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Radiofrequency Plasma Ionization/Time-of-Flight Mass Spectrometer for Real-Time Monitoring of Trace Chemical Vapors During OB/OD Operations.

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Final rept. 8 Apr-3 Nov 96,

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Report developed under SBIR contract. There is a great need to develop a real-time analytical technique for monitoring trace vapor emissions during open burningopen detonation OBOD testing in BangBox facilities. In Phase I of this study, a corona discharge atmospheric pressure ionizationtime-of-flight mass spectrometer CDAPITOFMS was successfully developed and evaluated for analyzing permanent gas, volatile organic, semi-volatile organic, and toxic metal target analytes selected from previous OBOD tests. Mass spectra illustrating selectivities were obtained. Sensitivities in the parts-per-trillion range and calibration curves were determined for various analytes. The CDAPITOFMS was shown to be more sensitive than GCMS, SFCMS, and FTIR. A detailed design of a prototype CDAPITOFMS for construction and testing during Phase II of this project was produced. The new design emphasizes improved instrument performance and facilitates instrument manufacturing and commercialization. All Phase I objectives were accomplished. Successful development of the proposed technology will significantly reduce the time and cost of obtaining OBOD vapor emission data, and provide instrumentation for monitoring alternative methods such as incineration. The technology also has application to explosives and drug detection. Commercial applications include monitoring of workplace air environments, sniffing of hazardous waste sites, and monitoring of chemical process streams.

Subject Categories:

  • Inorganic Chemistry
  • Physical Chemistry
  • Ammunition and Explosives
  • Atomic and Molecular Physics and Spectroscopy
  • Combustion and Ignition

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