Additively Manufactured Electrodes for Simultaneous Detection of 2,4,6-Trinitrotoluene and Cyclotrimethylenetrinitramine in Postexplosive Residues and Environmental Samples
Year: 2025
Type: article
Abstract: High Resolution Image Download MS PowerPoint Slide This work reports the use of a custom-made filament based on polylactic acid and graphite to construct additively manufactured working electrodes, using fused filament fabrication 3D-printing technology, to simultaneously detect the explosives 2,4,6-trinitrotoluene (TNT) and cyclotrimethylenetrinitramine (RDX). We propose a simple strategy to increase detectability that consists of an electrochemical preconcentration step (−1.3 V vs Ag|AgCl|KCl (sat.) for 30 s) to reduce RDX and TNT species on the 3D-printed electrode prior a single differential pulse stripping voltammetry scan in Britton–Robinson buffer (pH = 6.0). Linear ranges of 2.5–30 μmol L –1 and 50–500 μmol L –1 and limit of detection (LOD) values of 0.57 and 8.67 μmol L –1 were achieved for TNT and RDX, respectively. With this approach, it was possible to identify TNT and RDX in seawater and post-explosive samples. Recovery values (80–99%) for both compounds in tap water without a sample dilution step achieved through the standard addition method, attested the high performance of proposed method. This work highlights that 3D-printing technology is a powerful tool to construct portability and system for determining nitrocompounds in environmental and forensic applications.
Source: ACS Omega
Institution: Universidade Federal de Uberlândia
Language: English
Subfield: Electrochemistry
Field: Chemistry
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $1,935
Awards: G1032728557, G1056101883, MANUTENÇÃO E MODERNIZAÇÃO DO LABORATÓRIO MULTIUSUÁRIOS DO CAMPUS SANTA MÔNICA (RELAM-UFU), G1073894373, G1426168670, G1608288300, G2880144948, G2938962449, G320047030, G3295047012, CONSTRUÇÃO DE UM SISTEMA AUTOMÁTICO DE ANÁLISE UTILIZANDO AS FACILIDADES DA TECNOLOGIA DE IMPRESSÃO 3D, G3658987473, G3860180106, G408988344, G4184984705, G4610996337, G4682801496, G4822038970, G6784438446, G704333685, G7599271551, G7749191686, G7977213109, REDE MINEIRA DE CIÊNCIAS FORENSES, G8866109996
OpenAlex ID: W4411208819