title: A gas chromatographic-positive ion chemical ionization-mass spectrometric method for determination of cocaine, benzoylecgonine, ecgonine methyl ester, and norcocaine in plasma: detection of norcocaine in plasma after oral administration of cocaine.
authors.forename: A C
authors.initials: AC
authors.lastname: Spanbauer
authors.forename: D E
authors.initials: DE
authors.lastname: Moody
authors.forename: R L
authors.initials: RL
authors.lastname: Foltz
authors.forename: S L
authors.initials: SL
authors.lastname: Walsh
mesh_terms: D000284:Administration, Oral; D003042:Cocaine / Q000008:administration & dosage / Q000031:analogs & derivatives* / Q000097:blood*; D008401:Gas Chromatography-Mass Spectrometry / Q000379:methods*; D009294:Narcotics / Q000008:administration & dosage / Q000097:blood*
chemical_list: D009294:Narcotics; C008671:norcocaine; C005618:benzoylecgonine; D003042:Cocaine; C034524:ecgonine methyl ester