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ANALYSIS SYSTEM FOR TOTAL SULFURIC ACID IN AMBIENT AIR. DEVELOPMENT AND PRELIMINARY EVALUATION
Citation:
Barden, J. ANALYSIS SYSTEM FOR TOTAL SULFURIC ACID IN AMBIENT AIR. DEVELOPMENT AND PRELIMINARY EVALUATION. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/2-81/013 (NTIS PB81159139), 1981.
Description:
A total sulfuric acid analysis (TSAA) system was developed and shown to provide quantitative determinations of sulfuric acid in air at concentrations as low as 0.26 micrograms/cu m. Quantitation at lower concentrations appears to be possible. The general approach in the design and development effort emphasized sample conditioning, rather than detector selectivity, to provide unambiguous detection. Separation of the acid from other sample components was accomplished by stagewise condensation and revaporization; therefore, particulate filters were not required. Effects of major potential interferences (SO2, NH3, and ammonium sulfates) apparently were eliminated by the addition of a small amount of hydrogen chloride to the sample.