PMID- 10080649 OWN - NLM STAT- MEDLINE DCOM- 19990503 LR - 20190831 IS - 1387-2273 (Print) IS - 1387-2273 (Linking) VI - 723 IP - 1-2 DP - 1999 Feb 19 TI - Quantification of 3,4-methylenedioxymetamphetamine and its metabolites in plasma and urine by gas chromatography with nitrogen-phosphorus detection. PG - 221-32 AB - A gas chromatographic method with nitrogen-phosphorus detection involving a solid-liquid extraction phase was developed and validated for the simultaneous quantification of 3,4-methylenedioxymethamphetamine (MDMA) and 3,4-methylenedioxyamphetamine (MDA) in plasma. A modification of this method was validated for the analysis of MDMA, MDA, 4-hydroxy-3-methoxymethamphetamine (HMMA) and, 4-hydroxy-3-methoxyamphetamine (HMA) in urine. Under the analytical conditions described, the limits of detection in plasma and urine were less than 1.6 microg/l and 47 microg/l, respectively, for all the compounds studied. Good linearity was observed in the concentration range evaluated in plasma (5-400 microg/l) and urine (100-2000 microg/l) for all compounds tested. The recoveries obtained from plasma were 85.1% and 91.6% for MDMA and MDA, respectively. Urine recoveries were higher than 90% for MDMA and MDA, 74% for HMMA, and 64% for HMA. Methods have been successfully used in the assessment of plasma and urine concentrations of MDMA and its main metabolites in samples from clinical studies in healthy volunteers. FAU - Ortuno, J AU - Ortuno J AD - Pharmacology Research Unit, Institut Municipal d'Investigacio Medica (IMIM), Barcelona, Spain. FAU - Pizarro, N AU - Pizarro N FAU - Farre, M AU - Farre M FAU - Mas, M AU - Mas M FAU - Segura, J AU - Segura J FAU - Cami, J AU - Cami J FAU - Brenneisen, R AU - Brenneisen R FAU - de la Torre, R AU - de la Torre R LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - Netherlands TA - J Chromatogr B Biomed Sci Appl JT - Journal of chromatography. B, Biomedical sciences and applications JID - 9714109 RN - 27YLU75U4W (Phosphorus) RN - KE1SEN21RM (N-Methyl-3,4-methylenedioxyamphetamine) RN - N762921K75 (Nitrogen) SB - IM MH - Chromatography, Gas/*methods MH - Humans MH - Male MH - N-Methyl-3,4-methylenedioxyamphetamine/blood/*metabolism/urine MH - Nitrogen MH - Phosphorus MH - Reproducibility of Results MH - Sensitivity and Specificity EDAT- 1999/03/18 00:00 MHDA- 1999/03/18 00:01 CRDT- 1999/03/18 00:00 PHST- 1999/03/18 00:00 [pubmed] PHST- 1999/03/18 00:01 [medline] PHST- 1999/03/18 00:00 [entrez] AID - 10.1016/s0378-4347(98)00506-4 [doi] PST - ppublish SO - J Chromatogr B Biomed Sci Appl. 1999 Feb 19;723(1-2):221-32. doi: 10.1016/s0378-4347(98)00506-4.