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Detection of odor signatures of smokeless powders using solid phase microextraction coupled to an ion mobility spectrometer.
Forensic Sci Int. 2009 Jul 01; 188(1-3):112-8.FS

Abstract

The detection of hidden explosives through their odors is of great importance to law enforcement agencies and trained canines have traditionally been used for this purpose. This paper reports the extraction of odor signature compounds characteristic of smokeless powders, followed by their detection by ion mobility spectrometers (IMS). Such a method enables the detection of odor compounds, complementing canine detection and allows for mass calibration of IMS instruments. The smokeless powder additives reported include diphenylamine (DPA), ethyl centralite, 2-ethyl 1-hexanol and 2,4-dinitrotoluene. The pre-concentration of these volatile odor chemicals from different commercial smokeless powders onto a solid phase microextraction (SPME) device followed by IMS analysis is demonstrated in this paper. Five samples of smokeless powder samples representing double-based and single-based powders from three popular commercial brands were chosen for this study. Diphenylamine was found to be a common additive among all the powders tested. The mass of the analytes in the headspace available for detection was determined from response curves of the corresponding standards. The response curves were generated by printing precise amounts of standards onto substrates and analyzing them. The absolute detection limits were also determined from these response curves and the values ranged from 0.12 to 1.2 ng for the standards. Typical extraction times ranged between 5 and 40 min and the mass of diphenylamine and ethyl centralite extracted at the lowest extraction times was found to be greater than the LOD of the compounds.

Authors+Show Affiliations

Florida International University, Department of Chemistry and Biochemistry, International Forensic Research Institute, United States.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

19410393

Citation

Joshi, Monica, et al. "Detection of Odor Signatures of Smokeless Powders Using Solid Phase Microextraction Coupled to an Ion Mobility Spectrometer." Forensic Science International, vol. 188, no. 1-3, 2009, pp. 112-8.
Joshi M, Delgado Y, Guerra P, et al. Detection of odor signatures of smokeless powders using solid phase microextraction coupled to an ion mobility spectrometer. Forensic Sci Int. 2009;188(1-3):112-8.
Joshi, M., Delgado, Y., Guerra, P., Lai, H., & Almirall, J. R. (2009). Detection of odor signatures of smokeless powders using solid phase microextraction coupled to an ion mobility spectrometer. Forensic Science International, 188(1-3), 112-8. https://doi.org/10.1016/j.forsciint.2009.03.032
Joshi M, et al. Detection of Odor Signatures of Smokeless Powders Using Solid Phase Microextraction Coupled to an Ion Mobility Spectrometer. Forensic Sci Int. 2009 Jul 1;188(1-3):112-8. PubMed PMID: 19410393.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Detection of odor signatures of smokeless powders using solid phase microextraction coupled to an ion mobility spectrometer. AU - Joshi,Monica, AU - Delgado,Yisenny, AU - Guerra,Patricia, AU - Lai,Hanh, AU - Almirall,José R, Y1 - 2009/05/01/ PY - 2009/02/12/received PY - 2009/03/27/accepted PY - 2009/5/5/entrez PY - 2009/5/5/pubmed PY - 2009/5/5/medline SP - 112 EP - 8 JF - Forensic science international JO - Forensic Sci. Int. VL - 188 IS - 1-3 N2 - The detection of hidden explosives through their odors is of great importance to law enforcement agencies and trained canines have traditionally been used for this purpose. This paper reports the extraction of odor signature compounds characteristic of smokeless powders, followed by their detection by ion mobility spectrometers (IMS). Such a method enables the detection of odor compounds, complementing canine detection and allows for mass calibration of IMS instruments. The smokeless powder additives reported include diphenylamine (DPA), ethyl centralite, 2-ethyl 1-hexanol and 2,4-dinitrotoluene. The pre-concentration of these volatile odor chemicals from different commercial smokeless powders onto a solid phase microextraction (SPME) device followed by IMS analysis is demonstrated in this paper. Five samples of smokeless powder samples representing double-based and single-based powders from three popular commercial brands were chosen for this study. Diphenylamine was found to be a common additive among all the powders tested. The mass of the analytes in the headspace available for detection was determined from response curves of the corresponding standards. The response curves were generated by printing precise amounts of standards onto substrates and analyzing them. The absolute detection limits were also determined from these response curves and the values ranged from 0.12 to 1.2 ng for the standards. Typical extraction times ranged between 5 and 40 min and the mass of diphenylamine and ethyl centralite extracted at the lowest extraction times was found to be greater than the LOD of the compounds. SN - 1872-6283 UR - https://www.unboundmedicine.com/medline/citation/19410393/Detection_of_odor_signatures_of_smokeless_powders_using_solid_phase_microextraction_coupled_to_an_ion_mobility_spectrometer_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0379-0738(09)00145-5 DB - PRIME DP - Unbound Medicine ER -
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