Hand-Held GC-Ion Mobility Spectrometry for On-Site Analysis of Complex Organic Mixtures in Air or Vapors over Waste Sites.
NIOSH 1991 Feb:153-166
This report demonstrated that gas chromatography/ion mobility spectrometry (GC/IMS) is a viable field monitoring technique and may evolve into a portable and powerful field screening device. For such devices, elevated temperature cells, operating without membranes, would be required. These devices work well for specialized applications. However, use of the Airborne Vapor Monitor as a generalized detector was not feasible without certain modifications. When chromatographic data were included in the training process and mobility data obtained at elevated temperatures were used, neural networks could be successfully used to identify compounds. Retention index could be used to obtain the correct identification when the pattern recognition process fails to identify a compound. Neural networks were system specific. Data obtained on different GC/IMS systems cannot be used to train the network. The small size and low power requirements of GC/IMS combined with the ability to tune the instruments to different applications gives GC/IMS an advantage over many other portable techniques.
Analytical-chemistry; Chemical-analysis; Analytical-methods; Air-quality-monitoring; Environmental-pollution; Waste-disposal; Chromatographic-analysis; Toxic-gases;
Field Screening Methods for Hazardous Wastes and Toxic Chemicals. Second International Symposium, February 12-14, 1991. Sponsored by U.S. EPA; U.S. DOE; U.S. Army Toxic and Hazardous Materials Agency; U.S. Army Chemical Research Development and Engineering Center; U.S.A.F.; Florida State Univ.; National Environmental Technology Applications Corp.; and NIOSH