The Galvanostatic Reduction on Modified Platinum Electrode and Determination of Trinitrotoluene in Neutral Solution
Authors
Marinović, Vedrana M.Marinović, Sanja
Jovanović, M.
Jovanovic, J.
Nesic, G.
Stojanović, Milovan
Article (Published version)
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The study of the electrochemical reduction on acetonitrile modified platinum electrode and determination of trinitrotoluene (TNT) in neutral solution by simple galvanostatic technique is presented here. The obtained potential-time responses on the applied constant cathodic current pulses showed two potential transitions before achieving the steady-states, referring to the multi-step reduction process of nitro groups in TNT molecule. The calibration curves of the dependence of the square root of the first transition time (tau(0.5)) on the TNT concentration were linear in the ranges 4.4 - 303.8 mu M and 0.09 - 4.40 mu M for applied constant current of 0.1 mA. The detection limit was 0.09 mu M. The method was tested in the river water. The results indicated the sensitivity of the galvanostatic method for TNT determination in the environmental samples. From the first transition on the E-t curves the characteristics important for the understanding the mechanism of the reduction process were... obtained. It was found that four electrons are involved in the reduction process of the first nitro group, indicating that the reduction product in a neutral electrolyte is hydroxylamine.
Keywords:
trinitrotoluene detection / galvanostatic technique / acetonitrile modified platinum electrodeSource:
International Journal of Electrochemical Science, 2013, 8, 2, 1986-1998Publisher:
- Esg, Belgrade
Funding / projects:
- Functional, Functionalized and Advanced Nanomaterials (RS-MESTD-Integrated and Interdisciplinary Research (IIR or III)-45005)
- Nanostructured Functional and Composite Materials in Catalytic and Sorption Processes (RS-MESTD-Integrated and Interdisciplinary Research (IIR or III)-45001)
Institution/Community
Tehnološko-metalurški fakultetTY - JOUR AU - Marinović, Vedrana M. AU - Marinović, Sanja AU - Jovanović, M. AU - Jovanovic, J. AU - Nesic, G. AU - Stojanović, Milovan PY - 2013 UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5723 AB - The study of the electrochemical reduction on acetonitrile modified platinum electrode and determination of trinitrotoluene (TNT) in neutral solution by simple galvanostatic technique is presented here. The obtained potential-time responses on the applied constant cathodic current pulses showed two potential transitions before achieving the steady-states, referring to the multi-step reduction process of nitro groups in TNT molecule. The calibration curves of the dependence of the square root of the first transition time (tau(0.5)) on the TNT concentration were linear in the ranges 4.4 - 303.8 mu M and 0.09 - 4.40 mu M for applied constant current of 0.1 mA. The detection limit was 0.09 mu M. The method was tested in the river water. The results indicated the sensitivity of the galvanostatic method for TNT determination in the environmental samples. From the first transition on the E-t curves the characteristics important for the understanding the mechanism of the reduction process were obtained. It was found that four electrons are involved in the reduction process of the first nitro group, indicating that the reduction product in a neutral electrolyte is hydroxylamine. PB - Esg, Belgrade T2 - International Journal of Electrochemical Science T1 - The Galvanostatic Reduction on Modified Platinum Electrode and Determination of Trinitrotoluene in Neutral Solution EP - 1998 IS - 2 SP - 1986 VL - 8 UR - https://hdl.handle.net/21.15107/rcub_dais_364 ER -
@article{ author = "Marinović, Vedrana M. and Marinović, Sanja and Jovanović, M. and Jovanovic, J. and Nesic, G. and Stojanović, Milovan", year = "2013", abstract = "The study of the electrochemical reduction on acetonitrile modified platinum electrode and determination of trinitrotoluene (TNT) in neutral solution by simple galvanostatic technique is presented here. The obtained potential-time responses on the applied constant cathodic current pulses showed two potential transitions before achieving the steady-states, referring to the multi-step reduction process of nitro groups in TNT molecule. The calibration curves of the dependence of the square root of the first transition time (tau(0.5)) on the TNT concentration were linear in the ranges 4.4 - 303.8 mu M and 0.09 - 4.40 mu M for applied constant current of 0.1 mA. The detection limit was 0.09 mu M. The method was tested in the river water. The results indicated the sensitivity of the galvanostatic method for TNT determination in the environmental samples. From the first transition on the E-t curves the characteristics important for the understanding the mechanism of the reduction process were obtained. It was found that four electrons are involved in the reduction process of the first nitro group, indicating that the reduction product in a neutral electrolyte is hydroxylamine.", publisher = "Esg, Belgrade", journal = "International Journal of Electrochemical Science", title = "The Galvanostatic Reduction on Modified Platinum Electrode and Determination of Trinitrotoluene in Neutral Solution", pages = "1998-1986", number = "2", volume = "8", url = "https://hdl.handle.net/21.15107/rcub_dais_364" }
Marinović, V. M., Marinović, S., Jovanović, M., Jovanovic, J., Nesic, G.,& Stojanović, M.. (2013). The Galvanostatic Reduction on Modified Platinum Electrode and Determination of Trinitrotoluene in Neutral Solution. in International Journal of Electrochemical Science Esg, Belgrade., 8(2), 1986-1998. https://hdl.handle.net/21.15107/rcub_dais_364
Marinović VM, Marinović S, Jovanović M, Jovanovic J, Nesic G, Stojanović M. The Galvanostatic Reduction on Modified Platinum Electrode and Determination of Trinitrotoluene in Neutral Solution. in International Journal of Electrochemical Science. 2013;8(2):1986-1998. https://hdl.handle.net/21.15107/rcub_dais_364 .
Marinović, Vedrana M., Marinović, Sanja, Jovanović, M., Jovanovic, J., Nesic, G., Stojanović, Milovan, "The Galvanostatic Reduction on Modified Platinum Electrode and Determination of Trinitrotoluene in Neutral Solution" in International Journal of Electrochemical Science, 8, no. 2 (2013):1986-1998, https://hdl.handle.net/21.15107/rcub_dais_364 .