Detecting Trace Explosives and Formulations Using Laser Electrospray Mass Spectrometry
نویسندگان
چکیده
Mass analysis using laser electrospray mass spectrometry (LEMS) is demonstrated for the detection of trace samples of explosives at atmospheric pressure directly from a substrate. A non-resonant femtosecond duration laser pulse vaporizes native samples at atmospheric pressure for subsequent electrospray ionization and transfer into a mass spectrometer. LEMS was used to detect < 1 µg of 2,3-dimethyl-2,3-dinitrobutane (DMNB), cyclotrimethylene-trinitramine (RDX), hexamethylene triperoxide diamine (HMTD), and triacetone triperoxide (TATP) deposited on a steel surface. LEMS was also used to directly analyze composite propellant materials containing an explosive to determine the molecular composition of intact pellets at atmospheric pressure.
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