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Arman A, Sağlam Ş, Üzer A, Apak R. A novel electrochemical sensor based on phosphate-stabilized poly-caffeic acid film in combination with graphene nanosheets for sensitive determination of nitro-aromatic energetic materials. Talanta 2024; 266:125098. [PMID: 37639871 DOI: 10.1016/j.talanta.2023.125098] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2023] [Revised: 07/31/2023] [Accepted: 08/18/2023] [Indexed: 08/31/2023]
Abstract
This work offers a novel approach and sensor electrode for electrocatalytic reduction of nitro-aromatic explosives (NAEs). This sensor was created by combining electrochemically reduced graphene nanosheets (GNSs) -through cyclic voltammetric reduction of a graphene oxide colloidal solution- with phosphate-stabilized poly-caffeic acid (pCAF) film-modified glassy carbon electrode (GCE). The poly-caffeic acid-modified nonconductive electrode was stabilized with a H2PO4-/HPO42- phosphate buffer at pH 7 and made conductive. The novel electrode, called phosphate stabilized-GC/GNSs/pCAF, was characterized by electrochemical methods and scanning electron microscopy (SEM). The sensor exhibited high performance for trinitrotoluene (TNT) detection with a linear response between 50 and 500 μg L- 1 and a detection limit of 6 μg L-1. In addition to TNT, precise determinations of NAEs such as 2,4-dinitrotoluene (2,4-DNT), tetryl (2,4,6-trinitrophenyl methyl nitramine), trinitro phenol (TNP or picric acid; PA), 2,4-dinitrophenol (2,4-DNP), and 4-amino dinitrotoluene (4A-DNT, an aerobic bacterial degradation product of TNT) were made using the developed sensor electrode and DPV technique. Simultaneous quantification of TNT and DNT was performed with the aid of a computational technique known as multiple linear regression (MLR). The optimized electrode was resistant to interference effects. Satisfactory results on real samples were obtained by applying the modified electrode to the determination of TNT, tetryl, and TNP in contaminated soil. The validation of the proposed method was made against a literature LC-MS/MS method. A statistical comparison of the obtained results was provided using F- and Student's t-tests.
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Affiliation(s)
- Aysu Arman
- Institute of Graduate Studies, Chemistry Department, Istanbul University-Cerrahpaşa, Avcılar, Istanbul, Turkey; Engineering Faculty, Chemistry Department, Istanbul University-Cerrahpaşa, Avcılar, Istanbul, Turkey
| | - Şener Sağlam
- Engineering Faculty, Chemistry Department, Istanbul University-Cerrahpaşa, Avcılar, Istanbul, Turkey
| | - Ayşem Üzer
- Engineering Faculty, Chemistry Department, Istanbul University-Cerrahpaşa, Avcılar, Istanbul, Turkey
| | - Reşat Apak
- Engineering Faculty, Chemistry Department, Istanbul University-Cerrahpaşa, Avcılar, Istanbul, Turkey; Turkish Academy of Sciences (TUBA), Bayraktar Neighborhood, Vedat Dalokay St. No:112, 06670, Çankaya, Ankara, Turkey.
