title: [Identification of eleven urea herbicides by thin-layer and gas-liquid chromatography. I. Application to natural waters (author's transl)].
abstract: By the combined use of two-dimensional thin-layer chromatography and gas chromatography (with an electron capture detector), the authors succeeded in separating and identifying eleven urea herbicides at levels of up to 4 ppb. The method has been applied to natural surface waters.
mesh_terms: D002849:Chromatography, Gas / Q000379:methods; D002855:Chromatography, Thin Layer / Q000379:methods; D006540:Herbicides / Q000032:analysis*; D008832:Microchemistry; D014873:Water Pollutants / Q000032:analysis*; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D006540:Herbicides; D014873:Water Pollutants; D014874:Water Pollutants, Chemical
vernacular_title: Identification de onze herbicides du groupe des urées substituées par chromatographie sur couche mince et en phase gazeuse. I. Application aux eaux naturelles