Development of a Fast and Efficient Sample Enrichment Device for Semivolatile Organics
A rapid-cycling, low-volume, and inert sampling and enrichment device for organic vapors is described. The device consists of two concentric fused silica capillaries. A small portion of the inter-capillary volume, which is cooled with a burst of compressed carbon dioxide, serves as a trap for the semivolatile organics. The trap's low mass permits rapid sampling and desorption cycles suitable for applications requiting fast monitoring of volatile and semivolatile chemicals. The device is devoid of switching valves in the sampling train and consequently does not suffer from analyte loss due to irreversible adsorption or cross contamination. The device was successfully used for sampling highly adsorptive nitroaromatic explosives in air at low concentrations.
M. Gehrke et al., "Development of a Fast and Efficient Sample Enrichment Device for Semivolatile Organics," Proceedings of SPIE - The International Society for Optical Engineering, SPIE -- The International Society for Optical Engineering, Jan 1999.
The definitive version is available at http://dx.doi.org/10.1117/12.357067
Article - Conference proceedings
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