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2
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Hay CE, Linden SK, Silvester DS. Electrochemical Behaviour of Organic Explosive Compounds in Ionic Liquids: Towards Discriminate Electrochemical Sensing. ChemElectroChem 2022. [DOI: 10.1002/celc.202200913] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Catherine E. Hay
- School of Molecular and Life Sciences Curtin University GPO Box U1987 Perth 6845 WA Australia
| | - Sarah K. Linden
- School of Molecular and Life Sciences Curtin University GPO Box U1987 Perth 6845 WA Australia
| | - Debbie S. Silvester
- School of Molecular and Life Sciences Curtin University GPO Box U1987 Perth 6845 WA Australia
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3
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Lyu JT, Liang WS, Lv JG. A flow-drop electrochemiluminescent design for portable detection of soil and skin 2,4,6-trinitrotoluene. Microchem J 2022. [DOI: 10.1016/j.microc.2022.108309] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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4
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Dettlaff A, Rycewicz M, Ficek M, Wieloszyńska A, Szala M, Ryl J, Bogdanowicz R. Conductive printable electrodes tuned by boron-doped nanodiamond foil additives for nitroexplosive detection. Mikrochim Acta 2022; 189:270. [PMID: 35789434 PMCID: PMC9255478 DOI: 10.1007/s00604-022-05371-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2022] [Accepted: 06/05/2022] [Indexed: 11/28/2022]
Abstract
An efficient additive manufacturing-based composite material fabrication for electrochemical applications is reported. The composite is composed of commercially available graphene-doped polylactide acid (G-PLA) 3D printouts and surface-functionalized with nanocrystalline boron-doped diamond foil (NDF) additives. The NDFs were synthesized on a tantalum substrate and transferred to the 3D-printout surface at 200 °C. No other electrode activation treatment was necessary. Different configurations of low- and heavy-boron doping NDFs were evaluated. The electrode kinetics was analyzed using electrochemical procedures: cyclic voltammetry and electrochemical impedance spectroscopy. The quasi-reversible electrochemical process was reported in each studied case. The studies allowed confirmation of the CV peak-to-peak separation of 63 mV and remarkably high heterogeneous electron transfer rate constant reaching 6.1 × 10−2 cm s−1 for 10 k ppm [B]/[C] thin NDF fitted topside at the G-PLA electrode. Differential pulse voltammetry was used for effective 2,4,6-trinitrotoluene (TNT) detection at the studied electrodes with a 87 ppb limit of detection, and wide linearity range between peak current density and the analyte concentration (0.064 to 64 ppm of TNT). The reported electrode kinetic differences originate primarily from the boron-dopant concentration in the diamond and the various contents of the non-diamond carbon phase.
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Affiliation(s)
- Anna Dettlaff
- Faculty of Chemistry, Department of Energy Conversion and Storage, Gdańsk University of Technology, 11/12 Narutowicza St, 80-233, Gdańsk, Poland. .,Faculty of Electronics, Telecommunications and Informatics, Department of Metrology and Optoelectronics, Gdańsk University of Technology, 11/12 Narutowicza St, 80-233, Gdańsk, Poland.
| | - Michał Rycewicz
- Faculty of Electronics, Telecommunications and Informatics, Department of Metrology and Optoelectronics, Gdańsk University of Technology, 11/12 Narutowicza St, 80-233, Gdańsk, Poland
| | - Mateusz Ficek
- Faculty of Electronics, Telecommunications and Informatics, Department of Metrology and Optoelectronics, Gdańsk University of Technology, 11/12 Narutowicza St, 80-233, Gdańsk, Poland
| | - Aleksandra Wieloszyńska
- Faculty of Electronics, Telecommunications and Informatics, Department of Metrology and Optoelectronics, Gdańsk University of Technology, 11/12 Narutowicza St, 80-233, Gdańsk, Poland
| | - Mateusz Szala
- Military University of Technology, S. Kaliskiego 2, 00-908, Warsaw, Poland
| | - Jacek Ryl
- Institute of Nanotechnology and Materials Engineering and Advanced Materials Center, Gdańsk University of Technology, 11/12 Narutowicza St, 80-233, Gdańsk, Poland
| | - Robert Bogdanowicz
- Faculty of Electronics, Telecommunications and Informatics, Department of Metrology and Optoelectronics, Gdańsk University of Technology, 11/12 Narutowicza St, 80-233, Gdańsk, Poland
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5
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Uludag N, Serdaroğlu G, Sugumar P, Rajkumar P, Colak N, Ercag E. Synthesis of thiophene derivatives: Substituent effect, antioxidant activity, cyclic voltammetry, molecular docking, DFT, and TD-DFT calculations. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.132607] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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6
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Electrochemical determination of nitroaromatic explosives using glassy carbon/multi walled carbon nanotube/polyethyleneimine electrode coated with gold nanoparticles. Talanta 2022; 238:122990. [PMID: 34857323 DOI: 10.1016/j.talanta.2021.122990] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2021] [Accepted: 10/20/2021] [Indexed: 02/04/2023]
Abstract
The on site/in field detection of explosives has become a rising priority for homeland security and counter-terrorism measures. This work presents the sensitive detection of nitroaromatic explosives using glassy carbon/multi-walled carbon nanotubes/polyethyleneimine (GC/MWCNTs/PEI) electrode coated with gold nanoparticles (AuNPs). MWCNTs and PEI could be well dispersed in ethanol/water solution, giving rise to a thin and homogeneous film on GCE. The GC/MWCNTs/PEI electrode was electrochemically modified with AuNPs and used for the differential pulse voltammetric (DPV) detection of nitroaromatics. The enhanced detection sensitivities were achieved through π-π and charge-transfer (CT) interactions between the electron-deficient nitroaromatic explosives and donor amine groups in PEI to which gold nanoparticles were linked, providing increased analyte affinity toward the modified GCE. Calibration curves of current intensity versus concentration were linear in the range of 0.05-8 mg L-1 for TNT, 0.2-4 mg L-1 for 2,4-dinitrotoluene (DNT), 1-20 mg L-1 for 2,4-dinitrophenol (2,4-DNP), 0.25-10 mg L-1 for picric acid (PA), and 0.05-4 mg L-1 for 2,4,6-trinitrophenyl-N-methylnitramine (tetryl) with detection limits (LOD) of 15 μg L-1, 45 μg L-1, 135 μg L-1, 30 μg L-1, and 12 μg L-1, respectively. The proposed method was successfully applied to the analysis of nitroaromatics in synthetic explosive mixtures and military composite explosives (comp B and octol). The electrochemical method was not affected by possible interferents of electroactive camouflage materials and common soil ions. Method validation was performed against the reference LC-MS method on TNT and PA-contaminated clay soil samples separately.
