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Shawn P Vorce

Office of the Armed Forces Medical Examiner, Division of Forensic Toxicology, Armed Forces Institute of Pathology, 1413 Research Boulevard, Building 102, Rockville, Maryland 20850-3125, USA.

3 papers in the library · 137 citations · publishing 2004-2016

Papers

A general screening and confirmation approach to the analysis of designer tryptamines and phenethylamines in blood and urine using GC-EI-MS and HPLC-electrospray-MS.

Journal of analytical toxicology September 1, 2004 Shawn P Vorce, Jason H Sklerov 79 citations

A gas chromatography-mass spectrometry method was developed to screen for six designer tryptamines and phenethylamines recently added to the DEA's controlled substances list. The method detects pentafluoropropionic derivatives of AMT, DMT, 2CB, DPT, 2C-T-7, and 5-MeO-DiPT, with detection limits of 5-10 ng/mL and linearity from 50 to 1000 ng/mL. It was successfully applied to blood and urine from suspected AMT intoxications. Confirmation of 5-MeO-DiPT in one subject's urine by liquid chromatography-mass spectrometry yielded a concentration of 229 ng/mL, with linearity from 25 to 1500 ng/mL and a detection limit of 5 ng/mL. Two additional peaks suggested metabolites 5-MeO-iPT and 5-MeO-DiPT-N-oxide.

Detection of 25C-NBOMe in Three Related Cases.

Journal of analytical toxicology July 1, 2016 John J Kristofic, Jeffrey D Chmiel, George F Jackson et al. 34 citations

A 23-year-old Caucasian male died after being subdued by military law enforcement, having experienced severe respiratory distress. Autopsy revealed mild to moderate coronary atherosclerosis, biventricular dilation, mild right ventricular hypertrophy, and bilateral pulmonary edema and congestion. Blood contained no drugs or ethanol, but urine had pseudoephedrine, nicotine, and cotinine. A designer drug screen detected 25C-NBOMe, 25C-NBOH, and 2C-C in blood and urine. 25C-NBOMe concentrations were measured in blood (2.07 ng/mL), urine (27.43 ng/mL), and various organs. The medical examiner ruled the cause of death as 25C-NBOMe toxicity temporally associated with excited delirium and forcible restraint, manner accidental.

The detection and quantitative analysis of the psychoactive component of Salvia divinorum, salvinorin A, in human biological fluids using liquid chromatography-mass spectrometry.

Journal of analytical toxicology January 1, 2008 Pamela C Mcdonough, Justin M Holler, Shawn P Vorce et al. 24 citations

A new analytical method using solid-phase extraction with liquid chromatography-electrospray ionization mass spectrometry accurately detects and quantifies the psychoactive compound salvinorin A in human blood and urine. The method reliably measures concentrations between 5.0 and 100 ng/mL, with a detection limit of 2.5 ng/mL and a quantitation limit of 5.0 ng/mL. It provides a robust tool for forensic toxicology to identify salvinorin A in biological fluids, addressing the lack of published methods and supporting research on the compound's health effects and pharmacokinetics.