title: An evaluation of microextraction/capillary column gas chromatography for monitoring industrial outfalls.
abstract: Microextraction and capillary-column gas chromatography techniques are applied to plant discharge streams for repetitive wastewater discharge permit analyses. This combination allows the analyst to reduce sample preparation since microextraction replaces both purge-and-trap for volatiles and microextraction for semi-volatiles. An additional advantage is the elimination of a concentration step, which is often a major contributor to low method recoveries. The overall procedure is shown to be more precise than purge-and-trap but slightly less precise than conventional extraction. The results of each method are shown to be equivalent.
mesh_terms: D002849:Chromatography, Gas / Q000295:instrumentation*; D007220:Industrial Waste / Q000032:analysis; D012722:Sewage / Q000032:analysis*; D014481:United States; D014484:United States Environmental Protection Agency; D014873:Water Pollutants / Q000032:analysis*; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D007220:Industrial Waste; D012722:Sewage; D014873:Water Pollutants; D014874:Water Pollutants, Chemical