Tamboli, MM and Unnikrishnan, VK and Devangad, Praveen and Muhammed, Shameem KM and Santhosh, C (2017) ST-LIBS for heavy element detection in complex matrices. Proceedings of SPIE-The International Society for Optical Engineering, 10449. ISSN 1996-756X

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Abstract

Interest in the use of laser-based sensors operating in stand-off mode is increasing due to the wide range of options offered in the evaluation of distant targets. In this work, a stand-off laser induced breakdown spectroscopy (ST-LIBS)system has been developed and demonstrated to determine the heavy elements in soil samples. Initially, different parameters of the device have been optimized in ambient atmosphere and tested for quantitative analysis of Nickel and Chromium at two different stand-off distances (1 m and 6 m). The prepared concentrations were in the range of 100 ppm to 600 ppm. The laser energy of 150 mJ was maintained through out the experiment and to obtain a real time situation the target was in static state.

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