TY  - CONF
AU  - Stojanović, Z.
AU  - Đurović, A.
AU  - Kravić, S.
AU  - Suturović, Z.
AU  - Brezo, T.
AU  - Richtera, I
AU  - Bytešníková, Z
AU  - Grahovac, Nada
PY  - 2019
UR  - http://fiver.ifvcns.rs/handle/123456789/3704
AB  - Catechin is a flavonoid compound with polyphenolic structure naturally occurring in plants, fruits, tea, red
wine and cacao products. Many beneficial effects are associated with catechin consumption such as
antioxidant, anticarcinogenic, anti-inflammatory, antiatherogenic, antibacterial and antiviral activity.
Determination of catechin is typically based on the use of high-performance liquid chromatography, but also
methods such as spectrophotometry and capillary electrophoresis are reported.
In this work we investigated the use of different modifications of a carbon paste electrode (CPE) for
voltammetric determination of catechin. The reason for introducing a modifier into the carbon paste was to
increase the sensitivity of the voltammeircic techniques, due to the catalytic effect of the modifier on the
electrode processes. Multi-walled carbon nanotubes (MWCNTs), antimony(Ill) oxide and bismuth
nanoparticles are investigated as bulk modifiers for preparation of CPE with concentration of 5% (w/w).
Electroanalytical measurements are performed in 0.1 M phosphate buffer pH 7.0 using cyclic voltammetry
and square wave voltammetry, in the concentration range from 1 to 20 mg/dm* of catechin.
Two oxidation peaks of catechin are observed for all studied modified CPEs and bare CPE, with significantly
higher intensity of the first peak. The results also showed improvement of sensitivity by using the modified
CPEs in comparison to unmodified CPE. The application of MWCNTs as a modifier contributed to the
highest sensitivity for catechin determination in relation to the other modifiers. These preliminary results
show that MWCNTs modified CPE can be used as a very sensitive sensor for catechin determination in real
samples.
PB  - Novi Sad : Univerzitet u Novom Sadu, Tehnološki fakultet
C3  - Book of Proceedings, 21st Danube-Kris-Mures-Tisza (DKMT) Euroregional Conference on Environment and Health, University of Novi Sad, Faculty of Technology, Novi Sad, Serbia.
T1  - Application of the modified carbon paste electrodes for determination of catechin
EP  - 129
SP  - 126
UR  - https://hdl.handle.net/21.15107/rcub_fiver_3704
ER  - 

@conference{
author = "Stojanović, Z. and Đurović, A. and Kravić, S. and Suturović, Z. and Brezo, T. and Richtera, I and Bytešníková, Z and Grahovac, Nada",
year = "2019",
abstract = "Catechin is a flavonoid compound with polyphenolic structure naturally occurring in plants, fruits, tea, red
wine and cacao products. Many beneficial effects are associated with catechin consumption such as
antioxidant, anticarcinogenic, anti-inflammatory, antiatherogenic, antibacterial and antiviral activity.
Determination of catechin is typically based on the use of high-performance liquid chromatography, but also
methods such as spectrophotometry and capillary electrophoresis are reported.
In this work we investigated the use of different modifications of a carbon paste electrode (CPE) for
voltammetric determination of catechin. The reason for introducing a modifier into the carbon paste was to
increase the sensitivity of the voltammeircic techniques, due to the catalytic effect of the modifier on the
electrode processes. Multi-walled carbon nanotubes (MWCNTs), antimony(Ill) oxide and bismuth
nanoparticles are investigated as bulk modifiers for preparation of CPE with concentration of 5% (w/w).
Electroanalytical measurements are performed in 0.1 M phosphate buffer pH 7.0 using cyclic voltammetry
and square wave voltammetry, in the concentration range from 1 to 20 mg/dm* of catechin.
Two oxidation peaks of catechin are observed for all studied modified CPEs and bare CPE, with significantly
higher intensity of the first peak. The results also showed improvement of sensitivity by using the modified
CPEs in comparison to unmodified CPE. The application of MWCNTs as a modifier contributed to the
highest sensitivity for catechin determination in relation to the other modifiers. These preliminary results
show that MWCNTs modified CPE can be used as a very sensitive sensor for catechin determination in real
samples.",
publisher = "Novi Sad : Univerzitet u Novom Sadu, Tehnološki fakultet",
journal = "Book of Proceedings, 21st Danube-Kris-Mures-Tisza (DKMT) Euroregional Conference on Environment and Health, University of Novi Sad, Faculty of Technology, Novi Sad, Serbia.",
title = "Application of the modified carbon paste electrodes for determination of catechin",
pages = "129-126",
url = "https://hdl.handle.net/21.15107/rcub_fiver_3704"
}

Stojanović, Z., Đurović, A., Kravić, S., Suturović, Z., Brezo, T., Richtera, I., Bytešníková, Z.,& Grahovac, N.. (2019). Application of the modified carbon paste electrodes for determination of catechin. in Book of Proceedings, 21st Danube-Kris-Mures-Tisza (DKMT) Euroregional Conference on Environment and Health, University of Novi Sad, Faculty of Technology, Novi Sad, Serbia.
Novi Sad : Univerzitet u Novom Sadu, Tehnološki fakultet., 126-129.
https://hdl.handle.net/21.15107/rcub_fiver_3704

Stojanović Z, Đurović A, Kravić S, Suturović Z, Brezo T, Richtera I, Bytešníková Z, Grahovac N. Application of the modified carbon paste electrodes for determination of catechin. in Book of Proceedings, 21st Danube-Kris-Mures-Tisza (DKMT) Euroregional Conference on Environment and Health, University of Novi Sad, Faculty of Technology, Novi Sad, Serbia.. 2019;:126-129.
https://hdl.handle.net/21.15107/rcub_fiver_3704 .

Stojanović, Z., Đurović, A., Kravić, S., Suturović, Z., Brezo, T., Richtera, I, Bytešníková, Z, Grahovac, Nada, "Application of the modified carbon paste electrodes for determination of catechin" in Book of Proceedings, 21st Danube-Kris-Mures-Tisza (DKMT) Euroregional Conference on Environment and Health, University of Novi Sad, Faculty of Technology, Novi Sad, Serbia. (2019):126-129,
https://hdl.handle.net/21.15107/rcub_fiver_3704 .

