Publications by authors named "Thomas Brettell"

Aminoindanes are a class of novel psychoactive substances (NPSs) that have become more prevalent over the past decade. GC-MS is often utilized for identifying seized drugs and is well regarded for its ability to separate mixtures. However, certain aminoindanes have similar mass spectral data and require specific gas chromatographic stationary phases for separation.

View Article and Find Full Text PDF

Rationale: Aminoindanes are one class of many new psychoactive substances that have emerged over the last decade. Analogues of 2-aminoindane (2-AI) are being encountered in crime laboratories and analytical data for most aminoindanes are limited. Interpretation and optimization of gas chromatography-mass spectrometry data will enhance reliability in characterizing aminoindanes.

View Article and Find Full Text PDF

This article contains data from triplicate analyses of ten different TLC mobile phase systems from the analysis of 11 cannabinoid standards using HPTLC. The data includes 1) example plate images for 8 mobile phases during evaluation; 2) example table of calculated average, standard deviation, CV% of R for hexane:acetone (87:13) system during evaluation; 3) images of all case sample plates. The validation of the two chosen mobile phases were done according to the SWGDRUG validation requirements [1].

View Article and Find Full Text PDF

Identifying drug analogs can be a vexing problem for forensic scientists particularly in today's evolving drug market. This study proposes a method that utilizes microcrystalline tests, Raman microspectroscopy, and chemometrics to help solve this problem. In the present case, the method described was used to clearly differentiate and identify phencyclidine (PCP) and four of its analogs, namely tenocyclidine (TCP), rolicyclidine (PCPy), 3-methoxy phencyclidine (3-MeO PCP), and 4-methoxy phencyclidine (4-MeO PCP).

View Article and Find Full Text PDF

Analysis of drugs of abuse constitutes a major portion of work for many crime laboratories. The most important and most utilized technique for the screening and identification of solid-dosage drugs is gas chromatography-mass spectrometry (GC-MS). A detailed practical procedure is described for the rapid screening and identification by GC-MS of most drugs of abuse that are commonly encountered in forensic drug laboratories.

View Article and Find Full Text PDF

A screening method was developed to extract and detect berberine and hydrastine alkaloids from goldenseal root powder and urine samples using HPLC with UV detection. The isocratic method was developed to detect alkaloids in 5 mL of urine prior to drug screening. Urine samples were spiked with the alkaloids at varying concentrations and extracted twice with 3:1 chloroform:2-propanol (CHCl(3):2-propanol).

View Article and Find Full Text PDF

The structure of the hydrated gold(III) tetrachloride salt of L-ecgonine {hydronium tetrakis[(1R,2R,3S,5S,8S)-3-hydroxy-8-methyl-8-azoniabicyclo[3.2.1]octane-2-carboxylate pentakis[tetrachloridoaurate(III)] hexahydrate}, (C(9)H(16)NO(3))(4)(H(3)O)[AuCl(4)](5).

View Article and Find Full Text PDF

The title compound, (1R,2R,3S,5S,8S)-3-hydr-oxy-8-methyl-8-azoniabicyclo-[3.2.1]octane-2-carboxylic acid chloride, C(9)H(16)NO(3) (+)·Cl(-), is both a metabolite and a precursor of the tropane alkaloid l-cocaine.

View Article and Find Full Text PDF