{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,11,12]],"date-time":"2025-11-12T03:29:58Z","timestamp":1762918198074,"version":"build-2065373602"},"reference-count":18,"publisher":"MDPI AG","issue":"4","license":[{"start":{"date-parts":[[2020,12,9]],"date-time":"2020-12-09T00:00:00Z","timestamp":1607472000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Data"],"abstract":"<jats:p>According to the World Drug Report 2020, cocaine and ecstasy are the most consumed stimulant drugs, with 19 and 27 million estimated users in 2018. In this context, large efforts are being made to design fast and cost-effective analytical methods to track and monitor the distribution networks of these synthetic drugs. Here, we share two datasets of ecstasy pills seized in the northeast of Switzerland between 2010 and 2011. The first contains 621 forensic-grade images of pills, while the second one consists of 486 mid-infrared (mIR) spectra. While both sets are not covering the same seizure, both provide high-quality data with orthogonal information to evaluate clustering and dimension reduction methods.<\/jats:p>","DOI":"10.3390\/data5040116","type":"journal-article","created":{"date-parts":[[2020,12,9]],"date-time":"2020-12-09T09:17:58Z","timestamp":1607505478000},"page":"116","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":3,"title":["Seized Ecstasy Pills: Infrared Spectra and Image Datasets"],"prefix":"10.3390","volume":"5","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-4943-2643","authenticated-orcid":false,"given":"Luc","family":"Patiny","sequence":"first","affiliation":[{"name":"Zakodium S\u00e0rl, 1027 Lonay, Switzerland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Micha\u00ebl","family":"Zasso","sequence":"additional","affiliation":[{"name":"Zakodium S\u00e0rl, 1027 Lonay, Switzerland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1933-2788","authenticated-orcid":false,"given":"Pierre","family":"Esseiva","sequence":"additional","affiliation":[{"name":"Institut de Police Scientifique, Universit\u00e9 de Lausanne, 1015 Lausanne, Switzerland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3416-2572","authenticated-orcid":false,"given":"Julien","family":"Wist","sequence":"additional","affiliation":[{"name":"Chemistry Department, Universidad del Valle, Cali 76008, Colombia"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2020,12,9]]},"reference":[{"key":"ref_1","unstructured":"Zingg, C. (2005). The Analysis of Ecstasy Tablets in a Forensic Drug Intelligence Perspective. [Ph.D. Thesis, Ecole Polytechnique F\u00e9d\u00e9rale de Z\u00fcrich]."},{"key":"ref_2","unstructured":"(2020, October 08). World Drug Report 2020. Available online: https:\/\/wdr.unodc.org\/wdr2020\/index.html."},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"1172","DOI":"10.1002\/dta.2605","article-title":"Variability in content and dissolution profiles of MDMA tablets collected in the UK between 2001 and 2018\u2014A potential risk to users?","volume":"11","author":"Couchman","year":"2019","journal-title":"Drug Test. Anal."},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"100263","DOI":"10.1016\/j.forc.2020.100263","article-title":"Quantification of MDMA in seized tablets using benchtop 1H NMR spectroscopy in the absence of internal standards","volume":"20","author":"Hussain","year":"2020","journal-title":"Forensic Chem."},{"key":"ref_5","first-page":"1944","article-title":"A Validated NMR Approach for MDMA Quantification in Ecstasy Tablets","volume":"29","author":"Almeida","year":"2018","journal-title":"J. Braz. Chem. Soc."},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"105088","DOI":"10.1016\/j.microc.2020.105088","article-title":"Electrochemical detection of 3,4-methylenedioxymethamphetamine (ecstasy) using a boron-doped diamond electrode with differential pulse voltammetry: Simple and fast screening method for application in forensic analysis","volume":"157","author":"Arantes","year":"2020","journal-title":"Microchem. J."},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"413","DOI":"10.1520\/JFS14696J","article-title":"Solid-phase extraction for profiling of ecstasy tablets","volume":"45","author":"Rashed","year":"2000","journal-title":"J. Forensic Sci."},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"87","DOI":"10.1016\/j.forsciint.2006.02.055","article-title":"Impurity profiling of ecstasy tablets seized in Hong Kong by gas chromatography-mass spectrometry","volume":"162","author":"Cheng","year":"2006","journal-title":"Forensic Sci. Int."},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"298","DOI":"10.1016\/j.forsciint.2012.10.004","article-title":"Monitoring of illicit pill distribution networks using an image collection exploration framework","volume":"223","author":"Camargo","year":"2012","journal-title":"Forensic Sci. Int."},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"110498","DOI":"10.1016\/j.forsciint.2020.110498","article-title":"Providing illicit drugs results in five seconds using ultra-portable NIR technology: An opportunity for forensic laboratories to cope with the trend toward the decentralization of forensic capabilities","volume":"317","author":"Coppey","year":"2020","journal-title":"Forensic Sci. Int."},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"234","DOI":"10.1016\/j.forsciint.2006.06.056","article-title":"NIR analysis of cellulose and lactose\u2013application to ecstasy tablet analysis","volume":"167","author":"Baer","year":"2007","journal-title":"Forensic Sci. Int."},{"key":"ref_12","unstructured":"Qing, Y., Cheng, Y.F., and Zhang, X.M. (2011). Field and fast determination of ketamine and caffeine in ecstasy. Chem. Res. Appl., Available online: http:\/\/en.cnki.com.cn\/Article_en\/CJFDTotal-HXYJ201107023.htm."},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"111","DOI":"10.1002\/env.3170050203","article-title":"Positive matrix factorization: A non-negative factor model with optimal utilization of error estimates of data values","volume":"5","author":"Paatero","year":"1994","journal-title":"Environmetrics"},{"key":"ref_14","doi-asserted-by":"crossref","unstructured":"McInnes, L., Healy, J., and Melville, J. (2018). UMAP: Uniform Manifold Approximation and Projection for Dimension Reduction. arXiv.","DOI":"10.21105\/joss.00861"},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"151","DOI":"10.1366\/0003702884428734","article-title":"JCAMP-DX: A Standard Form for Exchange of Infrared Spectra in Computer Readable Form","volume":"42","author":"McDonald","year":"1988","journal-title":"Appl. Spectrosc."},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"772","DOI":"10.1366\/0003702894202201","article-title":"Standard Normal Variate Transformation and De-trending of Near-Infrared Diffuse Reflectance Spectra","volume":"43","author":"Barnes","year":"1989","journal-title":"Appl. Spectrosc."},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"43","DOI":"10.1255\/jnirs.30","article-title":"The Link between Multiplicative Scatter Correction (MSC) and Standard Normal Variate (SNV) Transformations of NIR Spectra","volume":"2","author":"Dhanoa","year":"1994","journal-title":"J. Near Infrared Spectrosc."},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"520","DOI":"10.1002\/mrc.4669","article-title":"The C6H6 NMR repository: An integral solution to control the flow of your data from the magnet to the public","volume":"56","author":"Patiny","year":"2017","journal-title":"Magn. Reson. Chem."}],"container-title":["Data"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/2306-5729\/5\/4\/116\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T10:42:47Z","timestamp":1760179367000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/2306-5729\/5\/4\/116"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2020,12,9]]},"references-count":18,"journal-issue":{"issue":"4","published-online":{"date-parts":[[2020,12]]}},"alternative-id":["data5040116"],"URL":"https:\/\/doi.org\/10.3390\/data5040116","relation":{},"ISSN":["2306-5729"],"issn-type":[{"type":"electronic","value":"2306-5729"}],"subject":[],"published":{"date-parts":[[2020,12,9]]}}}