title: Determination of amphetamine, methamphetamine and dimethamphetamine in human urine by solid-phase microextraction (SPME)-gas chromatography/mass spectrometry.
abstract: A simple and rapid assay method for three stimulant drugs (amphetamine, methamphetamine, and dimethamphetamine) in human urine using solid-phase microextraction was developed. In solid-phase microextraction, the drugs were equilibrated between the adsorbent coated-fiber and aqueous sample matrix. After adsorption of the analytes, the fiber was directly transferred to the injector of a gas chromatograph, where the analytes were thermally desorbed and subsequently separated by the gas chromatograph and detected by mass spectrometer. The solid-phase microextraction method, which did not require solvents, was found to be a fast and simple analytical method. We optimized the solid-phase microextraction technique, for factors such as the NaCl salt effect (30%), pH effect (pH=12.4), equilibration time (30 min), desorption time (1 min) and coated-fiber type (100 microm poly(dimethylsiloxane)) and detected the stimulants in human urine, obtained from human subjects. The detection limits of each drug were below 1-10 ng/ml. The developed method can be applied to the abused drug test.
authors.affiliation: Bioanalysis and Biotransformation Research Center, Korea Institute of Science and Technology, Seoul, South Korea.
authors.forename: S W
authors.initials: SW
authors.lastname: Myung
authors.forename: H K
authors.initials: HK
authors.lastname: Min
authors.forename: S
authors.initials: S
authors.lastname: Kim
authors.forename: M
authors.initials: M
authors.lastname: Kim
authors.forename: J B
authors.initials: JB
authors.lastname: Cho
authors.forename: T J
authors.initials: TJ
authors.lastname: Kim
mesh_terms: D000661:Amphetamine / Q000652:urine*; D008401:Gas Chromatography-Mass Spectrometry / Q000379:methods*; D006801:Humans; D006863:Hydrogen-Ion Concentration; D008694:Methamphetamine / Q000652:urine*; D009994:Osmolar Concentration; D012680:Sensitivity and Specificity; D012965:Sodium Chloride / Q000494:pharmacology; D015813:Substance Abuse Detection
chemical_list: D008694:Methamphetamine; D012965:Sodium Chloride; D000661:Amphetamine