TY  - CONF
AU  - Stojanović, Z.
AU  - Kravić, S.
AU  - Đurović, A.
AU  - Grahovac, Nada
AU  - Romanić, R
AU  - Hladni, Nada
AU  - Marjanović-Jeromela, Ana
PY  - 2018
UR  - http://fiver.ifvcns.rs/handle/123456789/3679
AB  - Sunflower seed cake is remaining after isolation of oil from sunflower seeds and practically
represents a waste from production of cold pressed sunflower oils. This waste product is
consider as a viable potential source of various natural compounds and can be exploited for
the production of new products and isolation of valuable substances such as biologically
active compounds and nutraceuticals. In addition, isolation of biologically active substances
from food waste represents the way for recycling and may be economically attractive as well.
Flavonoids represent a group of polyphenol compounds with a high antioxidant power. These
phytochemicals are known to reduce many chronic diseases such as cardiovascular diseases,
heart diseases, diabetes, obesity and certain cancer [1]. In this work we investigated the
flavonoids content in seven sunflower seed cakes coming from cold pressed oil production.
Flavonoids are extracted by using 80% ethanol and ultrasound-assisted extraction at 30°C for
10 minutes. Total flavonoid content is determined by a colorimetric method [2]. The results
showed that sunflower seed cakes contained significant amounts of total flavonoids. The total
flavonoids content is found to be in the range from 12.3 to 24.6 mg of catechin equivalent/g.
The results proved that sunflower seed cakes obtained from cold pressed oil production
represent valuable by-product and can be used as a raw material for isolation of bioactive
flavonoids which could be further applied for development of various functional foods.
PB  - University of Szeged, H-6720 Szeged, Dugonics tér 13, Hungary
C3  - 24th International Symposium on Analytical and Environmental Problems, Szeged, Hungary
T1  - Sunflower seed cake as a potential bioresource for isolation of flavonoids
EP  - 213
SP  - 213
UR  - https://hdl.handle.net/21.15107/rcub_fiver_3679
ER  - 

@conference{
author = "Stojanović, Z. and Kravić, S. and Đurović, A. and Grahovac, Nada and Romanić, R and Hladni, Nada and Marjanović-Jeromela, Ana",
year = "2018",
abstract = "Sunflower seed cake is remaining after isolation of oil from sunflower seeds and practically
represents a waste from production of cold pressed sunflower oils. This waste product is
consider as a viable potential source of various natural compounds and can be exploited for
the production of new products and isolation of valuable substances such as biologically
active compounds and nutraceuticals. In addition, isolation of biologically active substances
from food waste represents the way for recycling and may be economically attractive as well.
Flavonoids represent a group of polyphenol compounds with a high antioxidant power. These
phytochemicals are known to reduce many chronic diseases such as cardiovascular diseases,
heart diseases, diabetes, obesity and certain cancer [1]. In this work we investigated the
flavonoids content in seven sunflower seed cakes coming from cold pressed oil production.
Flavonoids are extracted by using 80% ethanol and ultrasound-assisted extraction at 30°C for
10 minutes. Total flavonoid content is determined by a colorimetric method [2]. The results
showed that sunflower seed cakes contained significant amounts of total flavonoids. The total
flavonoids content is found to be in the range from 12.3 to 24.6 mg of catechin equivalent/g.
The results proved that sunflower seed cakes obtained from cold pressed oil production
represent valuable by-product and can be used as a raw material for isolation of bioactive
flavonoids which could be further applied for development of various functional foods.",
publisher = "University of Szeged, H-6720 Szeged, Dugonics tér 13, Hungary",
journal = "24th International Symposium on Analytical and Environmental Problems, Szeged, Hungary",
title = "Sunflower seed cake as a potential bioresource for isolation of flavonoids",
pages = "213-213",
url = "https://hdl.handle.net/21.15107/rcub_fiver_3679"
}

Stojanović, Z., Kravić, S., Đurović, A., Grahovac, N., Romanić, R., Hladni, N.,& Marjanović-Jeromela, A.. (2018). Sunflower seed cake as a potential bioresource for isolation of flavonoids. in 24th International Symposium on Analytical and Environmental Problems, Szeged, Hungary
University of Szeged, H-6720 Szeged, Dugonics tér 13, Hungary., 213-213.
https://hdl.handle.net/21.15107/rcub_fiver_3679

Stojanović Z, Kravić S, Đurović A, Grahovac N, Romanić R, Hladni N, Marjanović-Jeromela A. Sunflower seed cake as a potential bioresource for isolation of flavonoids. in 24th International Symposium on Analytical and Environmental Problems, Szeged, Hungary. 2018;:213-213.
https://hdl.handle.net/21.15107/rcub_fiver_3679 .

Stojanović, Z., Kravić, S., Đurović, A., Grahovac, Nada, Romanić, R, Hladni, Nada, Marjanović-Jeromela, Ana, "Sunflower seed cake as a potential bioresource for isolation of flavonoids" in 24th International Symposium on Analytical and Environmental Problems, Szeged, Hungary (2018):213-213,
https://hdl.handle.net/21.15107/rcub_fiver_3679 .

TY  - CONF
AU  - Stojanović, Z.
AU  - Kravić, S.
AU  - Grahovac, Nada
AU  - Romanić, R
AU  - Đurović, A.
AU  - Hladni, Nada
AU  - Marjanović-Jeromela, Ana
PY  - 2018
UR  - http://fiver.ifvcns.rs/handle/123456789/3684
AB  - Seme suncokreta se odavnina koristi u Ijudskoj ishrani i u danaSnje vreme predstavlja jednu
od najvise gajenih uljanih kultura u svetu. Razlikuju se dva tipa suncokreta koji se gaje, uljani
tip | konzumni tip. Uljani tip suncokreta se proizvodi za dobijanje jestivog biljnog ulja, dok
se konzumni suncokret odlikuje manjim sadrzajem ulja i visokim sadrzajem proteina i drugih
bioloski aktivnih jedinjenja, i koristi se preteZno za lIjudsku ishranu usled visoke hranljive
vrednosti. U poslednje vreme, mogucnost proizvodnje ulja od konzumnog suncokreta je
predmet interesovanja kako u nauénim krugovima, tako i u krugovima proizvodaga i
preradivaéa. Ulja iz konzumnog suncokreta dobijaju se cedenjem, tj. primenom mehanickih
presa i delovanjem sile na seme. Nerafinisano, hladno cedeno ulje poseduje karakteristi€na
senzorna svojstva i sadrzi ocuvane bioaktivne komponente koje poti€u iz semena
suncokreta. Usled odsustva rafinacije, ova ulja su specificna po svom izgledu, boji, mirisu i
ukusu, hemijskom sastavu, nutritivnoj vrednosti i odrzivosti. Nakon mehanickog izdvajanja
ulja presovanjem semena zaostaje pogaca koja prakti¢no predstavija otpad iz prehrambene
industrije i najéeée se koristi za ishranu Zivotinja. Pored visokog sadrzaja proteina, pogaca
sadrizi znaéajne koliéine biologki aktivnih jedinjenja, te moze predstavijati polaznu sirovinu
za dobijanje ekstrakata koji sadrze visoko vredna jedinjenja i koji bi dalje mogli da se koriste
za obogacivanje prehrambenih proizvoda ili kao dodaci u farmaceutskim proizvodima.
Polifenoli, pored ostalih vaznih jedinjenja, predstavijaju veoma znacajnu grupu supstanci
koje se nalaze u konzumnom suncokretu. Unosenje ove vrste jedinjenja hranom ima
visestruke efekte na |judsko zdravije, prvenstveno povezanih sa njihovom izrazenom
antioksidativnom aktivnoscu i sposobnosti eliminacije slobodnih radikala. Konzumacija
hrane bogate antioksidantima smanjuje inflamaciju i nivo oksidativnog stresa kod €oveka.??
Takode oni pozitivno uti€u na celokupan kardiovaskularni sistem i proces starenja.
Istrazivanja su potvrdila pozitivnu ulogu polifenolnih jedinjenja u prevenciji razvoja raka,
kardiovaskularnih bolesti, dijabetesa, osteoporoze i neurodegenerativnih bolesti.? $
obzirom na pozitivno dejstvo na zdravije ljudi, otuda i veliko interesovanje za proucavanje
ovih prirodnih jedinjenja, kao i ispitivanje njihovih novih potencijalnih izvora unosa.
Za ekstrakciju polifenola iz razlicitih biljnih materijala mogu se koristiti razli¢ite tehnike
ekstrakcije. Uobiéajeni postupci ekstrakcije su nedovoljno efikasni i ne omogucavaju visoko
iskoriscenje biljnog materijala, zahtevaju upotrebu zna¢ajno vecih kolicina organiskih
rastvaraca, uz istovremeni veliki utroSak energije usled dugotrajnih procesa ekstrakcije,
neophodnosti zagrevanje i mesanja. U poslednje vreme se mnogo cesce koriste moderne
tehnike kao Sto su mikrotalasna i ultrazvuéna ekstrakcija koje se ubrajaju u metode ,,zelene
ekstrakcije“ i imaju za cilj zastitu Zivotne sredine i opsteg zdravlja Ijudi. Generalno, koncept
zelenih tehnika podrazumeva smanjenje ili eliminaciju primene toksi¢nih rastvaraca za
ekstrakciju uz istovremeno povecanje iskoriscenja procesa kroz manji utrosak energije,
manje generisanje otpada, kra¢e vreme trajanja procesa i manje angazovanje operatera.
C3  - 55. Savetovanje Srpskog hemijskog društva, Novi Sad, Srbija
T1  - Optimizacija postupka ekstrakcije polifenola iz pogače konzumnog suncokreta
EP  - 23
SP  - 19
UR  - https://hdl.handle.net/21.15107/rcub_fiver_3684
ER  - 

