The ongoing development of specialty instrumentation based on proven methodologies in trace organic analysis was described. Three systems were discussed, including thermal sample processing (EPyA), the nonthermal sample processing analyzer (CHAMP), and applied artificial intelligence/expert system networks. The automated prototype units featured advanced sample processing with interfaces for on line analyses with chromatographic and/or spectral detectors. Thermal sample processing was provided by EPyA, including modules for purge and trap/thermal desorption, dynamic headspace, and pyrolysis. Nonthermal multi sample processing was conducted with CHAMP based on supercritical fluid extraction and specialty interface units. The system has successfully analyzed low parts per billion levels of vapors, aerosols, particulates, gasoline, and soils. MicroEXMAT, a developing expert system network, encoded expertise to guide analysts in analytical strategy, instrumental configurations, and method development for the proposed on site analyzers.
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