TY  - JOUR
AU  - Nešović, Milica
AU  - Gašić, Uroš
AU  - Tosti, Tomislav
AU  - Horvacki, Nikola
AU  - Nedić, Nebojša
AU  - Sredojević, Milica
AU  - Blagojević, Stevan
AU  - Ignjatović, Ljubiša
AU  - Tešić, Živoslav
PY  - 2021
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/5911
AB  - The aim of this study was to provide information on the phenolic and sugar profiles of different parts of the buckwheat plant, which can define that buckwheat is a functional food, with a high nutritional value and very useful for human health. Therefore, the extracts of buckwheat leaf, stem, and flower, as well as buckwheat grain were analysed for the content of polyphenol and antioxidant tests. The identification of a notable number of phenolic compounds and quantification of sugars in different parts of buckwheat indicates that buckwheat is a highly valuable plant. A total of 60 phenolic compounds were identified (18 cinnamic acid derivatives, 14 flavonols, 13 flavan-3-ols (including proanthocyanidins), 10 hydroxybenzoic acid derivatives, and 5 flavones) using ultra-high-performance liquid chromatography (UHPLC), coupled with a hybrid mass spectrometer which combines the Linear Trap Quadrupole (LTQ) and OrbiTrap mass analyzer. The highest number of phenolic compounds was found in the analysed buckwheat flower sample, and then in the leaf, followed by the grain and the stem. In addition, the sugar profile of buckwheat leaf, stem, flower and grain, as well as the buckwheat pollen and the nectar was analysed. Hence, 16 sugars and 5 sugar alcohols were detected by the high-performance anion exchange chromatography (HPAEC) with a pulsed amperometric detector (PAD). Sucrose was found in a significant amount with the highest content in buckwheat leaf. Trisaccharides had similar accumulation in the sample extracts, while disaccharides dominated in buckwheat leaf, followed by nectar and pollen. The sugar alcohols showed the highest content in buckwheat grain, where erythritol was predominant. The obtained results show that buckwheat is very rich in phenolic compounds and sugars. In addition to grain, the other parts of the buckwheat plant can be used as a very good source of different classes of phenolic compounds. This study provides useful information on the distribution of phytochemicals in different parts of the buckwheat plant, which contribute to the maintaining of the status of buckwheat as a functional food.
PB  - Royal Society of Chemistry
T2  - RSC Advances
T1  - Distribution of polyphenolic and sugar compounds in different buckwheat plant parts
EP  - 25829
IS  - 42
SP  - 25816
VL  - 11
DO  - 10.1039/d1ra04250e
ER  - 

@article{
author = "Nešović, Milica and Gašić, Uroš and Tosti, Tomislav and Horvacki, Nikola and Nedić, Nebojša and Sredojević, Milica and Blagojević, Stevan and Ignjatović, Ljubiša and Tešić, Živoslav",
year = "2021",
abstract = "The aim of this study was to provide information on the phenolic and sugar profiles of different parts of the buckwheat plant, which can define that buckwheat is a functional food, with a high nutritional value and very useful for human health. Therefore, the extracts of buckwheat leaf, stem, and flower, as well as buckwheat grain were analysed for the content of polyphenol and antioxidant tests. The identification of a notable number of phenolic compounds and quantification of sugars in different parts of buckwheat indicates that buckwheat is a highly valuable plant. A total of 60 phenolic compounds were identified (18 cinnamic acid derivatives, 14 flavonols, 13 flavan-3-ols (including proanthocyanidins), 10 hydroxybenzoic acid derivatives, and 5 flavones) using ultra-high-performance liquid chromatography (UHPLC), coupled with a hybrid mass spectrometer which combines the Linear Trap Quadrupole (LTQ) and OrbiTrap mass analyzer. The highest number of phenolic compounds was found in the analysed buckwheat flower sample, and then in the leaf, followed by the grain and the stem. In addition, the sugar profile of buckwheat leaf, stem, flower and grain, as well as the buckwheat pollen and the nectar was analysed. Hence, 16 sugars and 5 sugar alcohols were detected by the high-performance anion exchange chromatography (HPAEC) with a pulsed amperometric detector (PAD). Sucrose was found in a significant amount with the highest content in buckwheat leaf. Trisaccharides had similar accumulation in the sample extracts, while disaccharides dominated in buckwheat leaf, followed by nectar and pollen. The sugar alcohols showed the highest content in buckwheat grain, where erythritol was predominant. The obtained results show that buckwheat is very rich in phenolic compounds and sugars. In addition to grain, the other parts of the buckwheat plant can be used as a very good source of different classes of phenolic compounds. This study provides useful information on the distribution of phytochemicals in different parts of the buckwheat plant, which contribute to the maintaining of the status of buckwheat as a functional food.",
publisher = "Royal Society of Chemistry",
journal = "RSC Advances",
title = "Distribution of polyphenolic and sugar compounds in different buckwheat plant parts",
pages = "25829-25816",
number = "42",
volume = "11",
doi = "10.1039/d1ra04250e"
}

Nešović, M., Gašić, U., Tosti, T., Horvacki, N., Nedić, N., Sredojević, M., Blagojević, S., Ignjatović, L.,& Tešić, Ž.. (2021). Distribution of polyphenolic and sugar compounds in different buckwheat plant parts. in RSC Advances
Royal Society of Chemistry., 11(42), 25816-25829.
https://doi.org/10.1039/d1ra04250e

Nešović M, Gašić U, Tosti T, Horvacki N, Nedić N, Sredojević M, Blagojević S, Ignjatović L, Tešić Ž. Distribution of polyphenolic and sugar compounds in different buckwheat plant parts. in RSC Advances. 2021;11(42):25816-25829.
doi:10.1039/d1ra04250e .

