Deaeration method for imidacloprid determination on glassy carbon electrode.
Аутори
Đurović, AnaStojanović, Zorica
Grahovac, Nada
Kravić, Snežana
Suturović, Zvonimir
Švarc-Gajić, Jaroslava
Milanović, Spasenija
Конференцијски прилог (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт
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
me...thod 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.
Кључне речи:
imidacloprid / glassy carbon / deaeration methodИзвор:
Proceedings, 2nd International Congress, Food Technology, Quality and Safety, 28-30 October 2014, Novi Sad, Serbia, 2014, 171-175Издавач:
- Novi Sad : University of Novi Sad, Institute of Food Technology
Финансирање / пројекти:
- Унапређење и развој хигијенских и технолошких поступака у производњи намирница животињског порекла у циљу добијања квалитетних и безбедних производа конкурентних на светском тржишту (RS-MESTD-Integrated and Interdisciplinary Research (IIR or III)-46009)
Колекције
Институција/група
FiVeRTY - 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 .