title: LC-ESI-MS/MS analysis for the quantification of morphine, codeine, morphine-3-beta-D-glucuronide, morphine-6-beta-D-glucuronide, and codeine-6-beta-D-glucuronide in human urine.
abstract: A liquid chromatographic-electrospray ionization-tandem mass spectrometric method for the quantification of the opiates morphine, codeine, and their metabolites morphine-3-beta-D-glucuronide (M-3-G), morphine-6-beta-D-glucuronide (M-6-G) and codeine-6-beta-D-glucuronide (C-6-G) in human urine has been developed and validated. Identification and quantification were based on the following transitions: 286 to 201 and 229 for morphine, 300 to 215 and 243 for codeine, 462 to 286 [corrected] for M-3-G, 462 to 286 for M-6-G, and 476 to 300 for C-6-G. Calibration by linear regression analysis utilized deuterated internal standards and a weighting factor of 1/X. The method was accurate and precise across a linear dynamic range of 25.0 to 4000.0 ng/ml. Pretreatment of urine specimens using solid phase extraction was sufficient to limit matrix suppression to less than 40% for all five analytes. The method proved to be suitable for the quantification of morphine, codeine, and their metabolites in urine specimens collected from opioid-dependent participants enrolled in a methadone maintenance program.
authors.affiliation: Chemistry and Drug Metabolism, Intramural Research Program, National Institute On Drug Abuse, National Institutes of Health, 5500 Nathan Shock Drive, Baltimore, Maryland 21224, USA.
authors.forename: Constance M
authors.initials: CM
authors.lastname: Murphy
authors.forename: Marilyn A
authors.initials: MA
authors.lastname: Huestis
mesh_terms: D002138:Calibration; D002853:Chromatography, Liquid; D003061:Codeine / Q000031:analogs & derivatives* / Q000737:chemistry / Q000652:urine*; D006801:Humans; D009020:Morphine / Q000737:chemistry / Q000652:urine*; D009022:Morphine Derivatives / Q000737:chemistry / Q000652:urine*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D021241:Spectrometry, Mass, Electrospray Ionization
chemical_list: D009022:Morphine Derivatives; C035349:morphine-6-glucuronide; D009020:Morphine; C061773:codeine-6-glucuronide; C018108:morphine-3-glucuronide; D003061:Codeine