Affiliation:
1. Division of Drug Research, Department of Biomedical and Clinical Sciences, Faculty of Medicine, Linköping University, Linköping 581 83, Sweden
2. Department of Forensic Genetics and Forensic Toxicology, National Board of Forensic Medicine, Linköping 587 58, Sweden
3. Department of Forensic Science, College of Criminal Justice, Sam Houston State University, 1003 Bowers Blvd, Huntsville, TX, USA
Abstract
Abstract
The purpose of this research was to develop and validate an analytical method for the detection and quantification of noroxymorphone-3ß-D-glucuronide (NOMG), oxymorphone-3ß-D-glucuronide (NOMG), noroxymorphone (NOM), oxymorphone (OM), 6α-oxycodol (αOCL), 6β-oxycodol (βOCL), noroxycodone (NOC) and oxycodone (OC) in urine by liquid chromatography tandem mass spectrometry to be used in a human study. The method was validated according to the Academy Standards Board Standard Practices for Method Development in Forensic Toxicology. The method was then applied to a single-dose pilot study of a subject. Urine samples were collected from the subject after ingesting 10-mg OC as an immediate-release tablet. Additionally, urine specimens (n = 15) that had previously been confirmed positive for OC were analyzed using the validated method. The calibration range for NOMG and OMG was 0.05–10 μg/mL; for all other analytes, it was 0.015–10 μg/mL. Validation parameters such as bias, precision, carryover and dilution integrity, all met the validation criteria. After the method was validated, urine samples from the first subject in the controlled dose study were analyzed. It was observed that OC, NOC and OMG contained the highest concentrations and were present in either the 0.5 or 1 h void. NOC and OMG were detected until the 48 h collection, while OC was detectable till the 24 h collection. Time to reach maximum concentration (Tmax) in the urine was achieved within 1.5 h for OC and within 3 h for NOC and OMG. Maximum concentration (Cmax) in the urine for OC, NOC and OMG was 3.15, 2.0 and 1.56 μg/mg, respectively. OC concentrations in authentic urines ranged from 0.015 to 12 μg/mL. Ranges for NOMG and OMG were 0.054–9.7 μg/mL and 0.14–67 μg/mL, respectively. A comprehensive method for the quantification of NOMG, OMG, NOM, OM, αOCL, βOCL, NOC and OC in urine was optimized and met the validation criteria. The concentrations of NOMG and OMG presented in this study provide the details needed in the forensic community to better comprehend OC pharmacokinetics.
Funder
Strategic research area in forensic sciences at the University of Linköping
Publisher
Oxford University Press (OUP)
Subject
Chemical Health and Safety,Health, Toxicology and Mutagenesis,Toxicology,Environmental Chemistry,Analytical Chemistry
Cited by
2 articles.
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