Wood-Cased Pencil Graphite as Voltammetric Sensor and Sampling by Drone for Field Detection of 2,4,6-Trinitrotoluene Explosive.

ABSTRACT: This study introduces a novel approach for detecting 2,4,6-trinitrotoluene (TNT) explosives using a pencil-based sensor. The sensor utilizes the circular area of a 3 mm diameter pencil lead enclosed by a wooden shaft as the working electrode. Graphene and silver-silver chloride inks are printed onto transparent sticky tapes, as the counter and reference electrodes, respectively. These tapes are affixed to the pencil body, with copper wires as electrical conductors. Differential pulse adsorptive stripping voltammetry of standard TNT solutions (0.5-30 mg L^-1) in 0.5 mol L^-1 NaCl reveals two distinct peak signals at -0.46 and -0.64 V, along with a smaller peak at -0.75 V. The identification of TNT in a sample is confirmed by comparing the ratios of these three peak curre

SUBMITTER: Prasertying P 

PROVIDER: S-EPMC12042780 | biostudies-literature | 2025 Apr

REPOSITORIES: biostudies-literature