A validated gas chromatographic–electron impact ionization mass spectrometric method for methylenedioxymethamphetamine (MDMA), methamphetamine and metabolites in oral fluid

An analytical method to simultaneously quantify amphetamine (AMP), methamphetamine (MAMP), methylenedioxymethamphetamine (MDMA), methylenedioxyamphetamine (MDA), methylenedioxyethylamphetamine (MDEA), 3-hydroxy-4-methoxy-methamphetamine (HMMA) and 3-hydroxy-4-methoxy-amphetamine (HMA) in oral fluid is presented. Four hundred microlitres of oral fluid collected via expectoration was extracted by solid phase extraction. GC/MS–EI with selected ion monitoring (SIM) yielded linear curves 5–250 ng/mL for AMP, MAMP, MDMA and MDEA, 5–500 ng/mL for MDA and 25–1000 ng/mL for HMA and HMMA. Recoveries were greater than 85%, accuracy 87–104%, and precision less than 8.3% coefficient of variation. This assay will be used to investigate distribution of sympathomimetic amines into human oral fluid following controlled drug administration.