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Fort Worth, TX, United States

Johnson R.D.,Tarrant County Medical Examiners Office | Botch-Jones S.R.,FTox Consulting | Flowers T.,Tarrant County Medical Examiners Office | Lewis C.A.,Tarrant County Medical Examiners Office
Journal of Analytical Toxicology | Year: 2014

As potent serotonin (5-HT2A) receptor agonists, the NBOMe class of drugs including 25B-, 25C-, 25D-, 25H-, 25I-and 25T2-NBOMe is frequently abused due to the intense hallucinations that they induce. From the limited literature available, the concentration of these NBOMe compounds reported in postmortem cases is exceedingly low. In most instances, published concentrations are <0.50 ng/mL. Therefore, the need for a sensitive, rapid and comprehensive analytical method for the quantification of these compounds was evident. In addition to the more publicized analog 25I-NBOMe, evaluation of 25B-, 25C-, 25D-, 25H and 25T2-in whole blood, plasma and urine was conducted. This publication presents the data obtained from the validation of a liquid chromatography-tandem mass spectrometry method for the simultaneous quantification of these six NBOMe analogs. The method utilizes ultra-performance liquid chromatography technology for the separation followed by positive electrospray ionization of each analog. Limits of quantification for these analogs ranged from 0.01 to 0.02 ng/mL (10-20 pg/mL) with typical linear dynamic ranges of 0.01-20 ng/mL. Data for recovery, intraday control accuracy and precision, matrix effects, ion suppression/enhancement and analyte stability are included. Validation was completed in whole blood, plasma and urine. Short run times and high sensitivity afforded by this newly validated analytical method that allows for the detection of these six analogs in the most common toxicological matrices and can be applied to both ante-and postmortem specimens. © The Author 2014. Published by Oxford University Press. Source

Johnson R.D.,Tarrant County Medical Examiners Office | Botch-Jones S.R.,Tarrant County Medical Examiners Office
Journal of Analytical Toxicology | Year: 2013

The analysis of designer drugs, including those in the synthetic cathinone and piperazine classes, may be complicated by the poor stability of these compounds in biological specimens. The stability of four of these compounds was investigated: 3,4-methylenedioxypyrovalerone, 4-methyl-N-methylcathinone (mephedrone), N-benzylpiperazine and 1-[3-(trifluoromethyl)phenyl]piperazine. Compound stability was monitored in three different biological matrices when each matrix was stored under three different conditions. These matrices and conditions included human whole blood, human serum and human urine, each stored at -20, 4 and 228C for a period of 14 days in the dark in a sealed glass container. Analysis by liquid chromatography-tandem mass spectrometry was performed on Day 1 to establish the initial concentration for each drug in each specimen type, and then the samples were divided into three parts for storage under the various conditions. Analysis was performed in triplicate on Days 2, 4, 7 and 14 for each specimen type under each storage condition and the results were compared to those obtained on Day 1. Following analysis of the data, it became clear that mephedrone was not stable, and that care must be taken following specimen receipt to ensure minimal degradation. © The Author [2013]. Published by Oxford University Press. All rights reserved. Source

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