title: Quantitative determinations by ion-pair extraction. Part 13. Extraction of salicylate and 2-naphthalenesulfonate as ion pairs and adducts with trioctylphosphine oxide.
mesh_terms: D000473:Alkanes; D000588:Amines; D002208:Caproates; D002626:Chemistry, Pharmaceutical; D002725:Chloroform; D007474:Ion Exchange; D009282:Naphthalenesulfonates / Q000032:analysis*; D010720:Phosphines; D000644:Quaternary Ammonium Compounds / Q000032:analysis; D012459:Salicylates / Q000032:analysis*
chemical_list: D000473:Alkanes; D000588:Amines; D002208:Caproates; D009282:Naphthalenesulfonates; D010720:Phosphines; D000644:Quaternary Ammonium Compounds; D012459:Salicylates; D002725:Chloroform