Nešović, Milica, Gašić, Uroš, Tosti, Tomislav, Horvacki, Nikola, Nedić, Nebojša, Sredojević, Milica, Blagojević, Stevan, Ignjatović, Ljubiša, Tešić, Živoslav, "Distribution of polyphenolic and sugar compounds in different buckwheat plant parts" in RSC Advances, 11, no. 42 (2021):25816-25829,
https://doi.org/10.1039/d1ra04250e . .

TY  - JOUR
AU  - Savić-Bisercić, Marjetka
AU  - Pezo, Lato
AU  - Sredović-Ignjatović, Ivana
AU  - Ignjatović, Ljubiša M.
AU  - Savić, Andrija
AU  - Jovanović, Uroš D.
AU  - Andrić, Velibor
PY  - 2016
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/4030
AB  - Two mechanical extraction techniques were used for the extraction of environmentaly interesting components of coal fly ash: shaking, during which the extraction process lasted from 6 up to 24 h, and sonication that lasted from 15 up to 60 min, using water as extractant. The concentration of anions in fly ash extracts was determined by ion chromatography, while atomic absorption spectrometry was used for determination of: As, Pb, Cd, Ni, Cr, Zn, Cu, Fe, Mn and Al. The ultrasonication yielded slightly higher amounts of extracted anions as well as Pb, Al, Mn and Fe cations, while shaking-assisted extraction was more efficient for the Cr, As, Zn and Ni ions. The changes in pH value, particle size distribution within colloid solution, zeta potential and conductivity during ultrasound-assisted extraction were measured in order to explain changes that occur on the surface of fly ash particles contacting water and different processes (adsorption, ion exchange and flocculation) that develop under natural conditions. Principal Component Analysis was used for assessing the effect of observed process parameters. It is essential to evaluate quantity of these elements leachable from coal fly ash into the surface waters in natural conditions in order to prevent contamination of the environment.
PB  - Srpsko hemijsko društvo, Beograd
T2  - JOURNAL OF THE SERBIAN CHEMICAL SOCIETY
T1  - Ultrasound and shacking-assisted water-leaching of anions and cations from fly ash
EP  - 827
IS  - 7
SP  - 813
VL  - 81
DO  - 10.2298/JSC151222027B
ER  - 

@article{
author = "Savić-Bisercić, Marjetka and Pezo, Lato and Sredović-Ignjatović, Ivana and Ignjatović, Ljubiša M. and Savić, Andrija and Jovanović, Uroš D. and Andrić, Velibor",
year = "2016",
abstract = "Two mechanical extraction techniques were used for the extraction of environmentaly interesting components of coal fly ash: shaking, during which the extraction process lasted from 6 up to 24 h, and sonication that lasted from 15 up to 60 min, using water as extractant. The concentration of anions in fly ash extracts was determined by ion chromatography, while atomic absorption spectrometry was used for determination of: As, Pb, Cd, Ni, Cr, Zn, Cu, Fe, Mn and Al. The ultrasonication yielded slightly higher amounts of extracted anions as well as Pb, Al, Mn and Fe cations, while shaking-assisted extraction was more efficient for the Cr, As, Zn and Ni ions. The changes in pH value, particle size distribution within colloid solution, zeta potential and conductivity during ultrasound-assisted extraction were measured in order to explain changes that occur on the surface of fly ash particles contacting water and different processes (adsorption, ion exchange and flocculation) that develop under natural conditions. Principal Component Analysis was used for assessing the effect of observed process parameters. It is essential to evaluate quantity of these elements leachable from coal fly ash into the surface waters in natural conditions in order to prevent contamination of the environment.",
publisher = "Srpsko hemijsko društvo, Beograd",
journal = "JOURNAL OF THE SERBIAN CHEMICAL SOCIETY",
title = "Ultrasound and shacking-assisted water-leaching of anions and cations from fly ash",
pages = "827-813",
number = "7",
volume = "81",
doi = "10.2298/JSC151222027B"
}

Savić-Bisercić, M., Pezo, L., Sredović-Ignjatović, I., Ignjatović, L. M., Savić, A., Jovanović, U. D.,& Andrić, V.. (2016). Ultrasound and shacking-assisted water-leaching of anions and cations from fly ash. in JOURNAL OF THE SERBIAN CHEMICAL SOCIETY
Srpsko hemijsko društvo, Beograd., 81(7), 813-827.
https://doi.org/10.2298/JSC151222027B

Savić-Bisercić M, Pezo L, Sredović-Ignjatović I, Ignjatović LM, Savić A, Jovanović UD, Andrić V. Ultrasound and shacking-assisted water-leaching of anions and cations from fly ash. in JOURNAL OF THE SERBIAN CHEMICAL SOCIETY. 2016;81(7):813-827.
doi:10.2298/JSC151222027B .

