Abstract
A field-deployable Laser Optogalvanic Spectroscopy (LOGS) system is being developed at the Diagnostic Instrumentation and Analysis Laboratory (DIAL) to measure the concentration of metallic species present in the (near) atmospheric pressure off-gases of mixed waste thermal treatment systems, where metallic species occur primarily as airborne metallic and/or oxide particles rather than as free, single atoms. A comparative study of different LOGS atomization sources (electric glow discharges, rf discharge, flames) was performed with respect to the feasibility of deploying each source. The advantages and disadvantages of the various atomization sources will be discussed in terms of real-time monitoring, ease of operation, and ruggedness for field deployment. Although the various atomization sources permit a wide variety of laboratory-based LOGS applications, it is concluded that a flame-based atomization source is the best suited for a fielddeployable LOGS system to monitor airborne metallic species in (near) atmospheric pressure off-gases systems.
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