@conference{
author = "Stojanović, Z. and Kravić, S. and Grahovac, Nada and Romanić, R and Đurović, A. and Hladni, Nada and Marjanović-Jeromela, Ana",
year = "2018",
abstract = "Seme suncokreta se odavnina koristi u Ijudskoj ishrani i u danaSnje vreme predstavlja jednu
od najvise gajenih uljanih kultura u svetu. Razlikuju se dva tipa suncokreta koji se gaje, uljani
tip | konzumni tip. Uljani tip suncokreta se proizvodi za dobijanje jestivog biljnog ulja, dok
se konzumni suncokret odlikuje manjim sadrzajem ulja i visokim sadrzajem proteina i drugih
bioloski aktivnih jedinjenja, i koristi se preteZno za lIjudsku ishranu usled visoke hranljive
vrednosti. U poslednje vreme, mogucnost proizvodnje ulja od konzumnog suncokreta je
predmet interesovanja kako u nauénim krugovima, tako i u krugovima proizvodaga i
preradivaéa. Ulja iz konzumnog suncokreta dobijaju se cedenjem, tj. primenom mehanickih
presa i delovanjem sile na seme. Nerafinisano, hladno cedeno ulje poseduje karakteristi€na
senzorna svojstva i sadrzi ocuvane bioaktivne komponente koje poti€u iz semena
suncokreta. Usled odsustva rafinacije, ova ulja su specificna po svom izgledu, boji, mirisu i
ukusu, hemijskom sastavu, nutritivnoj vrednosti i odrzivosti. Nakon mehanickog izdvajanja
ulja presovanjem semena zaostaje pogaca koja prakti¢no predstavija otpad iz prehrambene
industrije i najéeée se koristi za ishranu Zivotinja. Pored visokog sadrzaja proteina, pogaca
sadrizi znaéajne koliéine biologki aktivnih jedinjenja, te moze predstavijati polaznu sirovinu
za dobijanje ekstrakata koji sadrze visoko vredna jedinjenja i koji bi dalje mogli da se koriste
za obogacivanje prehrambenih proizvoda ili kao dodaci u farmaceutskim proizvodima.
Polifenoli, pored ostalih vaznih jedinjenja, predstavijaju veoma znacajnu grupu supstanci
koje se nalaze u konzumnom suncokretu. Unosenje ove vrste jedinjenja hranom ima
visestruke efekte na |judsko zdravije, prvenstveno povezanih sa njihovom izrazenom
antioksidativnom aktivnoscu i sposobnosti eliminacije slobodnih radikala. Konzumacija
hrane bogate antioksidantima smanjuje inflamaciju i nivo oksidativnog stresa kod €oveka.??
Takode oni pozitivno uti€u na celokupan kardiovaskularni sistem i proces starenja.
Istrazivanja su potvrdila pozitivnu ulogu polifenolnih jedinjenja u prevenciji razvoja raka,
kardiovaskularnih bolesti, dijabetesa, osteoporoze i neurodegenerativnih bolesti.? $
obzirom na pozitivno dejstvo na zdravije ljudi, otuda i veliko interesovanje za proucavanje
ovih prirodnih jedinjenja, kao i ispitivanje njihovih novih potencijalnih izvora unosa.
Za ekstrakciju polifenola iz razlicitih biljnih materijala mogu se koristiti razli¢ite tehnike
ekstrakcije. Uobiéajeni postupci ekstrakcije su nedovoljno efikasni i ne omogucavaju visoko
iskoriscenje biljnog materijala, zahtevaju upotrebu zna¢ajno vecih kolicina organiskih
rastvaraca, uz istovremeni veliki utroSak energije usled dugotrajnih procesa ekstrakcije,
neophodnosti zagrevanje i mesanja. U poslednje vreme se mnogo cesce koriste moderne
tehnike kao Sto su mikrotalasna i ultrazvuéna ekstrakcija koje se ubrajaju u metode ,,zelene
ekstrakcije“ i imaju za cilj zastitu Zivotne sredine i opsteg zdravlja Ijudi. Generalno, koncept
zelenih tehnika podrazumeva smanjenje ili eliminaciju primene toksi¢nih rastvaraca za
ekstrakciju uz istovremeno povecanje iskoriscenja procesa kroz manji utrosak energije,
manje generisanje otpada, kra¢e vreme trajanja procesa i manje angazovanje operatera.",
journal = "55. Savetovanje Srpskog hemijskog društva, Novi Sad, Srbija",
title = "Optimizacija postupka ekstrakcije polifenola iz pogače konzumnog suncokreta",
pages = "23-19",
url = "https://hdl.handle.net/21.15107/rcub_fiver_3684"
}

Stojanović, Z., Kravić, S., Grahovac, N., Romanić, R., Đurović, A., Hladni, N.,& Marjanović-Jeromela, A.. (2018). Optimizacija postupka ekstrakcije polifenola iz pogače konzumnog suncokreta. in 55. Savetovanje Srpskog hemijskog društva, Novi Sad, Srbija, 19-23.
https://hdl.handle.net/21.15107/rcub_fiver_3684

Stojanović Z, Kravić S, Grahovac N, Romanić R, Đurović A, Hladni N, Marjanović-Jeromela A. Optimizacija postupka ekstrakcije polifenola iz pogače konzumnog suncokreta. in 55. Savetovanje Srpskog hemijskog društva, Novi Sad, Srbija. 2018;:19-23.
https://hdl.handle.net/21.15107/rcub_fiver_3684 .