Savić-Bisercić, Marjetka, Pezo, Lato, Sredović-Ignjatović, Ivana, Ignjatović, Ljubiša M., Savić, Andrija, Jovanović, Uroš D., Andrić, Velibor, "Ultrasound and shacking-assisted water-leaching of anions and cations from fly ash" in JOURNAL OF THE SERBIAN CHEMICAL SOCIETY, 81, no. 7 (2016):813-827,
https://doi.org/10.2298/JSC151222027B . .

TY  - JOUR
AU  - Tasić, Aleksandra M.
AU  - Sredović-Ignjatović, Ivana
AU  - Ignjatović, Ljubiša M.
AU  - Duranović, Danijel
AU  - Antić, Mališa
PY  - 2016
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/4046
AB  - Three different techniques were applied for the aqueous extraction of anions from coal and fly ash: rotary mixer-and ultrasonic-assisted extraction with different duration time, and microwave-assisted extraction at different temperatures. Validation showed that the ion-chromatographic method was suitable for the analysis of anions in coal and fly ash extracts. The variations in the amounts of anions using different extraction times during rotary-assisted extraction were minimal for all investigated anions. The efficiency of ultrasound-assisted extraction of anions from coal depended on the sonication time and was highest at 30 min. The ultrasound-assisted extraction was less efficient for the extraction of anions from fly ash than rotary-assisted extraction. Increase of temperature in the microwave-assisted extraction had a positive effect on the amounts of all anions extracted from coal and sulphate from fly ash, while the amounts of fluoride and chloride in fly ash extracts decreased. The microwave-assisted extraction of coal at 150 degrees C was compared with standard ASTM methods, and results were in good agreement only for chloride. Changes in the pH value and conductivity during ultrasound-assisted extraction were measured in order to explain changes on the surface of coal particles in contact with water and different processes that occur under environmental conditions.
PB  - Srpsko hemijsko društvo, Beograd
T2  - JOURNAL OF THE SERBIAN CHEMICAL SOCIETY
T1  - Aqueous extraction of anions from coal and fly ash followed by ion-chromatographic determination
EP  - 1453
IS  - 12
SP  - 1441
VL  - 81
DO  - 10.2298/JSC160223086T
ER  - 

@article{
author = "Tasić, Aleksandra M. and Sredović-Ignjatović, Ivana and Ignjatović, Ljubiša M. and Duranović, Danijel and Antić, Mališa",
year = "2016",
abstract = "Three different techniques were applied for the aqueous extraction of anions from coal and fly ash: rotary mixer-and ultrasonic-assisted extraction with different duration time, and microwave-assisted extraction at different temperatures. Validation showed that the ion-chromatographic method was suitable for the analysis of anions in coal and fly ash extracts. The variations in the amounts of anions using different extraction times during rotary-assisted extraction were minimal for all investigated anions. The efficiency of ultrasound-assisted extraction of anions from coal depended on the sonication time and was highest at 30 min. The ultrasound-assisted extraction was less efficient for the extraction of anions from fly ash than rotary-assisted extraction. Increase of temperature in the microwave-assisted extraction had a positive effect on the amounts of all anions extracted from coal and sulphate from fly ash, while the amounts of fluoride and chloride in fly ash extracts decreased. The microwave-assisted extraction of coal at 150 degrees C was compared with standard ASTM methods, and results were in good agreement only for chloride. Changes in the pH value and conductivity during ultrasound-assisted extraction were measured in order to explain changes on the surface of coal particles in contact with water and different processes that occur under environmental conditions.",
publisher = "Srpsko hemijsko društvo, Beograd",
journal = "JOURNAL OF THE SERBIAN CHEMICAL SOCIETY",
title = "Aqueous extraction of anions from coal and fly ash followed by ion-chromatographic determination",
pages = "1453-1441",
number = "12",
volume = "81",
doi = "10.2298/JSC160223086T"
}

Tasić, A. M., Sredović-Ignjatović, I., Ignjatović, L. M., Duranović, D.,& Antić, M.. (2016). Aqueous extraction of anions from coal and fly ash followed by ion-chromatographic determination. in JOURNAL OF THE SERBIAN CHEMICAL SOCIETY
Srpsko hemijsko društvo, Beograd., 81(12), 1441-1453.
https://doi.org/10.2298/JSC160223086T

Tasić AM, Sredović-Ignjatović I, Ignjatović LM, Duranović D, Antić M. Aqueous extraction of anions from coal and fly ash followed by ion-chromatographic determination. in JOURNAL OF THE SERBIAN CHEMICAL SOCIETY. 2016;81(12):1441-1453.
doi:10.2298/JSC160223086T .

