coefficients (SAs) supported the effectiveness in reducing self-absorption and improving analytical linearity using LSA-LIBS.

Graphical abstract: Evaluation of the self-absorption reduction of minor elements in laser-induced breakdown spectroscopy assisted with laser-stimulated absorption

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Publication details

The article was received on 31 May 2017, accepted on 21 Aug 2017 and first published on 21 Aug 2017


Article type: Paper
DOI: 10.1039/C7JA00199A
Citation: J. Anal. At. Spectrom., 2017, Advance Article
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    Evaluation of the self-absorption reduction of minor elements in laser-induced breakdown spectroscopy assisted with laser-stimulated absorption

    J. Li, Y. Tang, Z. Hao, N. Zhao, X. Yang, H. Yu, L. Guo, X. Li, X. Zeng and Y. Lu, J. Anal. At. Spectrom., 2017, Advance Article , DOI: 10.1039/C7JA00199A

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