Direct detection of explosives on solid surfaces by low temperature plasma desorption mass spectrometry
- 25 November 2008
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in The Analyst
- Vol. 134 (1), 176-181
- https://doi.org/10.1039/b816230a
Abstract
In this paper, we have constructed a low temperature plasma (LTP) probe using dielectric barrier discharge (DBD) and employed it for the detection of explosives on a variety of substrates under ambient conditions. Upon discharge, a transient, low-temperature non-equilibrium plasma comprising ions, electrons and metastable atoms are generated between the electrodes. Three common explosives, 2,4,6-trinitrotoluene (TNT), hexahydro-1,3,5-trinitro-1,3,5-trinitro-1,3,5-triazine (RDX), and pentaerythritol tetranitrate (PETN), were directly desorbed and ionized from solid surfaces, followed by subsequent analysis using the mass spectrometer in the negative ion mode. Limits of detection (LODs) were 500 fg for TNT, 1 pg for RDX, and 500 fg for PETN. The reliability of the method was characterized by a successful analysis of a mixture of the three explosives. The ion source also allowed direct detection of trace explosives on both conductive and non-conductive substrates, thus expanding the applicability of low temperature plasma desorption mass spectrometry.Keywords
This publication has 24 references indexed in Scilit:
- Direct detection of explosives on solid surfaces by mass spectrometry with an ambient ion source based on dielectric barrier dischargeJournal of Mass Spectrometry, 2007
- Identification of High Explosives Using Single-Particle Aerosol Mass SpectrometryAnalytical Chemistry, 2007
- Non-proximate detection of explosives and chemical warfare agent simulants by desorption electrospray ionization mass spectrometryChemical Communications, 2006
- Forensic Identification of Inorganic Explosives by Ion ChromatographyAnalytical Letters, 2006
- Direct, trace level detection of explosives on ambient surfaces by desorption electrospray ionization mass spectrometryChemical Communications, 2005
- A rapid and efficient mass spectrometric method for the analysis of explosivesRapid Communications in Mass Spectrometry, 2002
- Forensic identification of explosive oxidizers by electrospray ionization mass spectrometryRapid Communications in Mass Spectrometry, 2002
- Composition of Explosives by Electrospray Ionization Fourier Transform Ion Cyclotron Resonance Mass SpectrometryAnalytical Chemistry, 2002
- The Use of Capillary Electrophoresis in the Detection of Monomethylamine and Benzoate Ions in the Forensic Examination of Explosives ResiduesJournal of Forensic Sciences, 2001
- Application of solid-phase microextraction to the recovery of explosives and ignitable liquid residues from forensic specimensJournal of Chromatography A, 2000