title: A liquid chromatography tandem mass spectrometry method for the simultaneous quantification of 20 drugs of abuse and metabolites in human meconium.
abstract: A method for the simultaneous quantification of 20 cocaine, amphetamine, opiate, and nicotine analytes in meconium, the first neonatal feces, by liquid chromatography tandem mass spectrometry was developed and validated. Specimen preparation included methanol homogenization and solid phase extraction. Two injections were required to achieve sufficient sensitivity and linear dynamic range. Linearity ranged from 0.5-25 up to 500 ng/g (250 ng/g p-hydroxymethamphetamine), and correlation coefficients were >0.996. Imprecision was <10.0% CV, analytical recovery 85.5-123.1%, and extraction efficiencies >46.7% at three concentrations across the linear range. Despite significant matrix effects of -305.7-40.7%, effects were similar for native and deuterated analytes. No carryover, endogenous or exogenous interferences were observed, with analyte stability at room temperature, 4 degrees C, and -20 degrees C and on the autosampler >70%, except for 6-acetylmorphine, hydrocodone, oxycodone, and morphine. Method applicability was demonstrated by analyzing meconium from drug-exposed neonates.
authors.affiliation: Chemistry and Drug Metabolism, Intramural Research Program, National Institute on Drug Abuse, National Institutes of Health, 251 Bayview Blvd., Baltimore, MD 21224, USA.
authors.forename: Teresa R
authors.initials: TR
authors.lastname: Gray
authors.forename: Diaa M
authors.initials: DM
authors.lastname: Shakleya
authors.forename: Marilyn A
authors.initials: MA
authors.lastname: Huestis
mesh_terms: D000661:Amphetamine / Q000032:analysis*; D002853:Chromatography, Liquid; D003042:Cocaine / Q000032:analysis*; D005243:Feces / Q000737:chemistry; D006801:Humans; D007231:Infant, Newborn; D008470:Meconium / Q000737:chemistry* / Q000378:metabolism*; D009294:Narcotics / Q000032:analysis*; D012680:Sensitivity and Specificity; D015813:Substance Abuse Detection / Q000379:methods*; D019966:Substance-Related Disorders; D053719:Tandem Mass Spectrometry
chemical_list: D009294:Narcotics; D000661:Amphetamine; D003042:Cocaine