Rapid analysis of ecstasy and related phenethylamines in seized tablets by Raman spectroscopy.
S E Bell, D T Burns, A C Dennis, J S Speers
The Analyst March 1, 2000 DOI: 10.1039/a908091k via PubMed
Summary
AI-generated from the abstractRaman spectroscopy using far-red (785 nm) excitation can identify MDMA and related drugs in seized tablets, even when mixed with other materials. The technique produces clear spectra with only two-minute data collection, distinguishing chemically similar substances like MDEA and MBDB, and different forms of the same drug. It also identifies bulking agents and allows semi-quantitative analysis of drug and excipient amounts. The method is rapid, non-destructive, and suitable for automatic sample handling, achieving throughputs of 20 samples per hour.
Study at a glance
| Characteristics | Observational study Peer reviewed |
|---|---|
| Population | Seized tablets of MDMA and related compounds (MDA, MDEA, MBDB, 2C-B, amphetamine sulfate) and pure standards |
| Keywords | Illicit drug detection Substance identification Chemical analysis Forensic drug analysis Illicit drugs |
| Citations | 112 |
| Key finding | Far-red Raman spectroscopy provides rapid, non-destructive identification of MDMA and related drugs in seized samples, distinguishing chemically similar substances and enabling semi-quantitative analysis. |
Abstract
Raman spectroscopy with far-red excitation has been used to study seized, tableted samples of MDMA (N-methyl-3,4-methylenedioxyamphetamine) and related compounds (MDA, MDEA, MBDB, 2C-B and amphetamine sulfate), as well as pure standards of these drugs. We have found that by using far-red (785 nm) excitation the level of fluorescence background even in untreated seized samples is sufficiently low that there is little difficulty in obtaining good quality data with moderate 2 min data accumulation times. The spectra can be used to distinguish between even chemically-similar substances, such as the geometrical isomers MDEA and MBDB, and between different polymorphic/hydrated forms of the same drug. Moreover, these differences can be found even in directly recorded spectra of seized samples which have been bulked with other materials, giving a rapid and non-destructive method for drug identification. The spectra can be processed to give unambiguous identification of both drug and excipients (even when more than one compound has been used as the bulking agent) and the relative intensities of drug and excipient bands can be used for quantitative or at least semi-quantitative analysis. Finally, the simple nature of the measurements lends itself to automatic sample handling so that sample throughputs of 20 samples per hour can be achieved with no real difficulty.