Stojanović, Z., Kravić, S., Grahovac, Nada, Romanić, R, Đurović, A., Hladni, Nada, Marjanović-Jeromela, Ana, "Optimizacija postupka ekstrakcije polifenola iz pogače konzumnog suncokreta" in 55. Savetovanje Srpskog hemijskog društva, Novi Sad, Srbija (2018):19-23,
https://hdl.handle.net/21.15107/rcub_fiver_3684 .

TY  - CONF
AU  - Stojanović, Z.
AU  - Đurović, A.
AU  - Kravić, S.
AU  - Grahovac, Nada
PY  - 2018
UR  - http://fiver.ifvcns.rs/handle/123456789/3708
AB  - Electrochemical detection of various contaminants has been widely used as a powerful tool in quality
control of food and analysis of environmental samples. In this work, electrochemical procedures for
determination of pesticides imidacloprid, metribuzin and metamitron are presented. Thin film layer
electrode is used as a working electrode, while chronopotentiometry is applied as an electroanalytical
technique. For all analysed pesticides, several solution conditions and instrumental parameters
influencing the electroanalytical response of the analytes are examined and optimised in respect to the
height of the analytical signals. The obtained analytical signals for the investigated pesticides are the
result of irreversible reduction of the analyte on the working electrode surface, and for each analyte
one reduction wave is obtained. Under the optimal experimental conditions, proposed
chronopotentiometric methods are validated with the respect to linearity, limit of detection, limit of
quantification, precision, selectivity, recovery and accuracy. Validated chronopotentiometric methods
are applied for analysis of selected pesticides in spiked tap and river water samples. In the analysis of
real samples, proposed methods showed to be sensitive and reproducible, fast (1-5 s analysis time),
and simple since no complicated sample preparation is needed, and therefore are suitable for routine
analysis of pesticides in water samples.
C3  - Proceedings, 4th International Congress “Food Technology, Quality and Safety” and 18th International Symposium “Feed Technology” (FoodTech2018), Novi Sad, Serbia
T1  - Electrochemical determination of selected pesticides in environmental water samples
EP  - 314
SP  - 310
UR  - https://hdl.handle.net/21.15107/rcub_fiver_3708
ER  - 

@conference{
author = "Stojanović, Z. and Đurović, A. and Kravić, S. and Grahovac, Nada",
year = "2018",
abstract = "Electrochemical detection of various contaminants has been widely used as a powerful tool in quality
control of food and analysis of environmental samples. In this work, electrochemical procedures for
determination of pesticides imidacloprid, metribuzin and metamitron are presented. Thin film layer
electrode is used as a working electrode, while chronopotentiometry is applied as an electroanalytical
technique. For all analysed pesticides, several solution conditions and instrumental parameters
influencing the electroanalytical response of the analytes are examined and optimised in respect to the
height of the analytical signals. The obtained analytical signals for the investigated pesticides are the
result of irreversible reduction of the analyte on the working electrode surface, and for each analyte
one reduction wave is obtained. Under the optimal experimental conditions, proposed
chronopotentiometric methods are validated with the respect to linearity, limit of detection, limit of
quantification, precision, selectivity, recovery and accuracy. Validated chronopotentiometric methods
are applied for analysis of selected pesticides in spiked tap and river water samples. In the analysis of
real samples, proposed methods showed to be sensitive and reproducible, fast (1-5 s analysis time),
and simple since no complicated sample preparation is needed, and therefore are suitable for routine
analysis of pesticides in water samples.",
journal = "Proceedings, 4th International Congress “Food Technology, Quality and Safety” and 18th International Symposium “Feed Technology” (FoodTech2018), Novi Sad, Serbia",
title = "Electrochemical determination of selected pesticides in environmental water samples",
pages = "314-310",
url = "https://hdl.handle.net/21.15107/rcub_fiver_3708"
}

Stojanović, Z., Đurović, A., Kravić, S.,& Grahovac, N.. (2018). Electrochemical determination of selected pesticides in environmental water samples. in Proceedings, 4th International Congress “Food Technology, Quality and Safety” and 18th International Symposium “Feed Technology” (FoodTech2018), Novi Sad, Serbia, 310-314.
https://hdl.handle.net/21.15107/rcub_fiver_3708

Stojanović Z, Đurović A, Kravić S, Grahovac N. Electrochemical determination of selected pesticides in environmental water samples. in Proceedings, 4th International Congress “Food Technology, Quality and Safety” and 18th International Symposium “Feed Technology” (FoodTech2018), Novi Sad, Serbia. 2018;:310-314.
https://hdl.handle.net/21.15107/rcub_fiver_3708 .

Stojanović, Z., Đurović, A., Kravić, S., Grahovac, Nada, "Electrochemical determination of selected pesticides in environmental water samples" in Proceedings, 4th International Congress “Food Technology, Quality and Safety” and 18th International Symposium “Feed Technology” (FoodTech2018), Novi Sad, Serbia (2018):310-314,
https://hdl.handle.net/21.15107/rcub_fiver_3708 .

TY  - JOUR
AU  - Đurović, Ana
AU  - Stojanović, Zorica
AU  - Kravić, Snežana
AU  - Zeremski, Tijana
AU  - Grahovac, Nada
AU  - Brezo-Borjan, T.Ž.
PY  - 2018
UR  - http://fiver.ifvcns.rs/handle/123456789/1836
AB  - The work presents results of the determination of metribuzin content in commercial pesticide formulations by applying chronopotentiometry with thin film mercury electrode as an electrochemical sensor. In the analyzed pesticide formulations, a single well defined reduction peak of metribuzin is observed at the potential around -880 mV. The content of the herbicide in commercial formulations is determined using the calibration curve method, by applying the initial potential of -0.21 V, and the final potential of -1.10 V. Recovery values based on the declared and found content of the active ingredient are in the range from 100.67% to 101.68%, with the values of relative standard deviation lower than 1.00%, indicating high accuracy and precision of the presented method.
PB  - Univerzitet u Novom Sadu - Tehnološki fakultet, Novi Sad
T2  - Acta Periodica Technologica
T1  - Determination of metribuzin content in pesticide formulations using electroanalytical methodology
T1  - Određivanje sadržaja metribuzina u formulacijama pesticida primenom elektroanalitičke metodologije
EP  - 51
SP  - 43
VL  - 49
DO  - 10.2298/APT1849043D
ER  - 

