Journal
ANALYTICAL CHEMISTRY
Volume 85, Issue 24, Pages 11826-11834Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ac402386m
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Funding
- Defense Threat Reduction Agency
- Defense Threat Reduction Agency Basic Research Program in Nuclear Forensics (at Draper Laboratory) [HDTRA1-11-1-0012]
- University of Tampa
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Transmission mode desorption electrospray ionization (TM-DESI) coupled to an ion trap mass spectrometer capable of source collision-induced dissociation (CID) was used to completely analyze radiological dispersion device components. Source CID significantly enhanced the signal for metal ions by reducing adducts while eliminating chemical noise from background molecules through extensive fragmentation. Source CID spectra yielded reasonably accurate isotopic ratios for the metals studied. By switching the source CID on and off between scans, all major constituents in mixtures of simulated radionuclides and explosives were simultaneously observed. These results indicate that TM-DESI/ion trap technology could be a powerful on-site tool for nuclear forensics.
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