Evaluation of Two Spectroscopic Techniques to Estimate the MDMA Dose of Ecstasy-Like Tablets, an On-Site Approach.
N Meert, K Segers, F Van Durme, J Eliaerts
Drug Testing and Analysis July 22, 2025 DOI: 10.1002/dta.3933 (opens in new tab)
Study at a glance
AI-extracted from the abstract| Characteristics | Evaluation study Peer reviewed |
|---|---|
| Sample size | 98 |
| Population | Seized MDMA tablets |
| Topics | MDMA |
| Keywords | Drug analysis Drug testing Drug quantification Substance analysis Illicit drug detection Chemical analysis Spectroscopic techniques Nir Ftir Infrared spectroscopy Chemical spectroscopy On-site testing Rapid testing Portable analysis Field testing Point-of-use testing Mobile analysis Illicit drugs Controlled substances Narcotics |
| Key points | Both portable NIR and FT-IR spectroscopy combined with chemometric modeling provide reliable on-site MDMA dose estimation in tablets, though they do not capture all health risks. |
Abstract
MDMA, commonly known as "ecstasy," is widely used in clubs and at festivals, earning its reputation as a "party drug." The increasing demand for rapid on-site dose estimation of MDMA in tablets arises from the need of various stakeholders, including law enforcement, emergency services, and public health officials, to respond appropriately to potential public safety risks and incidents. This study evaluates the performance of two portable spectroscopic techniques (near-infrared [NIR] and Fourier-transform-infrared [FT-IR]) combined with chemometric modelling for estimating the MDMA dose in tablets. Ninety-eight seized tablets were measured on-site with both spectroscopic techniques and confirmed by the reference techniques: gas chromatography (GC) combined with a mass spectrometer (MS) and a flame-ionization detector (FID). Considering the correlation values (NIR: R2 = 0.64 for indirect contact with intact tablets, 0.87 for direct contact with homogenized tablets; FT-IR: R2 = 0.84) and the RMSEP values (NIR: 8.0 for indirect contact with intact tablets, 5.9 for direct contact with homogenized tablets; FT-IR: 5.4), both spectroscopic techniques provide a reliable dose prediction in comparison to the GC-FID results. Moreover, these devices are suitable for rapid on-site application. The instruments' choice depends on several factors, such as speed, safety measures, and laboratory support for modelling. However, determining the MDMA dose does not address all health risks. Other factors, such as the presence of low-dosed substances (undetectable on-site) and the combination of MDMA with other drugs and/or alcohol also play a significant role. Therefore, laboratory analysis remains essential for comprehensive safety assessment.