@article{
author = "Đurović, Ana and Stojanović, Zorica and Kravić, Snežana and Zeremski, Tijana and Grahovac, Nada and Brezo-Borjan, T.Ž.",
year = "2018",
abstract = "The work presents results of the determination of metribuzin content in commercial pesticide formulations by applying chronopotentiometry with thin film mercury electrode as an electrochemical sensor. In the analyzed pesticide formulations, a single well defined reduction peak of metribuzin is observed at the potential around -880 mV. The content of the herbicide in commercial formulations is determined using the calibration curve method, by applying the initial potential of -0.21 V, and the final potential of -1.10 V. Recovery values based on the declared and found content of the active ingredient are in the range from 100.67% to 101.68%, with the values of relative standard deviation lower than 1.00%, indicating high accuracy and precision of the presented method.",
publisher = "Univerzitet u Novom Sadu - Tehnološki fakultet, Novi Sad",
journal = "Acta Periodica Technologica",
title = "Determination of metribuzin content in pesticide formulations using electroanalytical methodology, Određivanje sadržaja metribuzina u formulacijama pesticida primenom elektroanalitičke metodologije",
pages = "51-43",
volume = "49",
doi = "10.2298/APT1849043D"
}

Đurović, A., Stojanović, Z., Kravić, S., Zeremski, T., Grahovac, N.,& Brezo-Borjan, T.Ž.. (2018). Determination of metribuzin content in pesticide formulations using electroanalytical methodology. in Acta Periodica Technologica
Univerzitet u Novom Sadu - Tehnološki fakultet, Novi Sad., 49, 43-51.
https://doi.org/10.2298/APT1849043D

Đurović A, Stojanović Z, Kravić S, Zeremski T, Grahovac N, Brezo-Borjan T. Determination of metribuzin content in pesticide formulations using electroanalytical methodology. in Acta Periodica Technologica. 2018;49:43-51.
doi:10.2298/APT1849043D .

Đurović, Ana, Stojanović, Zorica, Kravić, Snežana, Zeremski, Tijana, Grahovac, Nada, Brezo-Borjan, T.Ž., "Determination of metribuzin content in pesticide formulations using electroanalytical methodology" in Acta Periodica Technologica, 49 (2018):43-51,
https://doi.org/10.2298/APT1849043D . .

TY  - JOUR
AU  - Đurović, Ana
AU  - Stojanović, Zorica
AU  - Kravić, Snežana
AU  - Rakić, Dušan
AU  - Grahovac, Nada
PY  - 2018
UR  - http://fiver.ifvcns.rs/handle/123456789/1792
AB  - In this paper, a chronopotentiometric method for the determination of herbicide metamitron (MTM) using a glassy carbon electrode (GCE) and a thin film mercury electrode (TFME) as working electrodes is presented. MTM provided a well-defined reductive peak in the Britton-Robinson buffer on both working electrodes. Instrumental and chemical factors such as pH of the buffer, initial potential and reduction current influencing MTM chronopotentiometric response were optimised with the Box-Behnken experimental design. Under the optimal combination of factors, the analytical signal was linear in the MTM concentration range of 0.8-30mg/L, with a detection limit of 68.53 mu g/L using a TFME, and in the concentration range of 1-30mg/L, with a detection limit of 92.91 mu g/L using a GCE. The precision of the method was estimated as a function of repeatability and reproducibility, with the value of relative standard deviation lower than 2.6%. The applicability of the method was verified by direct analysis of MTM in spiked water samples and commercial pesticide formulations. The obtained results were in good agreement with those obtained using liquid chromatography/tandem mass spectrometry (LC-MS/MS) method, or with those labelled by the manufacturer. By using chronopotentiometry, neither extraction nor preconcentration procedures are necessary, thus making this method simple, cost-effective and more feasible for analytical routine analysis.
PB  - Taylor & Francis Ltd, Abingdon
T2  - International Journal of Environmental Analytical Chemistry
T1  - Novel electrochemical procedure for the determination of metamitron
EP  - 385
IS  - 4
SP  - 369
VL  - 98
DO  - 10.1080/03067319.2018.1469625
ER  - 

@article{
author = "Đurović, Ana and Stojanović, Zorica and Kravić, Snežana and Rakić, Dušan and Grahovac, Nada",
year = "2018",
abstract = "In this paper, a chronopotentiometric method for the determination of herbicide metamitron (MTM) using a glassy carbon electrode (GCE) and a thin film mercury electrode (TFME) as working electrodes is presented. MTM provided a well-defined reductive peak in the Britton-Robinson buffer on both working electrodes. Instrumental and chemical factors such as pH of the buffer, initial potential and reduction current influencing MTM chronopotentiometric response were optimised with the Box-Behnken experimental design. Under the optimal combination of factors, the analytical signal was linear in the MTM concentration range of 0.8-30mg/L, with a detection limit of 68.53 mu g/L using a TFME, and in the concentration range of 1-30mg/L, with a detection limit of 92.91 mu g/L using a GCE. The precision of the method was estimated as a function of repeatability and reproducibility, with the value of relative standard deviation lower than 2.6%. The applicability of the method was verified by direct analysis of MTM in spiked water samples and commercial pesticide formulations. The obtained results were in good agreement with those obtained using liquid chromatography/tandem mass spectrometry (LC-MS/MS) method, or with those labelled by the manufacturer. By using chronopotentiometry, neither extraction nor preconcentration procedures are necessary, thus making this method simple, cost-effective and more feasible for analytical routine analysis.",
publisher = "Taylor & Francis Ltd, Abingdon",
journal = "International Journal of Environmental Analytical Chemistry",
title = "Novel electrochemical procedure for the determination of metamitron",
pages = "385-369",
number = "4",
volume = "98",
doi = "10.1080/03067319.2018.1469625"
}

Đurović, A., Stojanović, Z., Kravić, S., Rakić, D.,& Grahovac, N.. (2018). Novel electrochemical procedure for the determination of metamitron. in International Journal of Environmental Analytical Chemistry
Taylor & Francis Ltd, Abingdon., 98(4), 369-385.
https://doi.org/10.1080/03067319.2018.1469625

Đurović A, Stojanović Z, Kravić S, Rakić D, Grahovac N. Novel electrochemical procedure for the determination of metamitron. in International Journal of Environmental Analytical Chemistry. 2018;98(4):369-385.
doi:10.1080/03067319.2018.1469625 .

Đurović, Ana, Stojanović, Zorica, Kravić, Snežana, Rakić, Dušan, Grahovac, Nada, "Novel electrochemical procedure for the determination of metamitron" in International Journal of Environmental Analytical Chemistry, 98, no. 4 (2018):369-385,
https://doi.org/10.1080/03067319.2018.1469625 . .

