Three separate methods for analyzing oxygenerated volatile organic compounds in ambient air samples are compared and the appropriateness of each method in quantifyingspecific oxygenated VOCs is assessed. The first methd included in the comparision consists of a modified EPA Method TO-14, in which asample air is cryogenically trapped from plished-interior-surface s tainless steel canisters and analzed via high resolution gas chromatography with flame ionization detection. In the latter two methods, oxygenated VOCs in air samples are trapped onto multiadsorbent-bed tubes, trapped water is purged from the sorbent bed with intert gas, then the samples are analyzed by either GC/FTIR/MS or high resolution gas chromatography with flame ionization detection. The confounding effects of water present in samples are addressed for each of the methods in this study.
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