Tasić, Aleksandra M., Sredović-Ignjatović, Ivana, Ignjatović, Ljubiša M., Duranović, Danijel, Antić, Mališa, "Aqueous extraction of anions from coal and fly ash followed by ion-chromatographic determination" in JOURNAL OF THE SERBIAN CHEMICAL SOCIETY, 81, no. 12 (2016):1441-1453,
https://doi.org/10.2298/JSC160223086T . .

TY  - JOUR
AU  - Tasić, Aleksandra M.
AU  - Sredović-Ignjatović, Ivana
AU  - Ignjatović, Ljubiša M.
AU  - Ilić, Marija A.
AU  - Antić, Mališa
PY  - 2016
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/4047
AB  - The aim of this paper is to simulate leaching of metals from fly ash in different environmental conditions using ultrasound and microwave-assisted extraction techniques. Single-agent extraction and sequential extraction procedures were used to determine the levels of different metals leaching. The concentration of metals (Al, Fe, Mn, Cd, Co, Cr, Ni, Pb, Cu, As and Be) in fly ash extracts were measured by inductively coupled plasma-atomic emission spectrometry. Single-agent extractions of metals were conducted at sonication times of 10, 20, 30, 40 and 50 min. Single-agent extraction with deionized water was also performed by exposing samples to microwave radiation at temperature of 50 degrees C. The sequential extraction was conducted according to the BCR procedure which was modified and applied to study the partitioning of metals in coal fly ash. The microwave-assisted sequential extraction was performed at different extraction temperatures: 50, 100 and 150 degrees C. The partitioning of metals between the individual fractions was investigated and discussed. The efficiency of the extraction process for each step was examined. In addition, the results of the microwave-assisted sequential extraction are compared to the results obtained by standard ASTM method. The mobility of most elements contained in the fly ash is markedly pH sensitive.
PB  - Srpsko hemijsko društvo, Beograd
T2  - JOURNAL OF THE SERBIAN CHEMICAL SOCIETY
T1  - Comparison of sequential and single extraction in order to estimate the environmental impact of metals from fly ash
EP  - 1096
IS  - 9
SP  - 1081
VL  - 81
DO  - 10.2298/JSC160307038T
ER  - 

@article{
author = "Tasić, Aleksandra M. and Sredović-Ignjatović, Ivana and Ignjatović, Ljubiša M. and Ilić, Marija A. and Antić, Mališa",
year = "2016",
abstract = "The aim of this paper is to simulate leaching of metals from fly ash in different environmental conditions using ultrasound and microwave-assisted extraction techniques. Single-agent extraction and sequential extraction procedures were used to determine the levels of different metals leaching. The concentration of metals (Al, Fe, Mn, Cd, Co, Cr, Ni, Pb, Cu, As and Be) in fly ash extracts were measured by inductively coupled plasma-atomic emission spectrometry. Single-agent extractions of metals were conducted at sonication times of 10, 20, 30, 40 and 50 min. Single-agent extraction with deionized water was also performed by exposing samples to microwave radiation at temperature of 50 degrees C. The sequential extraction was conducted according to the BCR procedure which was modified and applied to study the partitioning of metals in coal fly ash. The microwave-assisted sequential extraction was performed at different extraction temperatures: 50, 100 and 150 degrees C. The partitioning of metals between the individual fractions was investigated and discussed. The efficiency of the extraction process for each step was examined. In addition, the results of the microwave-assisted sequential extraction are compared to the results obtained by standard ASTM method. The mobility of most elements contained in the fly ash is markedly pH sensitive.",
publisher = "Srpsko hemijsko društvo, Beograd",
journal = "JOURNAL OF THE SERBIAN CHEMICAL SOCIETY",
title = "Comparison of sequential and single extraction in order to estimate the environmental impact of metals from fly ash",
pages = "1096-1081",
number = "9",
volume = "81",
doi = "10.2298/JSC160307038T"
}

Tasić, A. M., Sredović-Ignjatović, I., Ignjatović, L. M., Ilić, M. A.,& Antić, M.. (2016). Comparison of sequential and single extraction in order to estimate the environmental impact of metals from fly ash. in JOURNAL OF THE SERBIAN CHEMICAL SOCIETY
Srpsko hemijsko društvo, Beograd., 81(9), 1081-1096.
https://doi.org/10.2298/JSC160307038T

Tasić AM, Sredović-Ignjatović I, Ignjatović LM, Ilić MA, Antić M. Comparison of sequential and single extraction in order to estimate the environmental impact of metals from fly ash. in JOURNAL OF THE SERBIAN CHEMICAL SOCIETY. 2016;81(9):1081-1096.
doi:10.2298/JSC160307038T .

Tasić, Aleksandra M., Sredović-Ignjatović, Ivana, Ignjatović, Ljubiša M., Ilić, Marija A., Antić, Mališa, "Comparison of sequential and single extraction in order to estimate the environmental impact of metals from fly ash" in JOURNAL OF THE SERBIAN CHEMICAL SOCIETY, 81, no. 9 (2016):1081-1096,
https://doi.org/10.2298/JSC160307038T . .