TY  - CONF
AU  - Đurović, A.
AU  - Stojanović, Z.
AU  - Kravić, S.
AU  - Suturović, Z.
AU  - Grahovac, Nada
PY  - 2017
UR  - http://fiver.ifvcns.rs/handle/123456789/3687
AB  - The most important experimental parameters were investigated for chronopotentiometric
determination of imidacloprid using thin film antimony electrode as a working electrode. The
film of antimony was ex-sifu plated on the glassy carbon electrode. Britton-Robinson buffer
pH 10 was used as an optimal supporting electrolyte, where imidacloprid provided a well
define and reproductive reduction signal at the potential of -1100 mV (vs. Ag/AgCl, 3.5
mol/dm’* KCI). Based on the height and reproducibility of the analytical signal, initial potential
of -0.51 V was accepted as optimal, while selected optimal ranges of reduction current were
from -5 pA to -14.4 pA, and from -4.6 pA to -18.2 pA, for concentrations of 2 mg/dm” and 10
mg/dm°*, respectively. It was determined that analytical signal of imidacloprid decreased
exponentially with more negative values of reduction current. Before application of this
method to environmental samples. additional experiments related to method validation are
necessary.
PB  - Szeged : University of Szeged, Department of Inorganic and Analytical Chemistry
C3  - 23rd International Symposium on Analytical and Environmental Problems, Szeged, Hungary
T1  - Antimony film electrode for chronopotentiometric determination of insecticide imidacloprid
EP  - 164
SP  - 160
UR  - https://hdl.handle.net/21.15107/rcub_fiver_3687
ER  - 

@conference{
author = "Đurović, A. and Stojanović, Z. and Kravić, S. and Suturović, Z. and Grahovac, Nada",
year = "2017",
abstract = "The most important experimental parameters were investigated for chronopotentiometric
determination of imidacloprid using thin film antimony electrode as a working electrode. The
film of antimony was ex-sifu plated on the glassy carbon electrode. Britton-Robinson buffer
pH 10 was used as an optimal supporting electrolyte, where imidacloprid provided a well
define and reproductive reduction signal at the potential of -1100 mV (vs. Ag/AgCl, 3.5
mol/dm’* KCI). Based on the height and reproducibility of the analytical signal, initial potential
of -0.51 V was accepted as optimal, while selected optimal ranges of reduction current were
from -5 pA to -14.4 pA, and from -4.6 pA to -18.2 pA, for concentrations of 2 mg/dm” and 10
mg/dm°*, respectively. It was determined that analytical signal of imidacloprid decreased
exponentially with more negative values of reduction current. Before application of this
method to environmental samples. additional experiments related to method validation are
necessary.",
publisher = "Szeged : University of Szeged, Department of Inorganic and Analytical Chemistry",
journal = "23rd International Symposium on Analytical and Environmental Problems, Szeged, Hungary",
title = "Antimony film electrode for chronopotentiometric determination of insecticide imidacloprid",
pages = "164-160",
url = "https://hdl.handle.net/21.15107/rcub_fiver_3687"
}

Đurović, A., Stojanović, Z., Kravić, S., Suturović, Z.,& Grahovac, N.. (2017). Antimony film electrode for chronopotentiometric determination of insecticide imidacloprid. in 23rd International Symposium on Analytical and Environmental Problems, Szeged, Hungary
Szeged : University of Szeged, Department of Inorganic and Analytical Chemistry., 160-164.
https://hdl.handle.net/21.15107/rcub_fiver_3687

Đurović A, Stojanović Z, Kravić S, Suturović Z, Grahovac N. Antimony film electrode for chronopotentiometric determination of insecticide imidacloprid. in 23rd International Symposium on Analytical and Environmental Problems, Szeged, Hungary. 2017;:160-164.
https://hdl.handle.net/21.15107/rcub_fiver_3687 .

Đurović, A., Stojanović, Z., Kravić, S., Suturović, Z., Grahovac, Nada, "Antimony film electrode for chronopotentiometric determination of insecticide imidacloprid" in 23rd International Symposium on Analytical and Environmental Problems, Szeged, Hungary (2017):160-164,
https://hdl.handle.net/21.15107/rcub_fiver_3687 .

TY  - JOUR
AU  - Đurović, Ana
AU  - Stojanović, Zorica
AU  - Kravić, Snežana
AU  - Grahovac, Nada
AU  - Bursić, Vojislava
AU  - Vuković, Gorica
AU  - Suturović, Zvonimir
PY  - 2016
UR  - http://fiver.ifvcns.rs/handle/123456789/1508
AB  - A new electrochemical method for determination of imidacloprid using chronopotentiometry on thin film mercury and glassy carbon electrode was presented. The most important experimental parameters of chronopotentiometry were examined and optimized with respect to imidacloprid analytical signal. Imidacloprid provided well-defined reduction peak in Britton-Robinson buffer on thin film mercury electrode at -1.0V (versus Ag/AgCl (KCl, 3.5 mol/L)) and on glassy carbon electrode at -1.2V (versus Ag/AgCl (KCl, 3.5mol/L)). The reduction time was linearly proportional to concentrations from 0.8 to 30.0 mg/L on thin film mercury electrode and from 7.0 to 70.0mg/L on glassy carbon electrode. The detection limits were 0.17mg/L and 0.93mg/L for thin film mercury and glassy carbon electrode, respectively. The estimation of method precision as a function of repeatability and reproducibility showed relative standard deviations values lower than 3.73%. Recovery values from 97.3 to 98.1% confirmed the accuracy of the proposed method, while the constancy of the transition time with deliberated small changes in the experimental parameters indicated a very good robustness. A minor influence of possible interfering compounds proved good selectivity of the method. Developed method was applied for imidacloprid determination in commercial pesticide formulations and river water samples.
PB  - Hindawi Ltd, London
T2  - International Journal of Analytical Chemistry
T1  - Development and Validation of Chronopotentiometric Method for Imidacloprid Determination in Pesticide Formulations and River Water Samples
VL  - 2016
DO  - 10.1155/2016/5138491
ER  - 

@article{
author = "Đurović, Ana and Stojanović, Zorica and Kravić, Snežana and Grahovac, Nada and Bursić, Vojislava and Vuković, Gorica and Suturović, Zvonimir",
year = "2016",
abstract = "A new electrochemical method for determination of imidacloprid using chronopotentiometry on thin film mercury and glassy carbon electrode was presented. The most important experimental parameters of chronopotentiometry were examined and optimized with respect to imidacloprid analytical signal. Imidacloprid provided well-defined reduction peak in Britton-Robinson buffer on thin film mercury electrode at -1.0V (versus Ag/AgCl (KCl, 3.5 mol/L)) and on glassy carbon electrode at -1.2V (versus Ag/AgCl (KCl, 3.5mol/L)). The reduction time was linearly proportional to concentrations from 0.8 to 30.0 mg/L on thin film mercury electrode and from 7.0 to 70.0mg/L on glassy carbon electrode. The detection limits were 0.17mg/L and 0.93mg/L for thin film mercury and glassy carbon electrode, respectively. The estimation of method precision as a function of repeatability and reproducibility showed relative standard deviations values lower than 3.73%. Recovery values from 97.3 to 98.1% confirmed the accuracy of the proposed method, while the constancy of the transition time with deliberated small changes in the experimental parameters indicated a very good robustness. A minor influence of possible interfering compounds proved good selectivity of the method. Developed method was applied for imidacloprid determination in commercial pesticide formulations and river water samples.",
publisher = "Hindawi Ltd, London",
journal = "International Journal of Analytical Chemistry",
title = "Development and Validation of Chronopotentiometric Method for Imidacloprid Determination in Pesticide Formulations and River Water Samples",
volume = "2016",
doi = "10.1155/2016/5138491"
}

