title: Enantiomer-specific high-performance liquid chromatography with fluorescence detection of methamphetamines in abusers' hair and urine.
abstract: Enantiomer-specific high-performance liquid chromatography with fluorescence detection using 4-(4,5-diphenyl-1H-imidazol-2-yl)-benzoyl chloride as a fluorescence labeling reagent was applied to determine methamphetamine and its metabolites in abusers' hair and urine. Hair samples were segmentally analyzed based on 1 cm long segments. In four hair samples, only the S(+)-enantiomers of methamphetamine and its N-demethylated metabolite, S(+)-amphetamine were detected. Satisfactory correlation (r = 0.901) between the results of high-performance liquid chromatography-fluorescence and those of gas chromatography-nitrogen phosphorous detection was obtained (n = 19). In an abuser's urine sample, the S(+)- and R(-)-enantiomers of methamphetamine, amphetamine and para-hydroxymethamphetamine were detected. The degree of N-demethylation of S(+)-methamphetamine into the corresponding metabolite of amphetamine was significantly higher than that of the R(-)-enantiomer.
authors.affiliation: School of Pharmaceutical Sciences, Nagasaki University, 1-14 Bunkyo-machi, Nagasaki 852-8521, Japan.
authors.forename: O
authors.initials: O
authors.lastname: Al-Dirbashi
authors.forename: M
authors.initials: M
authors.lastname: Wada
authors.forename: N
authors.initials: N
authors.lastname: Kuroda
authors.forename: S
authors.initials: S
authors.lastname: Inuduka
authors.forename: K
authors.initials: K
authors.lastname: Nakashima
mesh_terms: D002849:Chromatography, Gas / Q000379:methods; D002851:Chromatography, High Pressure Liquid / Q000379:methods; D006197:Hair / Q000737:chemistry*; D006801:Humans; D008694:Methamphetamine / Q000032:analysis* / Q000493:pharmacokinetics / Q000652:urine; D013050:Spectrometry, Fluorescence / Q000379:methods; D013237:Stereoisomerism; D019966:Substance-Related Disorders / Q000175:diagnosis / Q000652:urine
chemical_list: D008694:Methamphetamine