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Proceedings Paper

Scaling to millijoule energies for laser-induced breakdown spectroscopy of water samples
Author(s): Mike Taschuk; Igor Cravetchi; Ying Y. Tsui; Robert Fedosejevs
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Paper Abstract

The capabilities of laser-induced breakdown spectroscopy (LIBS) for analysis of water samples with low energy laser pulses was investigated using 355 nm, 10 ns pulses with energies from 3.5 to 100 mJ. In order to optimize the detection limit, the spatial and temporal dependence of the line emission from a sodium solution water jet target in air has been measured, allowing the identification of optimum gating time and observation position for sodium. Careful characterization of the background noise sources in the LIBS detection system has been undertaken, including the continuum emission from the plasma, dark current in the detector array and electron emission noise in the image intensifier. The energy dependence of the limit of detection for sodium in water has been investigated. Single shot detection limits for sodium have been measured ranging from 2 ppm to 200 ppm for laser pulse energies of 100 mJ to 3.5 mJ respectively. For aluminium, the detection limits are over an order of magnitude poorer than for sodium.

Paper Details

Date Published: 22 September 2003
PDF: 12 pages
Proc. SPIE 5149, Laser Applications in Medicine, Biology, and Environmental Science, (22 September 2003); doi: 10.1117/12.519768
Show Author Affiliations
Mike Taschuk, Univ. of Alberta (Canada)
Igor Cravetchi, Univ. of Alberta (Canada)
Ying Y. Tsui, Univ. of Alberta (Canada)
Robert Fedosejevs, Univ. of Alberta (Canada)

Published in SPIE Proceedings Vol. 5149:
Laser Applications in Medicine, Biology, and Environmental Science
Gerhard Mueller; Valery V. Tuchin; Gennadii G. Matvienko; Christian Werner; Vladislav Ya. Panchenko, Editor(s)

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