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Issue 12, 2018
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Femtosecond laser-ablation spark-induced breakdown spectroscopy and its application to the elemental analysis of aluminum alloys

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Abstract

In this work, a spark discharge was used to re-excite the plasma induced by a femtosecond laser operated at 1 kHz repetition rate. It was experimentally demonstrated that the spark discharge both prolonged the time durations and enhanced the peak intensities of the atomic emissions of the laser-induced plasma, and thus the time integrated signal intensities could be enhanced significantly. Chromium, manganese, magnesium and copper in aluminum alloys were analyzed with femtosecond laser-ablation spark-induced breakdown spectroscopy (fs-LA-SIBS), and the limits of detection of these elements were determined to be 7.8, 20.1, 11.1 and 9.0 ppm, respectively under the current experimental conditions. 4–10 fold improvements have been achieved compared with the LODs of 49.5, 81.9, 91.6, 88.6 ppm obtained by femtosecond laser-induced breakdown spectroscopy (fs-LIBS) with the same laser pulse energy. Good analytical reproducibility with 3–4% relative standard deviation for multiple measurements has also been demonstrated. This fs-LA-SIBS technique is able to retain the advantages of fs-LIBS on laser-ablation and quantitative analysis but with better analytical sensitivity. High repetition rate operation of this technique is very helpful to increase its analytical speed.

Graphical abstract: Femtosecond laser-ablation spark-induced breakdown spectroscopy and its application to the elemental analysis of aluminum alloys

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Publication details

The article was received on 04 Aug 2018, accepted on 05 Oct 2018 and first published on 05 Oct 2018


Article type: Technical Note
DOI: 10.1039/C8JA00261D
Citation: J. Anal. At. Spectrom., 2018,33, 2203-2209
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    Femtosecond laser-ablation spark-induced breakdown spectroscopy and its application to the elemental analysis of aluminum alloys

    X. He, B. Chen, Y. Chen, R. Li and F. Wang, J. Anal. At. Spectrom., 2018, 33, 2203
    DOI: 10.1039/C8JA00261D

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