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Détection de métaux lourds dans les sols par spectroscopie d'émission sur plasma induit par laser (LIBS)

Abstract : In the fields of analysis, control and physical measurement, the laser constitutes a particularly powerful and multi-purpose metrological tool, capable to bring concrete solutions to various matters, including of a societal nature. Among the latter, contamination of sites and soils by heavy metals is an important issue of public health which requires to have measurement means adapted to existing regulations and whose use be sufficiently flexible. As a fast technique which does not need any sample preparation, laser-induced breakdown spectroscopy (LIBS) offers very interesting advantages for making on-site measurements of heavy metals content at the 10-ppm level; the design of a portable system is conceivable in the medium term.
In this work we first show that the femtosecond regime presents no advantages with respect to the standard nanosecond regime for our issue. Then we implement an advanced treatment of LIBS spectra by chemometric techniques whose performances significantly improve the results of qualitative and quantitative analyses of soils samples.
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https://tel.archives-ouvertes.fr/tel-00122546
Contributor : Jean-Baptiste Sirven <>
Submitted on : Wednesday, January 3, 2007 - 1:48:20 PM
Last modification on : Friday, October 23, 2020 - 4:39:26 PM
Long-term archiving on: : Wednesday, April 7, 2010 - 1:32:37 AM

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  • HAL Id : tel-00122546, version 1

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Jean-Baptiste Sirven. Détection de métaux lourds dans les sols par spectroscopie d'émission sur plasma induit par laser (LIBS). Physique Atomique [physics.atom-ph]. Université Sciences et Technologies - Bordeaux I, 2006. Français. ⟨tel-00122546⟩

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