Journal of Forensic Sciences
June 30, 2020
Maria Fernanda Muzetti Ribeiro, Fátima Bento, Antônio José Ipólito et al.
22 citations
A paper-based electrochemical device made from watercolor paper, graphite pencil, and silver paint can detect lysergic acid diethylamide (LSD) in seized samples. The device uses square wave voltammetry and achieves detection and quantification limits of 0.38 and 1.27 μmol/L, respectively. Its performance matches that of a commercial screen-printed carbon electrode, and it successfully distinguished LSD from MDMA and methamphetamine. Recovery from seized samples was less than 10%. The approach offers a low-cost, portable alternative for forensic drug analysis.
ECS Transactions
October 25, 2017
Maria Fernanda Muzetti Ribeiro, Érica Naomi Oiye, Juliana Midori Toya Katayama et al.
8 citations
A simple, fast, and sensitive voltammetric method using a glassy carbon electrode and an aqueous solution of KClO4 as supporting electrolyte quantifies LSD in seized blotters. The anodic peak at 0.88 V vs. Ag/AgCl is proportional to LSD concentration, with detection and quantification limits of 0.987 and 3.29 µmol L⁻¹, respectively, enabling detection at µg per mL of extraction solution. The method also detects 25H-NBOMe, a compound with psychoactive effects similar to LSD. This less polluting methodology offers a practical tool for forensic analysis of these substances.
Forensic Sciences
January 26, 2026
Leandro Oka-Duarte, Bruno Ferreira, Marcelo Firmino de Oliveira
A new method using dried oral fluid spots (DOFS) on watercolor paper pretreated with diluted nitric acid can reliably measure the stimulant drugs MDMA and MDA. The method uses liquid chromatography with a diode-array detector and shows linear results across a wide concentration range (12.5 to 5000 ng mL−1), with detection limits as low as 6 ng mL−1. Recoveries of the drugs from the dried spots ranged from 84% to 98%, and the samples remained stable under various storage conditions. This approach offers a low-cost, practical alternative to liquid oral fluid for forensic drug testing, especially in settings where refrigeration is difficult.