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Laser Induced Plasma Fluorescence Spectroscopy Detection of Heavy Metals (Army 2000 SBIR Phase 2)
Investigator: Brian J. Sullivan, 760-438-1010
Company: TACAN Corp., 2330 Faraday Ave., Carlsbad, CA
Contract Information: DAAD05-00-C-7095 (Topic A98-084), Army SBIR Phase II 2000
Period of Performance: 02/29/2000 - 02/29/2002
SBIR Funds: $730,000
Abstract: TACAN Corporation proposes to develop a new and innovative fieldable instrument that can be used for the detection of depleted uranium with sensitivity in the several ppm region. The system will operate in adverse conditions and in the presence of unexploded ordnance. Standard methods for the detection of heavy metals, such as atomic absorption or emission spectroscopy, require instrumentation not suitable for field use. In this work we will develop the innovative use of laser-induced plasmas and fluorescence spectroscopy for the detection of trace amounts of depleted uranium. Laser-induced breakdown spectroscopy has been employed in the detection of heavy metal contaminants in soils, and laser-induced fluorescence has been employed in sensitive detection of heavy metal ions produced in inductively coupled plasma. Through the novel use of optical fibers and compact, robust solid state light sources and detectors, we will design fabricate, and test a portable heavy metal detector. The system shall consist of a central unit containing the laser excitation sources and the spectral detection units, and a compact probe that will be linked by optical fibers. This device will use laser-induced plasma as a means of generating metal ions that can be detected by laser-induced fluorescence. Benefits include the development of a fieldable unit for the rapid detection of heavy metal species in soil and aqueous matrices. Applications of this development include monitoring of environmental remediation sites, detection of heavy metals in buildings and structures, and monitoring and control of industrial processes.