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Patil VB, Nadagouda MN, Ture SA, Yelamaggad CV, Abbaraju V. Detection of energetic materials via polyaniline and its different modified forms. POLYM ADVAN TECHNOL 2021. [DOI: 10.1002/pat.5458] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Veerabhadragouda B. Patil
- Materials Chemistry Laboratory, Department of Studies and Research in Materials Science Gulbarga University Kalaburagi India
- Faculty of Chemical Technology Institute of Energetic Materials, University of Pardubice Pardubice II Czech Republic
| | | | - Satish A. Ture
- Materials Chemistry Laboratory, Department of Studies and Research in Materials Science Gulbarga University Kalaburagi India
- Department of Studies and Research in Chemistry Gulbarga University Kalaburagi India
| | | | - Venkataraman Abbaraju
- Materials Chemistry Laboratory, Department of Studies and Research in Materials Science Gulbarga University Kalaburagi India
- Department of Studies and Research in Chemistry Gulbarga University Kalaburagi India
- Director Office Premier Explosives Limited Secunderabad Telangana India
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Ture SA, Patil VB, Yelamaggad CV, Martínez‐Máñez R, Abbaraju V. Understanding of mechanistic perspective in sensing of energetic nitro compounds through spectroscopic and electrochemical studies. J Appl Polym Sci 2021. [DOI: 10.1002/app.50776] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Satish A. Ture
- Department of Chemistry Gulbarga University Kalaburagi Karnataka India
- Department of Materials Science Gulbarga University Kalaburagi Karnataka India
| | - Veerabhadragouda B. Patil
- Department of Materials Science Gulbarga University Kalaburagi Karnataka India
- Institute of Energetic Materials, Faculty of Chemical Technology University of Pardubice Czech Republic
| | | | - Ramón Martínez‐Máñez
- Instituto Interuniversitario de Investigación de Reconocimiento Molecular y Desarrollo Tecnológico (IDM) Universitat Politècnica de València, Universitat de València Valencia Spain
- CIBER de Bioingeniería, Biomateriales y Nanomedicina (CIBER‐BBN) Madrid Spain
| | - Venkataraman Abbaraju
- Department of Chemistry Gulbarga University Kalaburagi Karnataka India
- Department of Materials Science Gulbarga University Kalaburagi Karnataka India
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9
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Li X, Ma Y, Zhong XL, Wang LS. Silver sulfide nanoparticles on MWCNTs stabilized by poloxamer: An enhanced electrochemical sensor for high sensitivity detection of 2,4,6-trinitrotoluene. Microchem J 2020. [DOI: 10.1016/j.microc.2020.105488] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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10
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Holubowitch NE, Crabtree C, Budimir Z. Electroanalysis and Spectroelectrochemistry of Nonaromatic Explosives in Acetonitrile Containing Dissolved Oxygen. Anal Chem 2020; 92:11617-11626. [PMID: 32786478 DOI: 10.1021/acs.analchem.0c01174] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
In search of a rapid, low-cost, and solution-phase detection technique for explosives, the (spectro-)electrochemistry of compounds from two major nonaromatic classes, namely nitramines (RDX and HMX) and nitrate esters (pentaerythritol tetranitrate (PETN) and the plastic explosive composite Semtex 1A) in acetonitrile (AN) is reported. In electrochemical screening, 5 μg of explosive material was detectable in 10 s by multicomponent cyclic voltammetric (CV) analysis on unmodified glassy carbon under ubiquitous environmental influences (i.e., trace water and dissolved oxygen). The explosives were identified with high recoveries under a battery of proof-of-concept testing scenarios in various matrices. In AN containing naturally dissolved oxygen (approx. 