TY  - JOUR
AU  - Tasić, Aleksandra M.
AU  - Sredović-Ignjatović, Ivana
AU  - Ignjatović, Ljubiša M.
AU  - Andjelković, Ivan B.
AU  - Antić, Mališa
AU  - Rajaković, Ljubinka V.
PY  - 2016
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/4163
AB  - This paper presents the extraction of major and trace elements from a coal sample, in deionized water, by using three different extraction techniques. Rotary mixing and ultrasonic extraction were examined for different extraction times, while the microwave-assisted extraction was performed at different temperatures. Metal concentrations (Na, K, Ca, Mg, Al, Fe, Mn, Be, Cd, Co, Cr, Hg, As, Ni, Se, Sb and Pb) in solution were determined employing inductively coupled plasma atomic emission spectrometry; whereas the results obtained for Na, K, Ca and Mg were compared employing ion chromatography. Comparing the rotary-and ultrasonic-assisted extractions, it was shown that the former technique was more efficient for the determination of Fe, Na and Pb, whereas the latter one proved more efficient for the determination of Co and Cr ions. Microwave-assisted extraction was shown to be the most efficient method for all the tested elements in coal. In addition, sequential extraction of the elements was realized using microwave digestion. The results of the sequential extraction experiments indicated associations of investigated elements with a mineral phase and organic matrix. Sequential extraction provided information on possible leaching of As, Cd, Co, Cr, Ni, Pb, Fe and Mn under environmental conditions.
PB  - Srpsko hemijsko društvo, Beograd
T2  - JOURNAL OF THE SERBIAN CHEMICAL SOCIETY
T1  - Investigation of different extraction procedures for the determination of major and trace elements in coal by ICP-AES and ion chromatography
EP  - 417
IS  - 4
SP  - 403
VL  - 81
DO  - 10.2298/JSC150429078T
ER  - 

@article{
author = "Tasić, Aleksandra M. and Sredović-Ignjatović, Ivana and Ignjatović, Ljubiša M. and Andjelković, Ivan B. and Antić, Mališa and Rajaković, Ljubinka V.",
year = "2016",
abstract = "This paper presents the extraction of major and trace elements from a coal sample, in deionized water, by using three different extraction techniques. Rotary mixing and ultrasonic extraction were examined for different extraction times, while the microwave-assisted extraction was performed at different temperatures. Metal concentrations (Na, K, Ca, Mg, Al, Fe, Mn, Be, Cd, Co, Cr, Hg, As, Ni, Se, Sb and Pb) in solution were determined employing inductively coupled plasma atomic emission spectrometry; whereas the results obtained for Na, K, Ca and Mg were compared employing ion chromatography. Comparing the rotary-and ultrasonic-assisted extractions, it was shown that the former technique was more efficient for the determination of Fe, Na and Pb, whereas the latter one proved more efficient for the determination of Co and Cr ions. Microwave-assisted extraction was shown to be the most efficient method for all the tested elements in coal. In addition, sequential extraction of the elements was realized using microwave digestion. The results of the sequential extraction experiments indicated associations of investigated elements with a mineral phase and organic matrix. Sequential extraction provided information on possible leaching of As, Cd, Co, Cr, Ni, Pb, Fe and Mn under environmental conditions.",
publisher = "Srpsko hemijsko društvo, Beograd",
journal = "JOURNAL OF THE SERBIAN CHEMICAL SOCIETY",
title = "Investigation of different extraction procedures for the determination of major and trace elements in coal by ICP-AES and ion chromatography",
pages = "417-403",
number = "4",
volume = "81",
doi = "10.2298/JSC150429078T"
}

Tasić, A. M., Sredović-Ignjatović, I., Ignjatović, L. M., Andjelković, I. B., Antić, M.,& Rajaković, L. V.. (2016). Investigation of different extraction procedures for the determination of major and trace elements in coal by ICP-AES and ion chromatography. in JOURNAL OF THE SERBIAN CHEMICAL SOCIETY
Srpsko hemijsko društvo, Beograd., 81(4), 403-417.
https://doi.org/10.2298/JSC150429078T

Tasić AM, Sredović-Ignjatović I, Ignjatović LM, Andjelković IB, Antić M, Rajaković LV. Investigation of different extraction procedures for the determination of major and trace elements in coal by ICP-AES and ion chromatography. in JOURNAL OF THE SERBIAN CHEMICAL SOCIETY. 2016;81(4):403-417.
doi:10.2298/JSC150429078T .

Tasić, Aleksandra M., Sredović-Ignjatović, Ivana, Ignjatović, Ljubiša M., Andjelković, Ivan B., Antić, Mališa, Rajaković, Ljubinka V., "Investigation of different extraction procedures for the determination of major and trace elements in coal by ICP-AES and ion chromatography" in JOURNAL OF THE SERBIAN CHEMICAL SOCIETY, 81, no. 4 (2016):403-417,
https://doi.org/10.2298/JSC150429078T . .

