TY  - JOUR
AU  - Đurović, Ana
AU  - Stojanović, Zorica
AU  - Kravić, Snežana
AU  - Suturović, Zvonimir
AU  - Brezo, Tanja
AU  - Grahovac, Nada
AU  - Milanović, Spasenija D.
PY  - 2015
UR  - http://fiver.ifvcns.rs/handle/123456789/1496
AB  - This study compares different methods for the removal of oxygen from the solution prior to the chronopotentiometric determination of the insecticide imidacloprid on glassy carbon electrode. The research included the application of the chemical method involving addition of sulfite ion, and the physical method of purging the sample with nitrogen stream, as well as their combination. By comparing analytical signals of imidacloprid, chemical method showed almost the same efficiency as conventional physical method, while the best reproducibility was achieved by applying chemical method with addition of the saturated sodium sulfite solution. The method is very simple and can be applied for deoxygenation of the solution prior to the chronopotentiometric analysis. The application of the chemical deoxygenation significantly shortened duration of the chronopotentiometric analysis of imidacloprid from approximately 15 min to 1 min.
AB  - U ovoj studiji poređene su različite metode za uklanjanje rastvorenog kiseonika iz rastvora pre hronopotenciometrijskog određivanja insekticida imidakloprida na elektrodi od staklastog ugljenika. Istraživanje je obuhvatalo primenu hemijske metode dodatkom sulfitnog jona i fizičke metode provođenje struje azota kroz uzorak u trajanju od 5, 10 i 15 min, kao i njihovu kombinaciju. Poređenjem analitičkih signala imidakloprida, hemijska metoda pokazala je skoro istu efikasnost kao i konvencionalna fizička metoda, dok je najbolja reproduktivnost ostvarena primenom hemijske metode uz dodatak 0,8 cm3 zasićenog rastvora natrijum sulfita. Metoda je veoma jednostavna i može se primeniti za uklanjanje kiseonika iz rastvora pre izvođenja hronopotenciometrijske analize. Primenom hemijske deoksigenacije značajno se skraćuje trajanje hronopotenciometrijske analize imidakloprida sa 15 min na 1 min.
PB  - Univerzitet u Novom Sadu - Tehnološki fakultet, Novi Sad
T2  - Acta Periodica Technologica
T1  - A comparison of different methods to remove dissolved oxygen: Application to the electrochemical determination of imidacloprid
T1  - Poređenje različitih metoda za uklanjanje rastvorenog kiseonika - primena pri elektrohemijskom određivanju imidakloprida
EP  - 155
SP  - 149
VL  - 46
DO  - 10.2298/APT1546149D
ER  - 

@article{
author = "Đurović, Ana and Stojanović, Zorica and Kravić, Snežana and Suturović, Zvonimir and Brezo, Tanja and Grahovac, Nada and Milanović, Spasenija D.",
year = "2015",
abstract = "This study compares different methods for the removal of oxygen from the solution prior to the chronopotentiometric determination of the insecticide imidacloprid on glassy carbon electrode. The research included the application of the chemical method involving addition of sulfite ion, and the physical method of purging the sample with nitrogen stream, as well as their combination. By comparing analytical signals of imidacloprid, chemical method showed almost the same efficiency as conventional physical method, while the best reproducibility was achieved by applying chemical method with addition of the saturated sodium sulfite solution. The method is very simple and can be applied for deoxygenation of the solution prior to the chronopotentiometric analysis. The application of the chemical deoxygenation significantly shortened duration of the chronopotentiometric analysis of imidacloprid from approximately 15 min to 1 min., U ovoj studiji poređene su različite metode za uklanjanje rastvorenog kiseonika iz rastvora pre hronopotenciometrijskog određivanja insekticida imidakloprida na elektrodi od staklastog ugljenika. Istraživanje je obuhvatalo primenu hemijske metode dodatkom sulfitnog jona i fizičke metode provođenje struje azota kroz uzorak u trajanju od 5, 10 i 15 min, kao i njihovu kombinaciju. Poređenjem analitičkih signala imidakloprida, hemijska metoda pokazala je skoro istu efikasnost kao i konvencionalna fizička metoda, dok je najbolja reproduktivnost ostvarena primenom hemijske metode uz dodatak 0,8 cm3 zasićenog rastvora natrijum sulfita. Metoda je veoma jednostavna i može se primeniti za uklanjanje kiseonika iz rastvora pre izvođenja hronopotenciometrijske analize. Primenom hemijske deoksigenacije značajno se skraćuje trajanje hronopotenciometrijske analize imidakloprida sa 15 min na 1 min.",
publisher = "Univerzitet u Novom Sadu - Tehnološki fakultet, Novi Sad",
journal = "Acta Periodica Technologica",
title = "A comparison of different methods to remove dissolved oxygen: Application to the electrochemical determination of imidacloprid, Poređenje različitih metoda za uklanjanje rastvorenog kiseonika - primena pri elektrohemijskom određivanju imidakloprida",
pages = "155-149",
volume = "46",
doi = "10.2298/APT1546149D"
}

