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SPECTROSCOPY

Application of laser-induced breakdown spectroscopy to in situ analysis of liquid samples

[+] Author Affiliations
Ota Samek

Institute of Physical Engineering, Technical University of Brno, Technicka´ 2, 616?69?Brno, Czech Republic

Dave C. S. Beddows

Department of Physics, University of Wales Swansea, Singleton Park, Swansea?SA2?8PP, United Kingdom

Jozef Kaiser

Institute of Physical Engineering, Technical University of Brno, Technicka´ 2, 616?69?Brno, Czech Republic

Sergei V. Kukhlevsky

Department of Physics, Janus Pannonius University, Ifju´sa´g u´. 6, Pe´cs?7624, Hungary

Miroslav Lisˇka

Institute of Physical Engineering, Technical University of Brno, Technicka´ 2, 616?69?Brno, Czech Republic

Helmut H. Telle

Department of Physics, University of Wales Swansea, Singleton Park, Swansea?SA2?8PP, United Kingdom

Jim Young

Applied Photonics Ltd, Unit 8, Carleton Business Park, Skipton?BD23?2AA, United Kingdom

Opt. Eng. 39(8), 2248-2262 (Aug 01, 2000). doi:10.1117/1.1304855
History: Received June 11, 1999; Revised Dec. 27, 1999; Accepted Feb. 11, 2000
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Abstract

A realization of laser-induced breakdown spectroscopy for real-time, in situ and remote analysis of trace amounts in liquid samples is described, which is potentially applicable to the analysis of pollutants in water in harsh or difficult-to-reach environments. Most of the measurements were conducted using a fiber assembly that is capable of both delivering the laser light and collecting the light emitted from the micro plasma, up to about 30 m from the target area. Alternatively, a telescopic arrangement for line-of-sight measurements was employed, with a range of 3 to 5 m. For internal standardization and the generation of concentration calibration curves, reference lines of selected elements were used. In the majority of cases calibration against the matrix element hydrogen was employed using the Hα,Hβ, and Hγ lines, but also spiking with selected reference species was utilized. In order to provide high reliability and repeatability in the analyses, we also measured plasma parameters such as electron density, plasma temperature, and line-shape functions, and determined their influence on the measurement results. Numerous elements, including a range of toxic heavy metals, have been measured over a wide range of concentrations (Al, Cr, Cu, Pb, Tc, U, and others). Limits of detection usually were in the range of a few parts per million; for several elements even lower concentrations could be measured. © 2000 Society of Photo-Optical Instrumentation Engineers.

© 2000 Society of Photo-Optical Instrumentation Engineers

Citation

Ota Samek ; Dave C. S. Beddows ; Jozef Kaiser ; Sergei V. Kukhlevsky ; Miroslav Lisˇka, et al.
"Application of laser-induced breakdown spectroscopy to in situ analysis of liquid samples", Opt. Eng. 39(8), 2248-2262 (Aug 01, 2000). ; http://dx.doi.org/10.1117/1.1304855


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