TY  - JOUR
AU  - Stanisić-Stojić, S.M.
AU  - Ignjatović, Ljubiša M.
AU  - Popov, S.
AU  - Skrivanj, S.
AU  - Djordjević, Aleksandar
AU  - Stojić, A.
PY  - 2016
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/4109
AB  - An experiment was undertaken to evaluate the effect of liquid manure amendment on heavy metal accumulation in wheat and barley. For this purpose, both kinds of seedlings were grown simultaneously in a Petri dish, while wheat seedlings were also grown in pots containing unpolluted agricultural soil. All of the seedlings were irrigated with one of the three prepared solutions: artificial rainwater solution, heavy metal solution and liquid manure solution containing NH4NO3, H3PO4 and KOH along with equal amounts of heavy metals as in the second solution. Twenty days later, 1g of plant tissue was digested with the mixture of HNO3 and H2O2 for ICP-OES/HG-ICP-OES analysis. The results showed that the uptake of arsenic and mercury was highest for both plants grown in a Petri dish. Furthermore, the wheat grown in a Petri dish also had a high content of nickel, cadmium and copper, while the pot-grown wheat contained high amounts of iron and manganese, probably due to the adsorption of nickel, cadmium, copper and mercury on soil phases. The lower uptake of all heavy metals was observed after the amendment of liquid manure, with the exception of manganese in wheat and mercury in all plants.
PB  - Taylor & Francis Ltd, Abingdon
T2  - Plant Biosystems
T1  - Heavy metal accumulation in wheat and barley: The effects of soil presence and liquid manure amendment
EP  - 110
IS  - 1
SP  - 104
VL  - 150
DO  - 10.1080/11263504.2014.976288
ER  - 

@article{
author = "Stanisić-Stojić, S.M. and Ignjatović, Ljubiša M. and Popov, S. and Skrivanj, S. and Djordjević, Aleksandar and Stojić, A.",
year = "2016",
abstract = "An experiment was undertaken to evaluate the effect of liquid manure amendment on heavy metal accumulation in wheat and barley. For this purpose, both kinds of seedlings were grown simultaneously in a Petri dish, while wheat seedlings were also grown in pots containing unpolluted agricultural soil. All of the seedlings were irrigated with one of the three prepared solutions: artificial rainwater solution, heavy metal solution and liquid manure solution containing NH4NO3, H3PO4 and KOH along with equal amounts of heavy metals as in the second solution. Twenty days later, 1g of plant tissue was digested with the mixture of HNO3 and H2O2 for ICP-OES/HG-ICP-OES analysis. The results showed that the uptake of arsenic and mercury was highest for both plants grown in a Petri dish. Furthermore, the wheat grown in a Petri dish also had a high content of nickel, cadmium and copper, while the pot-grown wheat contained high amounts of iron and manganese, probably due to the adsorption of nickel, cadmium, copper and mercury on soil phases. The lower uptake of all heavy metals was observed after the amendment of liquid manure, with the exception of manganese in wheat and mercury in all plants.",
publisher = "Taylor & Francis Ltd, Abingdon",
journal = "Plant Biosystems",
title = "Heavy metal accumulation in wheat and barley: The effects of soil presence and liquid manure amendment",
pages = "110-104",
number = "1",
volume = "150",
doi = "10.1080/11263504.2014.976288"
}

Stanisić-Stojić, S.M., Ignjatović, L. M., Popov, S., Skrivanj, S., Djordjević, A.,& Stojić, A.. (2016). Heavy metal accumulation in wheat and barley: The effects of soil presence and liquid manure amendment. in Plant Biosystems
Taylor & Francis Ltd, Abingdon., 150(1), 104-110.
https://doi.org/10.1080/11263504.2014.976288

Stanisić-Stojić S, Ignjatović LM, Popov S, Skrivanj S, Djordjević A, Stojić A. Heavy metal accumulation in wheat and barley: The effects of soil presence and liquid manure amendment. in Plant Biosystems. 2016;150(1):104-110.
doi:10.1080/11263504.2014.976288 .

Stanisić-Stojić, S.M., Ignjatović, Ljubiša M., Popov, S., Skrivanj, S., Djordjević, Aleksandar, Stojić, A., "Heavy metal accumulation in wheat and barley: The effects of soil presence and liquid manure amendment" in Plant Biosystems, 150, no. 1 (2016):104-110,
https://doi.org/10.1080/11263504.2014.976288 . .

TY  - JOUR
AU  - Sredović-Ignjatović, Ivana
AU  - Onjia, Antonije E.
AU  - Ignjatović, Ljubiša M.
AU  - Todorović, Zaklina N.
AU  - Rajaković, Ljubinka V.
PY  - 2015
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/3706
AB  - Determination of total halogens in coal was investigated with oxygen bomb combustion followed by ion chromatography. Experimental parameters were optimized by fractional factorial design and response surface methodology. Fractional factorial design was employed in screening experiments to evaluate the influence of the oxygen pressure, catalyst, absorption solution, reduction reagent, bomb cooling time, and a combustion aid on the combustion of coal in an oxygen bomb. Response surface methodology was conducted to further refine the results obtained by fractional factorial design and to define parameters for the procedure. The accuracy and precision of combustion with ion chromatography were evaluated by the use of two certified reference materials and by fortified in-house coal standards. The limits of detection and quantification for total halogens were 0.84 and 2.80 milligrams per kilogram, respectively, for 500 milligram samples. Ion chromatography provided relative standard deviations less than 4 percent, recoveries exceeding 95 percent, and was convenient. This method is recommended for routine determination of total halogens in coal because of its reliability.
PB  - Taylor & Francis Inc, Philadelphia
T2  - Analytical Letters
T1  - Experimental Design Optimization of the Determination of Total Halogens in Coal by Combustion-Ion Chromatography
EP  - 2612
IS  - 16
SP  - 2597
VL  - 48
DO  - 10.1080/00032719.2015.1041029
ER  - 

