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Proceedings Paper

Portable sequential injection analyzer for onsite screening for chemical weapons degradation compounds
Author(s): Timothy A. Postlethwaite; Peng Zhang; Herbert L. Lancaster; Christina P. Bacon; David Mensch
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Paper Abstract

In many circumstances, the ability to perform on-site, point-of-collection analysis can play a pivotal role in the goals or requirements of the inquiry. Toward this end, the use of commercial or customized kits, which require the analyst to manually perform the metering and mixing of reagents with the sample and the subsequent visual, spectrophotometric or other interpretation of the results, has become widespread. Often, these methods can suffer from poor reproducibility and sensitivity in addition to being tedious and time consuming. Flow analysis methods, such as traditional flow injection analysis (FIA) and the more recent sequential injection analysis (SIA), have found widespread use in the automation of sample and reagent handling and subsequent analysis for many important analytes. These methods can be completely automated and offer excellent reproducibility, minimized analysis time, and in certain configurations, very high sensitivity. We have developed a miniaturized, fully portable SIA-based instrument for on-site screening for chemical weapons degradation products during challenge inspections under the Chemical Weapons Convention, as well as for the sensitive analysis of other important environmental analytes. In this paper, we will discuss our portable SIA design, the analytical approaches utilized, and results obtained for the analysis of representative chemical weapons degradation compounds.

Paper Details

Date Published: 21 February 2002
PDF: 12 pages
Proc. SPIE 4575, Chemical and Biological Early Warning Monitoring for Water, Food, and Ground, (21 February 2002); doi: 10.1117/12.456913
Show Author Affiliations
Timothy A. Postlethwaite, Constellation Technology Corp. (United States)
Peng Zhang, Constellation Technology Corp. (United States)
Herbert L. Lancaster, Constellation Technology Corp. (United States)
Christina P. Bacon, Constellation Technology Corp. (United States)
David Mensch, Constellation Technology Corp. (United States)


Published in SPIE Proceedings Vol. 4575:
Chemical and Biological Early Warning Monitoring for Water, Food, and Ground
Janet L. Jensen; Larry W. Burggraf, Editor(s)

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