Đurović, A., Stojanović, Z., Kravić, S., Grahovac, N., Bursić, V., Vuković, G.,& Suturović, Z.. (2016). Development and Validation of Chronopotentiometric Method for Imidacloprid Determination in Pesticide Formulations and River Water Samples. in International Journal of Analytical Chemistry
Hindawi Ltd, London., 2016.
https://doi.org/10.1155/2016/5138491

Đurović A, Stojanović Z, Kravić S, Grahovac N, Bursić V, Vuković G, Suturović Z. Development and Validation of Chronopotentiometric Method for Imidacloprid Determination in Pesticide Formulations and River Water Samples. in International Journal of Analytical Chemistry. 2016;2016.
doi:10.1155/2016/5138491 .

Đurović, Ana, Stojanović, Zorica, Kravić, Snežana, Grahovac, Nada, Bursić, Vojislava, Vuković, Gorica, Suturović, Zvonimir, "Development and Validation of Chronopotentiometric Method for Imidacloprid Determination in Pesticide Formulations and River Water Samples" in International Journal of Analytical Chemistry, 2016 (2016),
https://doi.org/10.1155/2016/5138491 . .

TY  - JOUR
AU  - Stojanović, Zorica
AU  - Đurović, Ana
AU  - Kravić, Snežana
AU  - Grahovac, Nada
AU  - Suturović, Zvonimir
AU  - Bursić, Vojislava
AU  - Vuković, Gorica
AU  - Brezo, Tanja
PY  - 2016
UR  - http://fiver.ifvcns.rs/handle/123456789/1553
AB  - This paper describes an electroanalytical method for the determination of metribuzin using a thin film mercury electrode by chronopotentiometry. Research included optimization of the most important parameters of chronopotentiometric analysis and the best responses were achieved in Britton-Robinson buffer at pH 5.0, using an initial potential of -0.21 V, ending potential of -1.1 V, and reduction current in the range from -4 mu A to -15 mA. Under these conditions, metribuzin was reduced in an irreversible electrode reaction process with one well-defined reduction wave at -0.83 V (vs. Ag/AgCl, KCl, 3.5 mol dm(-3)). A linear response was observed for three concentration ranges 1-5, 5-15 and 15-30 mg dm(-3), with an achieved limit of detection of 0.042 mg dm(-3). The precision was determined as a function of repeatability and reproducibility, which showed relative standard deviation values not higher than 3.18%. Various interfering substances did not interfere with metribuzin determination. The proposed method was successfully applied to tap and river water samples. The recovery values obtained for spiked river water samples were in good statistical agreement with those obtained by the LC-MS/MS method. Accordingly, the proposed chronopotentiometric methodology can be conveniently applied in the quality control of environmental water samples as a simple, sensitive, reliable and low cost method.
PB  - Royal Soc Chemistry, Cambridge
T2  - Analytical Methods
T1  - A simple and rapid electrochemical sensing method for metribuzin determination in tap and river water samples
EP  - 2705
IS  - 12
SP  - 2698
VL  - 8
DO  - 10.1039/c5ay03243a
ER  - 

@article{
author = "Stojanović, Zorica and Đurović, Ana and Kravić, Snežana and Grahovac, Nada and Suturović, Zvonimir and Bursić, Vojislava and Vuković, Gorica and Brezo, Tanja",
year = "2016",
abstract = "This paper describes an electroanalytical method for the determination of metribuzin using a thin film mercury electrode by chronopotentiometry. Research included optimization of the most important parameters of chronopotentiometric analysis and the best responses were achieved in Britton-Robinson buffer at pH 5.0, using an initial potential of -0.21 V, ending potential of -1.1 V, and reduction current in the range from -4 mu A to -15 mA. Under these conditions, metribuzin was reduced in an irreversible electrode reaction process with one well-defined reduction wave at -0.83 V (vs. Ag/AgCl, KCl, 3.5 mol dm(-3)). A linear response was observed for three concentration ranges 1-5, 5-15 and 15-30 mg dm(-3), with an achieved limit of detection of 0.042 mg dm(-3). The precision was determined as a function of repeatability and reproducibility, which showed relative standard deviation values not higher than 3.18%. Various interfering substances did not interfere with metribuzin determination. The proposed method was successfully applied to tap and river water samples. The recovery values obtained for spiked river water samples were in good statistical agreement with those obtained by the LC-MS/MS method. Accordingly, the proposed chronopotentiometric methodology can be conveniently applied in the quality control of environmental water samples as a simple, sensitive, reliable and low cost method.",
publisher = "Royal Soc Chemistry, Cambridge",
journal = "Analytical Methods",
title = "A simple and rapid electrochemical sensing method for metribuzin determination in tap and river water samples",
pages = "2705-2698",
number = "12",
volume = "8",
doi = "10.1039/c5ay03243a"
}

Stojanović, Z., Đurović, A., Kravić, S., Grahovac, N., Suturović, Z., Bursić, V., Vuković, G.,& Brezo, T.. (2016). A simple and rapid electrochemical sensing method for metribuzin determination in tap and river water samples. in Analytical Methods
Royal Soc Chemistry, Cambridge., 8(12), 2698-2705.
https://doi.org/10.1039/c5ay03243a

Stojanović Z, Đurović A, Kravić S, Grahovac N, Suturović Z, Bursić V, Vuković G, Brezo T. A simple and rapid electrochemical sensing method for metribuzin determination in tap and river water samples. in Analytical Methods. 2016;8(12):2698-2705.
doi:10.1039/c5ay03243a .

Stojanović, Zorica, Đurović, Ana, Kravić, Snežana, Grahovac, Nada, Suturović, Zvonimir, Bursić, Vojislava, Vuković, Gorica, Brezo, Tanja, "A simple and rapid electrochemical sensing method for metribuzin determination in tap and river water samples" in Analytical Methods, 8, no. 12 (2016):2698-2705,
https://doi.org/10.1039/c5ay03243a . .

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 .