@article{
author = "Sredović-Ignjatović, Ivana and Onjia, Antonije E. and Ignjatović, Ljubiša M. and Todorović, Zaklina N. and Rajaković, Ljubinka V.",
year = "2015",
abstract = "Determination of total halogens in coal was investigated with oxygen bomb combustion followed by ion chromatography. Experimental parameters were optimized by fractional factorial design and response surface methodology. Fractional factorial design was employed in screening experiments to evaluate the influence of the oxygen pressure, catalyst, absorption solution, reduction reagent, bomb cooling time, and a combustion aid on the combustion of coal in an oxygen bomb. Response surface methodology was conducted to further refine the results obtained by fractional factorial design and to define parameters for the procedure. The accuracy and precision of combustion with ion chromatography were evaluated by the use of two certified reference materials and by fortified in-house coal standards. The limits of detection and quantification for total halogens were 0.84 and 2.80 milligrams per kilogram, respectively, for 500 milligram samples. Ion chromatography provided relative standard deviations less than 4 percent, recoveries exceeding 95 percent, and was convenient. This method is recommended for routine determination of total halogens in coal because of its reliability.",
publisher = "Taylor & Francis Inc, Philadelphia",
journal = "Analytical Letters",
title = "Experimental Design Optimization of the Determination of Total Halogens in Coal by Combustion-Ion Chromatography",
pages = "2612-2597",
number = "16",
volume = "48",
doi = "10.1080/00032719.2015.1041029"
}

Sredović-Ignjatović, I., Onjia, A. E., Ignjatović, L. M., Todorović, Z. N.,& Rajaković, L. V.. (2015). Experimental Design Optimization of the Determination of Total Halogens in Coal by Combustion-Ion Chromatography. in Analytical Letters
Taylor & Francis Inc, Philadelphia., 48(16), 2597-2612.
https://doi.org/10.1080/00032719.2015.1041029

Sredović-Ignjatović I, Onjia AE, Ignjatović LM, Todorović ZN, Rajaković LV. Experimental Design Optimization of the Determination of Total Halogens in Coal by Combustion-Ion Chromatography. in Analytical Letters. 2015;48(16):2597-2612.
doi:10.1080/00032719.2015.1041029 .

Sredović-Ignjatović, Ivana, Onjia, Antonije E., Ignjatović, Ljubiša M., Todorović, Zaklina N., Rajaković, Ljubinka V., "Experimental Design Optimization of the Determination of Total Halogens in Coal by Combustion-Ion Chromatography" in Analytical Letters, 48, no. 16 (2015):2597-2612,
https://doi.org/10.1080/00032719.2015.1041029 . .

