Rapid gas chromatography-mass spectrometry (GC-MS) is used for detecting chemical warfare agents
The document details the use of a transportable Gas Chromatography/Mass Spectrometry (GC-MS) system for the quick and accurate identification of dangerous chemicals, specifically chemical warfare agents. The system utilizes a Low Thermal Mass (LTM) resistively-heated GC column module to provide compactness and rapid response capabilities suitable for field operations by first responders and military forces.
The note presents experimental results demonstrating the separation of various agents including sarin (GB), soman (GD), sulfur mustard (HD), GF, and VX. It covers sample introduction methods such as direct injection, Solid Phase Microextraction (SPME) headspace sampling, and thermal desorption for simulant analysis.
The system is capable of rapidly separating mixtures containing O-isopropyl methylphosphonofluoridate (GB, or sarin), O-pinacolyl methylphosphonofluoridate (GD, or soman), bis(2-chloroethyl) sulfide (HD, or sulfur mustard), cyclohexyl methylphosphonofluoridate (GF), and O-ethyl S-(2-diisopropylaminoethyl) methylphosphonothiolate (VX).
Separations are completed in less than three minutes using rapid column temperature programming.
The mass spectrometer was operated in Scan mode with an m/z range of 50-300.