2 mM), the superoxide radical is co-electrogenerated during analyte reduction. Free superoxide yields prominent signals that the explosives attenuate quantitatively. To gain further insight into the electrochemical transformation mechanism, spectroelectrochemistry was employed to monitor changes in ultraviolet (UV) absorbance during CV and identify transient intermediates and product species, which could be targeted by future chemical sensors. Overlapping UV spectra of multiple species are deconvoluted using a new strategy, spectral regional baselining, for time- and potential-resolved spectroelectrochemical (SEC) analysis. This study shows that dissolved oxygen, hitherto an interferent purposefully removed from the solution, can be exploited advantageously in electrochemical sensing. The work expands our understanding of high-explosive solution-phase chemistry and offers a novel route to signal transduction for the sensing of energetic materials.
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Affiliation(s)
- Nicolas E Holubowitch
- Department of Physical and Environmental Sciences, Texas A&M University-Corpus Christi, 6300 Ocean Drive, Corpus Christi, Texas 78412, United States
| | - Cameo Crabtree
- Department of Physical and Environmental Sciences, Texas A&M University-Corpus Christi, 6300 Ocean Drive, Corpus Christi, Texas 78412, United States
| | - Zachary Budimir
- Department of Physical and Environmental Sciences, Texas A&M University-Corpus Christi, 6300 Ocean Drive, Corpus Christi, Texas 78412, United States
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11
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Leibl N, Duma L, Gonzato C, Haupt K. Polydopamine-based molecularly imprinted thin films for electro-chemical sensing of nitro-explosives in aqueous solutions. Bioelectrochemistry 2020; 135:107541. [PMID: 32388439 DOI: 10.1016/j.bioelechem.2020.107541] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2020] [Revised: 04/21/2020] [Accepted: 04/27/2020] [Indexed: 02/06/2023]
Abstract
A sensitive electrochemical sensor was developed for the detection of nitro-explosives in aqueous solutions based on thin molecularly imprinted polydopamine films. Dopamine was identified in silico, based on DFT (density functional theory) calculations with the ωB97X-D/6-31G* basis set, as the best functional monomer and electropolymerized via cyclic voltammetry (CV) in the presence of carboxylic acid-based structural analogues ('dummy' templates) for two model nitro-explosives: TNT (2,4,6-trinitrotoluene) and RDX (Research Department eXplosive, 1,3,5-trinitroperhydro-1,3,5-triazine). This approach afforded a homogenous coverage of gold electrodes with imprinted films of tunable thickness. The electropolymerized molecularly imprinted polydopamine films allowed for a 105-fold sensitivity improvement over a bare gold electrode based on tracking the redox peaks of the targets by CV. This improved sensitivity is ascribed to the ability of the MIP to concentrate its target in proximity to the transduction element. The MIP films showed reproducible binding in phosphate buffer (10 mM, pH 7.4), with a dynamic range from 0.1 nM to 10 nM for both TNT and RDX and an increased selectivity over closely related structural analogues.
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Affiliation(s)
- Nadja Leibl
- Sorbonne Université, Université de Technologie de Compiègne, CNRS Enzyme and Cell Engineering Laboratory, Rue Roger Couttolenc, CS 60319, 60203 Compiègne Cedex, France
| | - Luminita Duma
- Sorbonne Université, Université de Technologie de Compiègne, CNRS Enzyme and Cell Engineering Laboratory, Rue Roger Couttolenc, CS 60319, 60203 Compiègne Cedex, France
| | - Carlo Gonzato
- Sorbonne Université, Université de Technologie de Compiègne, CNRS Enzyme and Cell Engineering Laboratory, Rue Roger Couttolenc, CS 60319, 60203 Compiègne Cedex, France.
| | - Karsten Haupt
- Sorbonne Université, Université de Technologie de Compiègne, CNRS Enzyme and Cell Engineering Laboratory, Rue Roger Couttolenc, CS 60319, 60203 Compiègne Cedex, France.
