Reproducible vapor-time profiles using solid-phase microextraction with an externally sampled internal standard.

Abstract

Determination of the dynamic nature of vapor/odor release has application in a wide variety of systems. This study applies automated solid-phase microextraction (SPME) utilizing an externally sampled internal standard (ESIS) to determine the vapor-time profile of odor delivery devices for three classes of explosive compounds. The profiles of delivery systems for target odorants 2,4-dinitrotoluene (2,4-DNT), 2-ethyl-1-hexanol (2-EH), and triacetone triperoxide (TATP) as canine training aids were compared over a period of 70 h. Strategies for evaluating the vapor-time profile of components with widely differing volatility are considered. An approach to quantifying the vapor concentration is described. The differences in the vapor-time profiles are examined and suggestions for selecting the best representative odor delivery technique are outlined.

• Authors: William MacCrehan, Stephanie Moore, Michele Schantz
• Journal: Journal of chromatography. A (J Chromatogr A) Vol. 1244 Pg. 28-36 (Jun 29 2012) ISSN: 1873-3778 [Electronic] Netherlands
• PMID: 22633864 (Publication Type: Journal Article, Research Support, U.S. Gov't, Non-P.H.S.)
• Copyright: Published by Elsevier B.V.

Chemical References

• Dimethylpolysiloxanes
• Dinitrobenzenes
• Heterocyclic Compounds, 1-Ring
• Hexanols
• Peroxides
• triacetone triperoxide
• baysilon
• 2,4-dinitrotoluene
• 2-ethylhexanol

Topics

• Dimethylpolysiloxanes
• Dinitrobenzenes (analysis)
• Gas Chromatography-Mass Spectrometry
• Heterocyclic Compounds, 1-Ring (analysis)
• Hexanols (analysis)
• Odorants (analysis)
• Peroxides (analysis)
• Reference Standards
• Solid Phase Microextraction (methods, standards)
• Temperature