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

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 617.9621.5 nm. Using time-resolved emission spectra of CaCl at 617.9 nm, followi...

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Bibliographic Details
Published in:Journal of analytical atomic spectrometry 2019-09, Vol.34 (9), p.1892-1899
Main Authors: Wakil, M. A, Alwahabi, Zeyad T
Format: Article
Language:English
Subjects:
Chlorine
Emission spectra
Laser induced breakdown spectroscopy
Molecular spectroscopy
Spectrum analysis
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Summary: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 617.9621.5 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 g g 1 and 170 59 g 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. A 47 7 g. g 1 detection limit of chlorine in cement has been recorded, using microwave-assisted laser induced breakdown spectroscopy.
ISSN:0267-9477
1364-5544
DOI:10.1039/c9ja00151d