Gas chromatography in environmental analysis.
D000397:Air Pollution / Q000032:analysis; D002849:Chromatography, Gas; D004787:Environmental Pollution / Q000032:analysis*; D008433:Mathematics; D008722:Methods; D008832:Microchemistry; D014131:Trace Elements / Q000032:analysis; D014877:Water Pollution, Chemical / Q000032:analysis
D014131:Trace Elements