TY  - JOUR
AU  - Škrinjar, Marija M.
AU  - Miklič, Vladimir
AU  - Kocić-Tanackov, Sunčica
AU  - Marjanović-Jeromela, Ana
AU  - Maširević, Stevan
AU  - Suturović, Irena Z.
AU  - Blagojev, Nevena T.
AU  - Šošo, Vladislava M.
PY  - 2013
UR  - http://fiver.ifvcns.rs/handle/123456789/1281
AB  - This paper presents the results of an investigation related to mycological populations of rapeseed samples produced in the Institute of Field and Vegetable Crops in Novi Sad (location: Rimski Šančevi, Novi Sad), with a special emphasis on the potentially toxigenic mycopopulations. Mycological investigations were performed on the samples that were treated with 4% solution of Na-hypochlorite, and on the ones that were not submitted to this treatment. Isolation and determination of total mould count was carried out using Dichloran Glycerol Agar (DG18). The identification of isolated moulds was done according to modern keys for fungal determination. From 20 untreated tested samples, 17 were contaminated with moulds (10.0 to 4.7x102 cfu/g). When the samples were treated with 4% solution of Na-hypochlorite, moulds were isolated only form 4 samples, and the total mould count ranged from 10.0 to 60.0 cfu/g. In the isolated mycopopulations, xerophilic moulds dominated, especially those from the genera Aspergillus, Eurotium and Penicillium. In the isolated mycopopulations, high degree of isolated species belonged to toxigenic species from the genera Alternaria, Aspergillus, Fusarium, Eurotium and Penicillium.
AB  - U radu su data istraživanja vezana za mikološku populaciju u uzorcima uljane repice proizvedene u Institutu za ratarstvo i povrtarstvo (lokacija Rimski Šančevi, Novi Sad), sa posebnim osvrtom na potencijalno toksigenu mikopopulaciju. Mikološka ispitivanja su izvedena u uzorcima koji su tretirani sa Na-hipohloritom, kao i u uzorcima koji nisu podvrgnuti ovom tretmanu. Izolacija i određivanje ukupnog broja plesni izvedeno je na Dixloran Glicerol agaru. Identifikacija izolovanih vrsta plesni izvedena je prema ključevima za determinaciju koji su opisani u literaturi. Od 20 ispitanih uzoraka u 17 je utvrđeno prisustvo plesni i ukupan broj se kretao do 10 do 4,7x102 cfu/g. Kada su uzorci tretirani 4% rastvorom Na-hipohlorita plesni su izolovane iz 4 uzorka, a ukupni broj plesni se kretao od 10,0 do 60,0 cfu/g. U izolovanoj mikopopulaciji dominirale su kserofilne vrste iz rodova Aspergillus, Eurotium i Penicillium. Izolovanu mikopopulaciju u visokom procentu činile se potencijalne toksigene vrste iz rodova Alternaria, Aspergillus, Fusarium, Eurotium i Penicillium.
PB  - Univerzitet u Novom Sadu - Tehnološki fakultet, Novi Sad
T2  - Acta Periodica Technologica
T1  - Xerophilic mycopopulations isolated from rapeseeds (Brassica napus)
T1  - Kserofilne mikopopulacije izolovane iz semena uljane repice
EP  - 124
SP  - 115
VL  - 44
DO  - 10.2298/APT1344115S
ER  - 

@article{
author = "Škrinjar, Marija M. and Miklič, Vladimir and Kocić-Tanackov, Sunčica and Marjanović-Jeromela, Ana and Maširević, Stevan and Suturović, Irena Z. and Blagojev, Nevena T. and Šošo, Vladislava M.",
year = "2013",
abstract = "This paper presents the results of an investigation related to mycological populations of rapeseed samples produced in the Institute of Field and Vegetable Crops in Novi Sad (location: Rimski Šančevi, Novi Sad), with a special emphasis on the potentially toxigenic mycopopulations. Mycological investigations were performed on the samples that were treated with 4% solution of Na-hypochlorite, and on the ones that were not submitted to this treatment. Isolation and determination of total mould count was carried out using Dichloran Glycerol Agar (DG18). The identification of isolated moulds was done according to modern keys for fungal determination. From 20 untreated tested samples, 17 were contaminated with moulds (10.0 to 4.7x102 cfu/g). When the samples were treated with 4% solution of Na-hypochlorite, moulds were isolated only form 4 samples, and the total mould count ranged from 10.0 to 60.0 cfu/g. In the isolated mycopopulations, xerophilic moulds dominated, especially those from the genera Aspergillus, Eurotium and Penicillium. In the isolated mycopopulations, high degree of isolated species belonged to toxigenic species from the genera Alternaria, Aspergillus, Fusarium, Eurotium and Penicillium., U radu su data istraživanja vezana za mikološku populaciju u uzorcima uljane repice proizvedene u Institutu za ratarstvo i povrtarstvo (lokacija Rimski Šančevi, Novi Sad), sa posebnim osvrtom na potencijalno toksigenu mikopopulaciju. Mikološka ispitivanja su izvedena u uzorcima koji su tretirani sa Na-hipohloritom, kao i u uzorcima koji nisu podvrgnuti ovom tretmanu. Izolacija i određivanje ukupnog broja plesni izvedeno je na Dixloran Glicerol agaru. Identifikacija izolovanih vrsta plesni izvedena je prema ključevima za determinaciju koji su opisani u literaturi. Od 20 ispitanih uzoraka u 17 je utvrđeno prisustvo plesni i ukupan broj se kretao do 10 do 4,7x102 cfu/g. Kada su uzorci tretirani 4% rastvorom Na-hipohlorita plesni su izolovane iz 4 uzorka, a ukupni broj plesni se kretao od 10,0 do 60,0 cfu/g. U izolovanoj mikopopulaciji dominirale su kserofilne vrste iz rodova Aspergillus, Eurotium i Penicillium. Izolovanu mikopopulaciju u visokom procentu činile se potencijalne toksigene vrste iz rodova Alternaria, Aspergillus, Fusarium, Eurotium i Penicillium.",
publisher = "Univerzitet u Novom Sadu - Tehnološki fakultet, Novi Sad",
journal = "Acta Periodica Technologica",
title = "Xerophilic mycopopulations isolated from rapeseeds (Brassica napus), Kserofilne mikopopulacije izolovane iz semena uljane repice",
pages = "124-115",
volume = "44",
doi = "10.2298/APT1344115S"
}

Škrinjar, M. M., Miklič, V., Kocić-Tanackov, S., Marjanović-Jeromela, A., Maširević, S., Suturović, I. Z., Blagojev, N. T.,& Šošo, V. M.. (2013). Xerophilic mycopopulations isolated from rapeseeds (Brassica napus). in Acta Periodica Technologica
Univerzitet u Novom Sadu - Tehnološki fakultet, Novi Sad., 44, 115-124.
https://doi.org/10.2298/APT1344115S

Škrinjar MM, Miklič V, Kocić-Tanackov S, Marjanović-Jeromela A, Maširević S, Suturović IZ, Blagojev NT, Šošo VM. Xerophilic mycopopulations isolated from rapeseeds (Brassica napus). in Acta Periodica Technologica. 2013;44:115-124.
doi:10.2298/APT1344115S .

Škrinjar, Marija M., Miklič, Vladimir, Kocić-Tanackov, Sunčica, Marjanović-Jeromela, Ana, Maširević, Stevan, Suturović, Irena Z., Blagojev, Nevena T., Šošo, Vladislava M., "Xerophilic mycopopulations isolated from rapeseeds (Brassica napus)" in Acta Periodica Technologica, 44 (2013):115-124,
https://doi.org/10.2298/APT1344115S . .