2 August 1999 Chemical concentrator for rapid vapor detection
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Abstract
This paper presents an innovative microfluidic gas concentrator that uses thermophoresis to concentrate a preselected dilute constituent in air. When used in combination with a gas phase detector, such as an ion mobility spectrometer, the ability of the thermophoretic device to increase the concentration of the target constituent as well as to eliminate other interfering impurities, will substantially increase the sensitivity of the resultant system over the detector alone. The compete sensor could be hand held with an estimated sensitivity of 10-12 to 10-15 atmospheres with detection times of 0.1 to 10 s respectively.
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Michael W. Geis, Michael W. Geis, Roderick R. Kunz, Roderick R. Kunz, } "Chemical concentrator for rapid vapor detection", Proc. SPIE 3710, Detection and Remediation Technologies for Mines and Minelike Targets IV, (2 August 1999); doi: 10.1117/12.357066; https://doi.org/10.1117/12.357066
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