Đurović, A., Stojanović, Z., Kravić, S., Suturović, Z., Brezo, T., Grahovac, N.,& Milanović, S. D.. (2015). A comparison of different methods to remove dissolved oxygen: Application to the electrochemical determination of imidacloprid. in Acta Periodica Technologica
Univerzitet u Novom Sadu - Tehnološki fakultet, Novi Sad., 46, 149-155.
https://doi.org/10.2298/APT1546149D

Đurović A, Stojanović Z, Kravić S, Suturović Z, Brezo T, Grahovac N, Milanović SD. A comparison of different methods to remove dissolved oxygen: Application to the electrochemical determination of imidacloprid. in Acta Periodica Technologica. 2015;46:149-155.
doi:10.2298/APT1546149D .

Đurović, Ana, Stojanović, Zorica, Kravić, Snežana, Suturović, Zvonimir, Brezo, Tanja, Grahovac, Nada, Milanović, Spasenija D., "A comparison of different methods to remove dissolved oxygen: Application to the electrochemical determination of imidacloprid" in Acta Periodica Technologica, 46 (2015):149-155,
https://doi.org/10.2298/APT1546149D . .

TY  - CONF
AU  - Đurović, Ana
AU  - Stojanović, Zorica
AU  - Grahovac, Nada
AU  - Kravić, Snežana
AU  - Suturović, Zvonimir
AU  - Švarc-Gajić, Jaroslava
AU  - Milanović, Spasenija
PY  - 2014
UR  - http://fiver.ifvcns.rs/handle/123456789/3307
AB  - In this work deaeration methods were investigated for chronopotentiometric determination of pesticide
imidacloprid [1-(6-chloro-3-pyridyimethyl)-N-nitroimidazolidin-2-ylideneamine] on glassy carbon
electrode. As a supporting electrolyte, a Britton-Robinson buffer was used. All investigations were
carried out in model systems. Cathodic peak of imidacloprid could not be registered only in BrittonRobinson buffer, due to electrochemical reduction of dissolved oxygen. For this reason, it was
necessary to investigate different deaeration methods for removing oxygen from the solution. Within
this, deaerations by various reductants and by passing a nitrogen stream were compared. Investigated
reductants were sodium sulfite, ascorbic acid, oxalic acid, potassium bromide and sodium bromide.
Combinations of a certain reductant and nitrogen were compared as well. Addition of a saturated
solution of sodium sulfite directly in the tested solution proved as the best deaeration method. This
method provided fast deaeration step as it took less than a minute for completely removing the
oxygen. An optimal concentration of the solution of sodium sulfite was also investigated.
Concentrations of sodium sulfite were tested in the range of 0.6 g/idm* to 230 gidm?. Considering the
height of the analytical signal and its reproducibility, concentration of 8.8 gldm? showed as optimal.
This method could be applied for the determination of imidacloprid in commercial formulations and
some real samples.
PB  - Novi Sad : University of Novi Sad, Institute of Food Technology
C3  - Proceedings, 2nd International Congress, Food Technology, Quality and Safety, 28-30 October 2014, Novi Sad, Serbia
T1  - Deaeration method for imidacloprid determination on glassy carbon electrode.
EP  - 175
SP  - 171
UR  - https://hdl.handle.net/21.15107/rcub_fiver_3307
ER  - 

