Trace explosives sampling for security applications (TESSA) study: Evaluation of procedures and methodology for contact sampling efficiency.

Autor: Novosselov IV; Department of Mechanical Engineering, University of Washington, Seattle, WA, USA. Electronic address: ivn@uw.edu., Coultas-McKenney CA; New Mexico Tech, Socorro, NM, USA., Miroshnik L; School of Chemical Engineering, Purdue University, West Lafayette, IN, USA., Kottapalli K; Department of Mechanical Engineering, University of Washington, Seattle, WA, USA., Ockerman B; Department of Mechanical Engineering, University of Washington, Seattle, WA, USA., Manley TE; Signature Science LLC, Austin, TX, USA., Gardner MW; Signature Science LLC, Austin, TX, USA., Lareau R; U.S. Department of Homeland Security, Transportation Security Laboratory, Atlantic City, NJ, USA., Brady J; U.S. Department of Homeland Security, Transportation Security Laboratory, Atlantic City, NJ, USA., Sweat M; Oak Ridge Institute for Science and Education Postdoctoral Fellow at the U.S. Department of Homeland Security, Science & Technology Directorate, Transportation Security Laboratory, Atlantic City International Airport, NJ, USA., Smith AR; Signature Science LLC, Austin, TX, USA., Hargather MJ; New Mexico Tech, Socorro, NM, USA., Beaudoin S; School of Chemical Engineering, Purdue University, West Lafayette, IN, USA.
Jazyk: angličtina
Zdroj: Talanta [Talanta] 2021 Nov 01; Vol. 234, pp. 122633. Date of Electronic Publication: 2021 Jun 29.
DOI: 10.1016/j.talanta.2021.122633
Abstrakt: The detection of trace amounts of explosive materials is critical to the security at mass transit centers (e.g., airports and railway stations). In a typical screening process, a trap is used to probe a surface of interest to collect and transfer particulate residue to a detector for analysis. The collection of residues from the surface being probed is widely viewed as the limiting step in this process. A multi-institutional study was performed to establish a methodology for the evaluation of sampling media collection efficiencies. Dry deposited residues of 1,3,5-trinitroperhydro-1,3,5-triazine (RDX), C-4 (an RDX-based explosive), and pentaerythritol tetranitrate (PETN) were harvested from acrylonitrile butadiene styrene (ABS) plastic, ballistic nylon (NYL), and uncoated aluminum surfaces using muslin, Texwipe cotton, and stainless-steel mesh traps. Transfer and collection efficiencies of the sample media were calculated based on liquid chromatography-mass spectrometry analysis. Dry transfer efficiencies (DTE%) to all tested surfaces were greater than 75%, with transfer to ABS plastic being the lowest. Collection efficiency (CE%) varied significantly across the traps and the surfaces, yet some conclusions can be drawn; nylon had the lowest CE% for all cases (∼10%), and the stainless steel mesh had the lowest CE% for the evaluated traps (∼20%). Though the testing parameters have been standardized among the participants to establish a framework for an independent comparison of contact sampling media and surfaces, substantial variations in the DTE% and the CE% were observed, suggesting that other variables can affect contact sampling.
(Copyright © 2021 Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
Externí odkaz: