Forensic science international
July 1, 2015
José Coelho Neto
51 citations
Blotter papers seized on the streets were tested directly with ATR-FTIR spectroscopy, without any sample preparation. Both sides of each blotter were examined. In 66.7% of cases, the blotters contained one or more types of NBOMEs, confirming the growing presence of these novel substances. Some blotters contained MAL (methallylescaline), a mescaline-like compound, later confirmed by GC-MS or LC-MS. LSD was below the detection limit of the method. The ATR-FTIR results were validated against independent GC-MS or LC-MS results.
Analytical methods : advancing methods and applications
November 23, 2023
Mariana C C Diniz, Fabiana de Moura, Yuri Machado et al.
1 citation
A new method uses paper triangles rubbed directly onto seized tablets and blotter paper to detect new psychoactive substances (NPS) via paper spray ionization mass spectrometry (PS-MS). The approach identified LSD, amphetamines, N-benzyl-substituted phenethylamines, synthetic cathinones, and synthetic cannabinoids in real samples. Sample preservation was excellent: less than 5% mass loss occurred even after 27 consecutive analyses, and no significant signal decrease was observed in the mass spectrometry. The method eliminates wet extraction, using only 10 μL of solvent per analysis, making it fast, inexpensive, and waste-minimizing. The intact sample can be retained for further forensic testing.
Forensic Toxicology
July 1, 2017
José Coelho Neto, Ana Flávia B. Andrade, Rogério Araújo Lordeiro et al.
25I-NBOH, a novel psychoactive substance found on blotter paper in Brazil, can be misidentified as 2C-I by routine gas chromatography–mass spectrometry (GC–MS) because it degrades into 2C-I inside the injector unless a derivatization procedure is used. A slight adjustment to the standard GC–MS method—shortening the solvent delay window—enables detection of an additional early chromatographic peak from the degradation, allowing distinction between 25I-NBOH and 2C-I without derivatization and preventing misidentification.