Record Display for the EPA National Library Catalog
RECORD NUMBER: 153 OF 427| Main Title | EPA air monitoring bank. {microfiche} /by Robert E. Lee, Jr. | |||||||||||
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| Author | Lee., R. E. | |||||||||||
| CORP Author | Environmental Protection Agency, Research Triangle Park, NC. Atmospheric Research and Exposure Assessment Lab. | |||||||||||
| Publisher | U.S. Environmental Protection Agency, Atmospheric Research and Exposure Assessment Laboratory, | |||||||||||
| Year Published | 1990 | |||||||||||
| Report Number | EPA/600/D-90/070 | |||||||||||
| Stock Number | PB90-246216 | |||||||||||
| Subjects | Air--Pollution--United States ; Air quality--United States ; Air quality--Standards--United States | |||||||||||
| Additional Subjects | Sample preparation ; Forecasting ; Solvent extraction ; Sorbents ; Cryogenics ; Air filters ; Particles ; Gases ; Air pollution sampling ; Air specimen banks ; Air samplers ; US EPA | |||||||||||
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| Collation | 13 p. : b ill., maps ; 28 cm. | |||||||||||
| Abstract | Specimen banking of air pollution samples has not been attempted because of the complexity of this type of environmental medium. Pollutants may exist in air as gases or particles or distributed in between these two states. Empirically, air pollutants may be categorized as volatiles, semivolatiles, or nonvolatiles based on vapor pressure. Since no single collection device exists for all three categories, very different monitoring technologies are required for each. The 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. The combined solvent extract of both the filter and the sorbent can thereby be cryogenically preserved for retrospective analysis. |
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| Notes | Cover title. "September 1989." "EPA-600/D-90/070." |