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Detection and identification of explosives compounds using laser ionization time‐of‐flight techniques
Author(s) -
Marshall Archibald,
Clark Alastair,
Ledingham Kenneth W. D.,
Sander Joseph,
Singhal Ravi P.,
Kosmidis Constantinos,
Deas Robert M.
Publication year - 1994
Publication title -
rapid communications in mass spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.528
H-Index - 136
eISSN - 1097-0231
pISSN - 0951-4198
DOI - 10.1002/rcm.1290080706
Subject(s) - pentaerythritol tetranitrate , chemistry , explosive material , mass spectrometry , analytical chemistry (journal) , nitrobenzene , ionization , mass spectrum , time of flight mass spectrometry , trinitrotoluene , time of flight , ion , chromatography , organic chemistry , catalysis
Resonance‐enhanced multiphoton ionization has been used to detect the presence of vapour‐phase explosive‐type samples in a linear time‐of‐flight (TOF) mass spectrometer. In particular, nitrobenzene, 2‐nitrotoluene, 2,4‐dinitrotoluene, 2,4,6‐trinitrotoluene, ethylene glycol dinitrate, pentaerythritol tetranitrate (PETN), 1,3,5‐trinitro‐1,3,5‐triazacyclohexane (RDX) and SEMTEX (PETN plus RDX plus plasticizer) have been analysed at a laser wavelength of 226.3 nm corresponding to a strong resonant transition of the neutral NO molecule. TOF mass spectra have been recorded and the intensity of the NO + ion monitored as a function of temperature for comparison with the temperature dependence of the various vapour pressures.