title: [Application of signal multiplier derivative spectrophotometry and equivalent-derivate derivative spectrophotometry to the determination of promethazine and paracetamol in xiretong injection].
authors.forename: L M
authors.initials: LM
authors.lastname: Lin
mesh_terms: D000082:Acetaminophen / Q000032:analysis*; D004338:Drug Combinations; D007267:Injections; D011398:Promethazine / Q000032:analysis*; D013056:Spectrophotometry, Ultraviolet / Q000379:methods
chemical_list: D004338:Drug Combinations; D000082:Acetaminophen; D011398:Promethazine