Abstract
Purpose
Deaths among drug addicts are frequently caused by intoxication with methadone and/or morphine. These drugs are often used in combination with other drugs, such as buprenorphine. In addition, methadone is generally used as a mixture of R- and S-enantiomers. To date, a method for separation and quantitation of these specific drugs has not been developed. The aim of this study was to develop a sensitive enantioselective method for quantitation of morphine, its active metabolite morphine 6-glucuronide, buprenorphine, and R- and S-methadone, in a single analytical run.
Methods
Whole blood samples were diluted with 0.5 mol/L ammonium carbonate buffer and extracted on a Bond Elut C18 solid-phase extraction column with an automatic solid-phase extraction system. Chromatographic separation was performed on a chiral alpha-1-acid glycoprotein column with an acetonitrile/ammonium acetate buffer (10 mmol/L, pH 7.0, 22:78 v/v) mobile phase. The whole blood concentrations of the drugs were quantified by mass spectrometry using their stable isotope-labeled compounds as internal standards.
Results
The method was validated with respect to specificity, linearity, precision, limits of detection, and quantification and matrix effects. The precision (coefficient of variation) was below 15 %, and the accuracy was between 90 and 115 %.
Conclusions
This method will be useful for routine analyses in forensic laboratories where blood samples are frequently analyzed for drugs of abuse. In some cases, sudden death from methadone overdose is caused by the enantiomeric form of the methadone, which makes the enantiomer separation capability of this method important.
Similar content being viewed by others
References
Simonsen KW, Normann PT, Ceder G, Vuori E, Thordardottir S, Thelander G, et al. Fatal poisoning in drug addicts in the Nordic countries in 2007. Forensic Sci Int. 2011;207(1–3):170–6.
Eap CB, Crettol S, Rougier JS, Schlapfer J, Sintra GL, Deglon JJ, et al. Stereoselective block of hERG channel by (S)-methadone and QT interval prolongation in CYP2B6 slow metabolizers. Clin Pharmacol Ther. 2007;81(5):719–28.
Strang J, Metrebian N, Lintzeris N, Potts L, Carnwath T, Mayet S, et al. Supervised injectable heroin or injectable methadone versus optimised oral methadone as treatment for chronic heroin addicts in England after persistent failure in orthodox treatment (RIOTT): a randomised trial. Lancet. 2010;375(9729):1885–95.
Rook EJ, Hillebrand MJX, Rosing H, van Ree JM, Beijnen JH. The quantitative analysis of heroin, methadone and their metabolites and the simultaneous detection of cocaine, acetylcodeine and their metabolites in human plasma by high-performance liquid chromatography coupled with tandem mass spectrometry. J Chromatogr B. 2005;824(1–2):213–21.
Taylor K, Elliott S. A validated hybrid quadrupole linear ion-trap LC-MS method for the analysis of morphine and morphine glucuronides applied to opiate deaths. Forensic Sci Int. 2009;187(1–3):34–41.
Jantos R, Skopp G. Postmortem blood and tissue concentrations of R- and S-enantiomers of methadone and its metabolite EDDP. Forensic Sci Int. 2013;226(1–3):254–60.
Al-Asmari AI, Anderson RA. Method for quantification of opioids and their metabolites in autopsy blood by liquid chromatography-tandem mass spectrometry. J Anal Toxicol. 2007;31(7):394–408.
Rodriguez-Rosas ME, Lofwall MR, Strain EC, Siluk D, Wainer IW. Simultaneous determination of buprenorphine, norbuprenorphine and the enantiomers of methadone and its metabolite (EDDP) in human plasma by liquid chromatography/mass spectrometry. J Chromatogr B Analyt Technol Biomed Life Sci. 2007;850(1–2):538–43.
Buchard A, Linnet K, Johansen SS, Munkholm J, Fregerslev M, Morling N. Postmortem blood concentrations of R- and S-enantiomers of methadone and EDDP in drug users: influence of co-medication and p-glycoprotein genotype. J Forensic Sci. 2010;55(2):457–63.
Holm KM, Linnet K. Chiral analysis of methadone and its main metabolite, EDDP, in postmortem brain and blood by automated SPE and liquid chromatography-mass spectrometry. J Anal Toxicol. 2012;36(7):487–96.
Johansen SS, Linnet K. Chiral analysis of methadone and its main metabolite EDDP in postmortem blood by liquid chromatography-mass spectrometry. J Anal Toxicol. 2008;32(7):499–504.
Rodriguez-Rosas ME, Medrano JG, Epstein DH, Moolchan ET, Preston KL, Wainer IW. Determination of total and free concentrations of the enantiomers of methadone and its metabolite (2-ethylidene-1,5-dimethyl-3,3-diphenyl-pyrrolidine) in human plasma by enantioselective liquid chromatography with mass spectrometric detection. J Chromatogr A. 2005;1073(1–2):237–48.
Wang SC, Ho IK, Wu SL, Liu SC, Kuo HW, Lin KM, et al. Development of a method to measure methadone enantiomers and its metabolites without enantiomer standard compounds for the plasma of methadone maintenance patients. Biomed Chromatogr. 2010;24(7):782–8.
Moody DE, Lin SN, Chang Y, Lamm L, Greenwald MK, Ahmed MS. An enantiomer-selective liquid chromatography-tandem mass spectrometry method for methadone and EDDP validated for use in human plasma, urine, and liver microsomes. J Anal Toxicol. 2008;32(3):208–19.
Bogusz MJ, Maier RD, Erkens M, Driessen S. Determination of morphine and its 3- and 6-glucuronides, codeine, codeine-glucuronide and 6-monoacetylmorphine in body fluids by liquid chromatography atmospheric pressure chemical ionization mass spectrometry. J Chromatogr B Biomed Sci Appl. 1997;703(1–2):115–27.
Dienes-Nagy A, Rivier L, Giroud C, Augsburger M, Mangin P. Method for quantification of morphine and its 3- and 6- glucuronides, codeine, codeine glucuronide and 6-monoacetylmorphine in human blood by liquid chromatography-electrospray mass spectrometry for routine analysis in forensic toxicology. J Chromatogr A. 1999;854(1–2):109–18.
Kolmonen M, Leinonen A, Kuuranne T, Pelander A, Ojanpera I. Hydrophilic interaction liquid chromatography and accurate mass measurement for quantification and confirmation of morphine, codeine and their glucuronide conjugates in human urine. J Chromatogr B Analyt Technol Biomed Life Sci. 2010;878(29):2959–66.
Whittington D, Kharasch ED. Determination of morphine and morphine glucuronides in human plasma by 96-well plate solid-phase extraction and liquid chromatography-electrospray ionization mass spectrometry. J Chromatogr B Analyt Technol Biomed Life Sci. 2003;796(1):95–103.
Peters FT. Method validation using LC-MS. In: Polettini A, editor. Applications of LC-MS in toxicology. London: Pharmaceutical Press; 2006. p. 43–64.
Hand CW, Moore RA, Sear JW. Comparison of whole blood and plasma morphine. J Anal Toxicol. 1988;12(4):234–5.
Acknowledgments
The authors thank laboratory technician Helle Terp for excellent technical assistance. The study was financially supported by The Region of Southern Denmark, Grant Number 09/13450.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Christoffersen, D.J., Brasch-Andersen, C., Thomsen, J.L. et al. Quantification of morphine, morphine 6-glucuronide, buprenorphine, and the enantiomers of methadone by enantioselective mass spectrometric chromatography in whole blood. Forensic Sci Med Pathol 11, 193–201 (2015). https://doi.org/10.1007/s12024-015-9673-9
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s12024-015-9673-9