title: Conductivity detector for nitrogen compounds: maintenance program enabling gas-liquid chromatographic analysis of trace residues in crude soil extracts.
mesh_terms: D002849:Chromatography, Gas; D004553:Electric Conductivity / Q000295:instrumentation; D006540:Herbicides / Q000032:analysis; D008722:Methods; D009584:Nitrogen / Q000032:analysis; D010573:Pesticide Residues / Q000032:analysis*; D012989:Soil Pollutants / Q000032:analysis*; D013997:Time Factors; D014131:Trace Elements / Q000032:analysis
chemical_list: D006540:Herbicides; D010573:Pesticide Residues; D012989:Soil Pollutants; D014131:Trace Elements; D009584:Nitrogen