A High Efficiency All Glass Sampling and Concentration Device for Adsorptive Semivolatile Organics
A low-volume, inert sampling and enrichment device for semivolatile organic vapors is described. The device consists of two concentric fused silica capillaries. A small portion of the inter-capillary volume, cooled with a burst of compressed carbon dioxide, serves as a trap for the semivolatile organics. The low mass of the trap permits rapid sampling and desorption cycles suitable for applications requiring fast monitoring of 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 interference resulting from cross contamination. The device was successfully used for sampling low concentrations of highly adsorptive nitroaromatic compounds and is applicable for polychlorinated dibenzo-p-dioxins (PCDDs) and polyaromatic hydrocarbons (PAHs).
M. Gehrke et al., "A High Efficiency All Glass Sampling and Concentration Device for Adsorptive Semivolatile Organics," Chemosphere, Elsevier, May 2001.
The definitive version is available at http://dx.doi.org/10.1016/S0045-6535(00)00397-0
Mechanical and Aerospace Engineering
United States. Army Research Office
Library of Congress Subject Headings
Article - Journal
© 2001 Elsevier, All rights reserved.