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12
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Molecularly imprinted polymer nano-sphere/multi-walled carbon nanotube coated glassy carbon electrode as an ultra-sensitive voltammetric sensor for picomolar level determination of RDX. Talanta 2019; 194:415-421. [DOI: 10.1016/j.talanta.2018.10.040] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2018] [Revised: 10/08/2018] [Accepted: 10/10/2018] [Indexed: 11/20/2022]
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13
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Sağlam Ş, Üzer A, Erçağ E, Apak R. 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. Anal Chem 2018; 90:7364-7370. [DOI: 10.1021/acs.analchem.8b00715] [Citation(s) in RCA: 56] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Şener Sağlam
- Faculty of Engineering, Chemistry Department, Istanbul University, 34320 Istanbul, Turkey
| | - Ayşem Üzer
- Faculty of Engineering, Chemistry Department, Istanbul University, 34320 Istanbul, Turkey
| | - Erol Erçağ
- Aytar Cad., Fecri Ebcioglu Sok., No. 6/8, Levent, 34340 Istanbul, Turkey
| | - Reşat Apak
- Faculty of Engineering, Chemistry Department, Istanbul University, 34320 Istanbul, Turkey
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Yu HA, DeTata DA, Lewis SW, Silvester DS. Recent developments in the electrochemical detection of explosives: Towards field-deployable devices for forensic science. Trends Analyt Chem 2017. [DOI: 10.1016/j.trac.2017.10.007] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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15
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Erickson JS, Shriver-Lake LC, Zabetakis D, Stenger DA, Trammell SA. A Simple and Inexpensive Electrochemical Assay for the Identification of Nitrogen Containing Explosives in the Field. SENSORS 2017; 17:s17081769. [PMID: 28767088 PMCID: PMC5579490 DOI: 10.3390/s17081769] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/11/2017] [Revised: 07/27/2017] [Accepted: 07/31/2017] [Indexed: 01/27/2023]
Abstract
We report a simple and inexpensive electrochemical assay using a custom built hand-held potentiostat for the identification of explosives. The assay is based on a wipe test and is specifically designed for use in the field. The prototype instrument designed to run the assay is capable of performing time-resolved electrochemical measurements including cyclic square wave voltammetry using an embedded microcontroller with parts costing roughly $250 USD. We generated an example library of cyclic square wave voltammograms of 12 compounds including 10 nitroaromatics, a nitramine (RDX), and a nitrate ester (nitroglycine), and designed a simple discrimination algorithm based on this library data for identification.
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Affiliation(s)
- Jeffrey S Erickson
- Center for Biomolecular Science and Engineering, Naval Research Laboratory, Washington, DC 20375, USA.
| | - Lisa C Shriver-Lake
- Center for Biomolecular Science and Engineering, Naval Research Laboratory, Washington, DC 20375, USA.
| | - Daniel Zabetakis
- Center for Biomolecular Science and Engineering, Naval Research Laboratory, Washington, DC 20375, USA.
| | - David A Stenger
- Center for Biomolecular Science and Engineering, Naval Research Laboratory, Washington, DC 20375, USA.
| | - Scott A Trammell
- Center for Biomolecular Science and Engineering, Naval Research Laboratory, Washington, DC 20375, USA.
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Shah A, Akhtar M, Aftab S, Shah AH, Kraatz HB. Gold copper alloy nanoparticles (Au-Cu NPs) modified electrode as an enhanced electrochemical sensing platform for the detection of persistent toxic organic pollutants. Electrochim Acta 2017. [DOI: 10.1016/j.electacta.2017.04.166] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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17
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Guven B, Eryilmaz M, Üzer A, Boyaci IH, Tamer U, Apak R. Surface-enhanced Raman spectroscopy combined with gold nanorods for the simultaneous quantification of nitramine energetic materials. RSC Adv 2017. [DOI: 10.1039/c7ra05844f] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A nanosensing method based on surface-enhanced Raman spectroscopy was proposed for simultaneous quantification of nitramine compounds, HMX and RDX.
