10.1021/acs.analchem.8b00715.s001
Şener Sağlam
Şener
Sağlam
Ayşem Üzer
Ayşem
Üzer
Erol Erçağ
Erol
Erçağ
Reşat Apak
Reşat
Apak
Electrochemical Determination of TNT, DNT, RDX, and
HMX with Gold Nanoparticles/Poly(Carbazole-Aniline) Film–Modified
Glassy Carbon Sensor Electrodes Imprinted for Molecular Recognition
of Nitroaromatics and Nitramines
American Chemical Society
2018
electroanalyzing nitroaromatics
GC
camouflage materials
HMX
method
Molecular Recognition
nitramine-type
acetylsalicylic acid
RDX explosives
novel electrochemical sensor
DNT
nitro-energetic compounds
calibration curves
sensor electrodes
ANI
passenger belongings
gold nanoparticles
clay soil samples
TNT
Electrochemical Determination
LC
nitro-energetic materials
2018-05-22 00:00:00
Journal contribution
https://acs.figshare.com/articles/journal_contribution/Electrochemical_Determination_of_TNT_DNT_RDX_and_HMX_with_Gold_Nanoparticles_Poly_Carbazole-Aniline_Film_Modified_Glassy_Carbon_Sensor_Electrodes_Imprinted_for_Molecular_Recognition_of_Nitroaromatics_and_Nitramines/6394343
Since
nitroaromatic- and nitramine-type energetic materials, mostly
arising from military activities, are persistent pollutants in soil
and groundwater, on-site sensing of these hazardous chemicals has
gained importance. A novel electrochemical sensor was designed for
detecting nitroaromatic- and nitramine-type energetic materials, relying
on gold nanoparticles (Au<sub>nano</sub>), modified glassy carbon
(GC) electrode coated with nitro-energetic memory–poly(carbazole-aniline)
copolymer (Cz-<i>co</i>-ANI) film (e.g., TNT memory–GC/P(Cz-<i>co</i>-ANI)-Au<sub>nano</sub> modified electrode). Current was
recorded against concentration to build the calibration curves that
were found to be linear within the range of 100–1000 μg
L<sup>–1</sup> for 2,4,6-trinitrotoluene (TNT) and 2,4-dinitrotoluene
(DNT): 50–1000 μg L<sup>–1</sup> for 1,3,5-trinitro-1,3,5-triazacyclohexane
(RDX) and octahydro-1,3,5,7-tetranitro-1,3,5,7-tetrazocine (HMX).
The corresponding limits of detection were 25 μg L<sup>–1</sup> for TNT, 30 μg L<sup>–1</sup> for DNT, and 10 μg
L<sup>–1</sup> for both RDX and HMX, using nitro-energetic
memory–GC/P(Cz-<i>co</i>-ANI)-Au<sub>nano</sub> electrodes.
These electrodes were used separately, and specific determinations
were made in various mixtures of nitro-energetic materials. The developed
method could be efficiently used in electroanalyzing nitroaromatics
and nitramines in military explosives (i.e., comp B, octol, and comp
A5). The sensor electrodes were specific for the tested nitro-energetic
compounds and did not respond to paracetamol-caffeine-based analgesic
drug, acetylsalicylic acid (aspirin), sweetener, and sugar that can
be used as camouflage materials in passenger belongings. The developed
method was statistically validated against the standard LC–MS
reference method in contaminated clay soil samples containing TNT
and RDX explosives.