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Microwave-assisted laser induced breakdown molecular spectroscopy: quantitative chlorine detection

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Abstract

Quantitative detection of chlorine, through molecular emission from CaCl, using microwave assisted laser induced breakdown spectroscopy (MW-LIBS) has been demonstrated. CaCl emission is utilised in the spectral range of 617.9–621.5 nm. Using time-resolved emission spectra of CaCl at 617.9 nm, following a 1.5 ms microwave pulse, an optimum gate-width and gate-delay have been established. A linear relationship between the intensity of CaCl molecular emission and chlorine concentration on a cement surface has been validated. This yields a limit of detection (LoD) of 47 ± 7 μg g−1 and ∼170 ± 59 μg g−1 for chlorine, based on 100 shots averaged and a single shot, respectively. The results represent a 10-fold improvement in the chlorine LoD on cement.

Graphical abstract: Microwave-assisted laser induced breakdown molecular spectroscopy: quantitative chlorine detection

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Publication details

The article was received on 26 Apr 2019, accepted on 09 Jul 2019 and first published on 10 Jul 2019


Article type: Paper
DOI: 10.1039/C9JA00151D
J. Anal. At. Spectrom., 2019, Advance Article

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    Microwave-assisted laser induced breakdown molecular spectroscopy: quantitative chlorine detection

    M. A. Wakil and Z. T. Alwahabi, J. Anal. At. Spectrom., 2019, Advance Article , DOI: 10.1039/C9JA00151D

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