Improving Ion Mobility Spectrometry Detection Methods for Trace Forensics and Military Field Applications
Uniformed Services University Of The Health Sciences Bethesda United States
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Ion mobility spectrometry IMS is a proven technology for field portable detection of vapor phase explosive compounds due to its high sensitivity and rapid analysis. However, IMS technology is limited in identifying complex samples in the field due to poor resolution and limited dynamic range. Combining gas chromatography GC to IMS can overcome some of the limitations by separating the components in a mixture before detection however, the addition of GC increases system complexity and lengthens analysis times. The performance characteristics of the IMS and GCIMS operational modes of the GC-IONSCAN were evaluated to determine if GCIMS is more reliable than IMS in the detection of explosive compounds amidst interferents. Five explosive compounds HMTD, PETN, RDX, TATP, and TNT and four were used.