Determination of amphetamine, methamphetamine, 3,4-methylenedioxyamphetamine, 3,4-methylenedioxyethylamphetamine, and 3,4-methylenedioxymethamphetamine in urine by online solid-phase extraction and ion-pairing liquid chromatography with detection by electrospray tandem mass spectrometry.
Rapid simultaneous determination of amphetamine, methamphetamine, 3,4-methylenedioxyamphetamine, 3,4-methylenedioxymethamphetamine, and 3,4-methyl enedioxyethylamphetamine in urine by solid-phase extraction and GC-MS: a method optimized for high-volume laboratories.
 Nonstandard abbreviations: MDA, 3,4-methylenedioxyamphetamine
; MDMA, 3,4-methylenedioxymethamphetamine; MDEA, 3,4-methylenedioxyethylamphetamine; NICI, negative-ion chemical ionization; GC-MS, gas chromatography-mass spectrometry; S-HFBPCl, S-(-)-N-heptafluorobutyrylprolyl chloride; LOD, limit of detection; IS, internal standard(s); SPE, solid-phase extraction; AT, Agllent Technologies; QC, quality control; ACR, above calibration range sample; LQS, limit of quantification sample; AM, amphetamine; MA, methamphetamine; CI, confidence interval; LOQ, limit of quantification; and HFBP, heptafluorobutyrylprolyl.
 Nonstandard abbreviations: MDMA, 3,4-methylenedioxymethamphetamine; MDA, 3,4-methylenedioxyamphetamine
; HMMA, 4-hydroxy-3-methoxymethamphetamine; S/P, salivary-to-plasma; MBTFA, N-methylbis(trifluoroacetamide); [c.sub.max], peak concentration; [t.sub.max], time to peak concentration; and AUC, area under the curve.
Simultaneous determination of amphetamine, methamphetamine, 3,4-methylenedioxyamphetamine
and 3,4-methylenedioxymethamphtamine in human hair by gas chromatography mass spectrometry.
Distribution of 3,4-methylenedioxymethamphetamine (MDMA) and 3,4-methylenedioxyamphetamine
(MDA) stereoisomers in a fatal poisoning.
RT, retention time; UV, ultraviolet; NA, no absorption peak in the wavelength range of 210-350 nm; MDA, 3,4-methylenedioxyamphetamine
; MDMA, 3,4methylenedioxymethamphetamine.