In situ analysis of Na and K in a laminar premixed flame by laser-induced breakdown spectroscopy

Abstract

Laser-induced breakdown spectroscopy(LIBS) was used to in situ monitor the concentration of alkali elements in combustion environments. Particular efforts were made to optimize the temporally resolved spectra of Na and K elements. Calibration curves were constructed by relating the intensities of the specific lines to the corresponding elemental concentrations. The detection limits of Na and K elements were found to be temperature-dependent. The results indicate that LIBS can be a powerful tool for in situ monitoring Na and K concentrations in combustion environments.

Keywords

Laser-induced breakdown spectroscopy(LIBS) / Alkali metal / Solution-seeded / Calibration curve

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