title: A sensitive gas chromatographic method for the determination of methylphenidate (Ritalin) and its major metabolite alpha-phenyl-2-piperidine acetic acid (ritalinic acid) in human plasma using nitrogen-phosphorous detector.
mesh_terms: D002648:Child; D002653:Child Behavior Disorders / Q000097:blood / Q000188:drug therapy; D002849:Chromatography, Gas / Q000379:methods*; D006801:Humans; D008774:Methylphenidate / Q000031:analogs & derivatives* / Q000097:blood* / Q000627:therapeutic use
chemical_list: D008774:Methylphenidate; C009189:ritalinic acid