Enantiomeric determination of amphetamine and methamphetamine in urine by precolumn derivatization with Marfey's reagent and HPLC

Bryan S. Foster, Don D. Gilbert, Athiwat Hutchaleelaha, Michael Mayersohn

Research output: Contribution to journalArticle

24 Scopus citations

Abstract

An analytical method was developed for enantiomeric determination of amphetamine and methamphetamine in human urine. The enantiomers were isolated from urine by solid-phase extraction, and diastereomers were formed by derivatization with the chiral Marfey's reagent (1-fluoro-2,4-dinitrophenyl- 5-l-aniline amide). The diastereomers were separated by reversed-phase high- performance liquid chromatography in a water/methanol mobile phase and detected by absorbance spectrophotometry at 340 nm. Linear standard curves were obtained for all four enantiomers over a concentration range of 0.16- 1.00 mg/L in urine. The detection limit was 0.16 mg/L urine for each enantiomer, and the limit of quantitation was 0.40 mg/L. The urine of 10 decedents was analyzed by this method and by a previously published precolumn derivatization procedure using (-)-1-(9-fluorenyl)ethyl chloroformate (FLEC) as the derivatizing agent and fluorescence detection. Comparison of the results of the two methods by linear regression showed comparable results for both d-amphetamine and d-methamphetamine. Neither method detected the presence of the l-enantiomers in the urine samples.

Original languageEnglish (US)
Pages (from-to)265-269
Number of pages5
JournalJournal of Analytical Toxicology
Volume22
Issue number4
DOIs
StatePublished - Jan 1 1998

ASJC Scopus subject areas

  • Analytical Chemistry
  • Environmental Chemistry
  • Toxicology
  • Health, Toxicology and Mutagenesis
  • Chemical Health and Safety

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