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Affiliation(s)
- Burcu Guven
- Department of Food Engineering
- Faculty of Engineering
- Hacettepe University
- Ankara
- Turkey
| | - Merve Eryilmaz
- Department of Analytical Chemistry
- Faculty of Pharmacy
- Gazi University
- Ankara
- Turkey
| | - Ayşem Üzer
- Department of Chemistry
- Faculty of Engineering
- Istanbul University
- Istanbul
- Turkey
| | - Ismail Hakki Boyaci
- Department of Food Engineering
- Faculty of Engineering
- Hacettepe University
- Ankara
- Turkey
| | - Uğur Tamer
- Department of Analytical Chemistry
- Faculty of Pharmacy
- Gazi University
- Ankara
- Turkey
| | - Reşat Apak
- Department of Chemistry
- Faculty of Engineering
- Istanbul University
- Istanbul
- Turkey
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19
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Application of CdSe quantum dots for the direct detection of TNT. Forensic Sci Int 2016; 259:101-5. [DOI: 10.1016/j.forsciint.2015.12.028] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2015] [Revised: 11/30/2015] [Accepted: 12/17/2015] [Indexed: 11/19/2022]
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20
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ANILANMERT B, AYDIN M, APAK R, AVCI GY, CENGIZ S. A Fast Liquid Chromatography Tandem Mass Spectrometric Analysis of PETN (Pentaerythritol Tetranitrate), RDX (3,5-Trinitro-1,3,5-triazacyclohexane) and HMX (Octahydro-1,3,5,7-tetranitro-1,3,5,7-tetrazocine) in Soil, Utilizing a Simple Ultrasonic-Assisted Extraction with Minimum Solvent. ANAL SCI 2016; 32:611-6. [DOI: 10.2116/analsci.32.611] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
| | - Muhammet AYDIN
- Istanbul University Faculty of Medicine, Department of Microbiology
| | - Resat APAK
- Istanbul University Faculty of Engineering, Department of Analytical Chemistry
| | | | - Salih CENGIZ
- Istanbul University Institute of Forensic Sciences
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Chen W, Hou K, Hua L, Li H. Dopant-assisted reactive low temperature plasma probe for sensitive and specific detection of explosives. Analyst 2015; 140:6025-30. [PMID: 26191543 DOI: 10.1039/c5an00816f] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
A dopant-assisted reactive low temperature plasma (DARLTP) probe was developed for sensitive and specific detection of explosives by a miniature rectilinear ion trap mass spectrometer. The DARLTP probe was fabricated using a T-shaped quartz tube. The dopant gas was introduced into the plasma stream through a side-tube. Using CH2Cl2 doped wet air as the dopant gas, the detection sensitivities were improved about 4-fold (RDX), 4-fold (PETN), and 3-fold (tetryl) compared with those obtained using the conventional LTP. Furthermore, the formation of [M + (35)Cl](-) and [M + (37)Cl](-) for these explosives enhanced the specificity for their identification. Additionally, the quantities of fragment ions of tetryl and adduct ions such as [RDX + NO2](-) and [PETN + NO2](-) were dramatically reduced, which simplified the mass spectra and avoided the overlap of mass peaks for different explosives. The sensitivity improvement may be attributed to the increased intensity of reactant ion [HNO3 + NO3](-), which was enhanced 4-fold after the introduction of dopant gas. The limits of detection (LODs) for RDX, tetryl, and PETN were down to 3, 6, and 10 pg, respectively. Finally, an explosive mixture was successfully analyzed, demonstrating the potential of the DARLTP probe for qualitative and quantitative analysis of complicated explosives.
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Affiliation(s)
- Wendong Chen
- Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China.
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22
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Sağlam Ş, Üzer A, Tekdemir Y, Erçağ E, Apak R. Electrochemical sensor for nitroaromatic type energetic materials using gold nanoparticles/poly(o-phenylenediamine–aniline) film modified glassy carbon electrode. Talanta 2015; 139:181-8. [DOI: 10.1016/j.talanta.2015.02.059] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2014] [Revised: 02/23/2015] [Accepted: 02/28/2015] [Indexed: 11/28/2022]
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Čapka L, Večeřa Z, Mikuška P, Šesták J, Kahle V, Bumbová A. A portable device for fast analysis of explosives in the environment. J Chromatogr A 2015; 1388:167-73. [DOI: 10.1016/j.chroma.2015.02.041] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2014] [Revised: 01/16/2015] [Accepted: 02/16/2015] [Indexed: 11/26/2022]
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