title: Theophylline analysis by reversed-phase high-pressure liquid chromatography: elimination of interferences.
mesh_terms: D000667:Ampicillin / Q000302:isolation & purification; D002851:Chromatography, High Pressure Liquid; D006801:Humans; D012463:Saliva / Q000032:analysis; D013806:Theophylline / Q000031:analogs & derivatives / Q000032:analysis* / Q000097:blood; D014970:Xanthines / Q000302:isolation & purification
chemical_list: D014970:Xanthines; D000667:Ampicillin; D013806:Theophylline