NDLI: Analysis of the volatile chemical markers of explosives using novel solid phase microextraction coupled to ion mobility spectrometry.

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Analysis of the volatile chemical markers of explosives using novel solid phase microextraction coupled to ion mobility spectrometry.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Guerra, Patricia Lai, Hanh Almirall, José R.
Description	Country affiliation: United States Author Affiliation: Guerra P ( Department of Chemistry and Biochemistry, International Forensic Research Institute, Florida International University, Miami 33199, USA.)
Abstract	Ion mobility spectrometry (IMS) is routinely used in screening checkpoints for the detection of explosives and illicit drugs but it mainly relies on the capture of particles on a swab surface for the detection. Solid phase microextraction (SPME) has been coupled to IMS for the preconcentration of explosives and their volatile chemical markers and, although it has improved the LODs over a standalone IMS, it is limited to sampling in small vessels by the fiber geometry. Novel planar geometry SPME devices coated with PDMS and sol-gel PDMS that do not require an additional interface to IMS are now reported for the first time. The explosive, 2,4,6-trinitrotoluene (TNT), is sampled with the planar SPME reaching extraction equilibrium faster than with fiber SPME, concentrating detectable levels of TNT in a matter of minutes. The surface area, capacity, extraction efficiency, and LODs are also improved over fiber SPME allowing for sampling in larger volumes. The volatile chemical markers, 2,4-dinitrotoluene, cyclohexanone, and the taggant 4-nitrotoluene have also been successfully extracted by planar SPME and detected by IMS at mass loadings below 1 ng of extracted analyte on the planar device for TNT, for example.
File Format	HTM / HTML
ISSN	16159306
Issue Number	15
Volume Number	31
e-ISSN	16159314
Journal	Journal of Separation Science
Language	English
Publisher	Wiley-VCH
Publisher Date	2008-08-01
Publisher Place	Germany
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Discipline Analytical Discipline Chemistry Cyclohexanones Analysis Dinitrobenzenes Mass Spectrometry Methods Solid Phase Microextraction Toluene Analogs & Derivatives Trinitrotoluene Chemistry Explosive Agents Instrumentation Particle Size Reproducibility Of Results Sensitivity And Specificity Surface Properties Time Factors Volatilization Journal Article Research Support, U.s. Gov't, Non-p.h.s.
Content Type	Text
Resource Type	Article
Subject	Analytical Chemistry Filtration and Separation

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Analysis of the volatile chemical markers of explosives using novel solid phase microextraction coupled to ion mobility spectrometry.

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