title: Ion-exchange separation and ultraviolet  determination of phenylephrine, codeine, and selected antihistamines.
mesh_terms: D002744:Chlorpheniramine / Q000032:analysis*; D002852:Chromatography, Ion Exchange; D003061:Codeine / Q000032:analysis*; D006634:Histamine H1 Antagonists / Q000032:analysis; D010632:Pheniramine / Q000032:analysis; D010656:Phenylephrine / Q000032:analysis*; D011398:Promethazine / Q000032:analysis*; D013053:Spectrophotometry; D014466:Ultraviolet Rays
chemical_list: D006634:Histamine H1 Antagonists; D010632:Pheniramine; D010656:Phenylephrine; D002744:Chlorpheniramine; D011398:Promethazine; D003061:Codeine