@conference{
author = "Đurović, Ana and Stojanović, Zorica and Grahovac, Nada and Kravić, Snežana and Suturović, Zvonimir and Švarc-Gajić, Jaroslava and Milanović, Spasenija",
year = "2014",
abstract = "In this work deaeration methods were investigated for chronopotentiometric determination of pesticide
imidacloprid [1-(6-chloro-3-pyridyimethyl)-N-nitroimidazolidin-2-ylideneamine] on glassy carbon
electrode. As a supporting electrolyte, a Britton-Robinson buffer was used. All investigations were
carried out in model systems. Cathodic peak of imidacloprid could not be registered only in BrittonRobinson buffer, due to electrochemical reduction of dissolved oxygen. For this reason, it was
necessary to investigate different deaeration methods for removing oxygen from the solution. Within
this, deaerations by various reductants and by passing a nitrogen stream were compared. Investigated
reductants were sodium sulfite, ascorbic acid, oxalic acid, potassium bromide and sodium bromide.
Combinations of a certain reductant and nitrogen were compared as well. Addition of a saturated
solution of sodium sulfite directly in the tested solution proved as the best deaeration method. This
method provided fast deaeration step as it took less than a minute for completely removing the
oxygen. An optimal concentration of the solution of sodium sulfite was also investigated.
Concentrations of sodium sulfite were tested in the range of 0.6 g/idm* to 230 gidm?. Considering the
height of the analytical signal and its reproducibility, concentration of 8.8 gldm? showed as optimal.
This method could be applied for the determination of imidacloprid in commercial formulations and
some real samples.",
publisher = "Novi Sad : University of Novi Sad, Institute of Food Technology",
journal = "Proceedings, 2nd International Congress, Food Technology, Quality and Safety, 28-30 October 2014, Novi Sad, Serbia",
title = "Deaeration method for imidacloprid determination on glassy carbon electrode.",
pages = "175-171",
url = "https://hdl.handle.net/21.15107/rcub_fiver_3307"
}

Đurović, A., Stojanović, Z., Grahovac, N., Kravić, S., Suturović, Z., Švarc-Gajić, J.,& Milanović, S.. (2014). Deaeration method for imidacloprid determination on glassy carbon electrode.. in Proceedings, 2nd International Congress, Food Technology, Quality and Safety, 28-30 October 2014, Novi Sad, Serbia
Novi Sad : University of Novi Sad, Institute of Food Technology., 171-175.
https://hdl.handle.net/21.15107/rcub_fiver_3307

Đurović A, Stojanović Z, Grahovac N, Kravić S, Suturović Z, Švarc-Gajić J, Milanović S. Deaeration method for imidacloprid determination on glassy carbon electrode.. in Proceedings, 2nd International Congress, Food Technology, Quality and Safety, 28-30 October 2014, Novi Sad, Serbia. 2014;:171-175.
https://hdl.handle.net/21.15107/rcub_fiver_3307 .

Đurović, Ana, Stojanović, Zorica, Grahovac, Nada, Kravić, Snežana, Suturović, Zvonimir, Švarc-Gajić, Jaroslava, Milanović, Spasenija, "Deaeration method for imidacloprid determination on glassy carbon electrode." in Proceedings, 2nd International Congress, Food Technology, Quality and Safety, 28-30 October 2014, Novi Sad, Serbia (2014):171-175,
https://hdl.handle.net/21.15107/rcub_fiver_3307 .