title: Clean up procedures for PCB analysis on river water extracts.
mesh_terms: D002384:Catalysis; D002849:Chromatography, Gas; D005618:Fresh Water / Q000032:analysis*; D006878:Hydroxides; D008722:Methods; D011078:Polychlorinated Biphenyls / Q000032:analysis*; D013464:Sulfuric Acids; D014867:Water / Q000032:analysis*
chemical_list: D006878:Hydroxides; D013464:Sulfuric Acids; D014867:Water; D011078:Polychlorinated Biphenyls