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Proceedings Paper

Rapid vapor concentrator and detection system for nitroaromatics
Author(s): Kurt Louis Hambacker; Shubhender Kapila; Paul K. Nam; Mark Gehrke; Virgil I. Flanigan
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Paper Abstract

An automated, rapid-cycling vapor concentrator and sensor was designed and evaluated for detection of nitroaromatic compounds. The concentrator consists of an inert deactivated fused silica capillary loop. The temperature of the loop was manipulated through contact with a cold plate or a hot plate. Plates were maintained at pre-selected temperatures with a thermoelectric cooler and a cartridge heater. The low thermal mass of the loop permitted rapid trapping and desorption cycles. The chemical inertness of the fused silica tubing not only led to efficient transfer of nitroaromatics from the air stream to the detection system but also minimized cross contamination between samples. The detection system consisted of a tandem arrangement of electron attachment detectors and an electron attachment reactor. These devices were operated with compact custom electronics. The use of the electron attachment reactor and thermoelectric cooler permitted enhanced selectivity. The device was evaluate for rapid determination of nitroaromatic from air streams at trace concentrations. Detection limits down to sub parts per billion were obtained.

Paper Details

Date Published: 18 October 2001
PDF: 13 pages
Proc. SPIE 4394, Detection and Remediation Technologies for Mines and Minelike Targets VI, (18 October 2001); doi: 10.1117/12.445418
Show Author Affiliations
Kurt Louis Hambacker, Univ. of Missouri/Rolla (United States)
Shubhender Kapila, Univ. of Missouri/Rolla (United States)
Paul K. Nam, Univ. of Missouri/Rolla (United States)
Mark Gehrke, Univ. of Missouri/Rolla (United States)
Virgil I. Flanigan, Univ. of Missouri/Rolla (United States)


Published in SPIE Proceedings Vol. 4394:
Detection and Remediation Technologies for Mines and Minelike Targets VI
Abinash C. Dubey; James F. Harvey; J. Thomas Broach; Vivian George, Editor(s)

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