Vapor Detection of TNT and RDX Using Atmospheric Pressure Chemical Ionization Mass Spectrometry with Counter-Flow Introduction(CFI).
K. KojimaCentral Research Laboratory, Hitachi LtdMinoru SakairiCentral Research Laboratory, Hitachi LtdYasuaki TakadaCentral Research Laboratory, Hitachi LtdJun NakamuraNational Research Institute of Police Science
2000en
ABI
Abstract
To enable vapor detection of TNT and RDX, we have combined atmospheric pressure chemical ionization (APCI) mass spectrometry with counter-flow introduction (CFI) of sample vapors. The chemical ionization source, which enables high ionization efficiency and highly selective ionization, was attached to a quadrupole mass spectrometer. Using this modified mass spectrometer, we obtained negative mass spectra and detection chromatograms of trinitrotoluene (TNT) and 1,3,5-trinitro-1,3,5-triazacyclohexane (RDX) vapors at room temperature. The explosives detection could be done within 5 s. Our test results from this prototype system demonstrate that this technique is suitable for practical on-line explosives detection.
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