Simultaneous Determination of Amphetamine, Methamphetamine, Methylenedioxyamphetamine (MDA), Methylenedioxymethamphetamine (MDMA), and Methylenedioxyethylamphetamine (MDEA) Enantiomers by GC-MS
Journal of Analytical Toxicology October 1, 1999 Dale K. Hensley, John T. Cody 70 citations
A new method simultaneously measures the ratio of l- and d-enantiomers of amphetamine, methamphetamine, MDA, MDMA, and MDEA in urine. The assay uses liquid-liquid extraction, derivatization with l-TPC, and gas chromatography-mass spectrometry. It provides accurate results for amphetamine and methamphetamine at concentrations of 10 ng/mL or higher and for MDA, MDMA, and MDEA at 25 ng/mL or higher. In eight subjects from a controlled MDMA study, the percentage of l-MDMA was initially greater and increased over time. For the metabolite MDA, the d-enantiomer initially dominated, but the l-enantiomer proportion gradually increased, exceeding the d-enantiomer within 36 hours postdose.