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EPA AIR MONITORING BANK PROPOSAL
Citation:
Lee, Jr., D. EPA AIR MONITORING BANK PROPOSAL. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/D-90/070 (NTIS PB90246216), 1990.
Description:
Specimen banking of air pollution samples has not been attempted because of the complexity of this type of environmental medium. ollutants may exist in air as gases or particles or distributed in between these two states. mpirically, air pollutants may be categorized as volatiles, semivolatiles, or nonvolatiles based on vapor pressure. ince no single collection device exists for all three categories, very different monitoring technologies are required for each. he most promising approach for air specimen banking is to focus on the semivolatile fraction using a sampler that consists of a filter followed by a downstream sorbent material to collect gases. he combined solvent extract of both the filter and the sorbent can thereby be cryogenically preserved for retrospective analysis.
