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Spectral Sodium Chloride (NaCl) Identification By LIBS Technique In Bulk And Jet Solution: Some Parametric Aspects

An experimental set‐up using laser‐induced breakdown spectroscopy L.I.B.S technique for analysis metallic sodium in aqueous solution of sodium chloride (NaCl) is described. In our experimental investigation the LIBS technique was used to study the spectral emission doublet lines of the sodium in two configurations: bulk excitation (∼15 mm depth), and jet excitation. Sparks were generated in water bulk and water jet by a Q‐switch Nd: YAG laser beam, focussed directly in liquids. Emissions from NaI neutral atoms were observed. The investigation was based on line intensity versus laser pulse energy, line half width versus concentration and noise ratio versus laser pulse energy. The obtained results show that both configurations—bulk and jet excitation‐required some precautions and could be used with respect optimal conditions.