TY  - JOUR
AU  - Rajković, Miloš
AU  - Sredović-Ignjatović, Ivana
AU  - Ignjatović, Ljubiša M.
AU  - Nedović, Viktor
AU  - Prijić, Slobodan M.
PY  - 2015
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/3896
AB  - In order to control the quality of beer and raw materials for production of beer in Belgrade Beer Industry (BIP), water is analyzed (city, technological and demineralized water). Measurements of pH values indicated the increased pH values in the sample of technological water, which had no impact on wort hopping, since the tested samples of wort, young beer and final product had a pH value within the expected range. After processing city water, a sample of technological water was found with increased carbonate hardness, which is caused by the increased content of sodium hydrogen carbonate. Analysing the titration alkalinity, titration acidity and buffering power, it was found that the alkalinity was decreasing which is in accordance with the determination of pH values of wort and beer samples (young beer and final product). Analyzing the content of anions and cations in the examined water samples, it has been shown that the concentration of these examinated anions (Cl-, NO3-, SO42- and PO43-) and cations (NH4+, Na+, K+, Ca2+, Mg2+) are within the limits prescribed by the Regulations on hygienic safety of drinking water, and thus by the Regulations of quality and other requirements for beer. The contents of anions in wort and beer samples (young beer and final product) were determined by ion chromatography method. The contents of sulphate and nitrate ions were within the recommended limits. The concentration of chloride ions was above 150 mg/dm3, which may have an impact on the sensory properties of beer, while changes in the content of phosphate ions were insignificant.
AB  - U cilju kontrole kvaliteta piva i sirovina za proizvodnju piva u Beogradskoj industriji piva (BIP) analizirana je voda (gradska, tehnološka i demineralizovana). Merenja pH vrednosti ukazala su na povećanu vrednost pH u uzorku tehnološke vode, ali to nije imalo uticaja na ukomljavanje slada pošto su ispitivani uzorci sladovine, kao i uzorci mladog piva i gotovog proizvoda imali vrednost pH u očekivanom opsegu. Obradom gradske vode dobio se uzorak tehnološke vode sa povećanom karbonatnom tvrdoćom, koja je prouzrokovana povećanim sadržajem natrijum-hidrogenkarbonata. Analizom titracionog alkaliteta, titracionog aciditeta, i moći puferovanja, utvrđeno je da se alkalitet smanjuje što je u saglasnosti i sa određivanjem pH vrednosti uzoraka sladovine i piva (mladog i gotovog proizvoda). Analiza sadržaja anjona i katjona u ispitivanim uzorcima vode, pokazala je da je koncentracija ispitivanih anjona (Cl-, NO3-, SO42- i PO43-) i katjona (NH4+, Na+, K+, Ca2+, Mg2+) u granicama propisanim Pravilnikom o higijenskoj ispravnosti vode za piće, a time i sa Pravilnikom o kvalitetu i drugim zahtevima za pivo. Sadržaj anjona u uzorcima sladovine i piva (mladog i gotovog proizvoda) određen je metodom jonske hromatografije. Sadržaj sulfat- i nitrat-jona je bio u preporučenim granicama. Koncentracija hlorid-jona je bila iznad 150 mg/dm3, što može imati uticaja na senzorne karakteristike piva, dok je promena sadržaja fosfat-jona bila neznatna.
PB  - Univerzitet u Beogradu - Poljoprivredni fakultet, Beograd
T2  - Journal of Agricultural Sciences (Belgrade)
T1  - An application of classical and instrumental methods of analysis in quality control of beer
T1  - Primena klasičnih i instrumentalnih metoda analize u kontroli kvaliteta piva
EP  - 503
IS  - 4
SP  - 477
VL  - 60
DO  - 10.2298/JAS1504477R
ER  - 

@article{
author = "Rajković, Miloš and Sredović-Ignjatović, Ivana and Ignjatović, Ljubiša M. and Nedović, Viktor and Prijić, Slobodan M.",
year = "2015",
abstract = "In order to control the quality of beer and raw materials for production of beer in Belgrade Beer Industry (BIP), water is analyzed (city, technological and demineralized water). Measurements of pH values indicated the increased pH values in the sample of technological water, which had no impact on wort hopping, since the tested samples of wort, young beer and final product had a pH value within the expected range. After processing city water, a sample of technological water was found with increased carbonate hardness, which is caused by the increased content of sodium hydrogen carbonate. Analysing the titration alkalinity, titration acidity and buffering power, it was found that the alkalinity was decreasing which is in accordance with the determination of pH values of wort and beer samples (young beer and final product). Analyzing the content of anions and cations in the examined water samples, it has been shown that the concentration of these examinated anions (Cl-, NO3-, SO42- and PO43-) and cations (NH4+, Na+, K+, Ca2+, Mg2+) are within the limits prescribed by the Regulations on hygienic safety of drinking water, and thus by the Regulations of quality and other requirements for beer. The contents of anions in wort and beer samples (young beer and final product) were determined by ion chromatography method. The contents of sulphate and nitrate ions were within the recommended limits. The concentration of chloride ions was above 150 mg/dm3, which may have an impact on the sensory properties of beer, while changes in the content of phosphate ions were insignificant., U cilju kontrole kvaliteta piva i sirovina za proizvodnju piva u Beogradskoj industriji piva (BIP) analizirana je voda (gradska, tehnološka i demineralizovana). Merenja pH vrednosti ukazala su na povećanu vrednost pH u uzorku tehnološke vode, ali to nije imalo uticaja na ukomljavanje slada pošto su ispitivani uzorci sladovine, kao i uzorci mladog piva i gotovog proizvoda imali vrednost pH u očekivanom opsegu. Obradom gradske vode dobio se uzorak tehnološke vode sa povećanom karbonatnom tvrdoćom, koja je prouzrokovana povećanim sadržajem natrijum-hidrogenkarbonata. Analizom titracionog alkaliteta, titracionog aciditeta, i moći puferovanja, utvrđeno je da se alkalitet smanjuje što je u saglasnosti i sa određivanjem pH vrednosti uzoraka sladovine i piva (mladog i gotovog proizvoda). Analiza sadržaja anjona i katjona u ispitivanim uzorcima vode, pokazala je da je koncentracija ispitivanih anjona (Cl-, NO3-, SO42- i PO43-) i katjona (NH4+, Na+, K+, Ca2+, Mg2+) u granicama propisanim Pravilnikom o higijenskoj ispravnosti vode za piće, a time i sa Pravilnikom o kvalitetu i drugim zahtevima za pivo. Sadržaj anjona u uzorcima sladovine i piva (mladog i gotovog proizvoda) određen je metodom jonske hromatografije. Sadržaj sulfat- i nitrat-jona je bio u preporučenim granicama. Koncentracija hlorid-jona je bila iznad 150 mg/dm3, što može imati uticaja na senzorne karakteristike piva, dok je promena sadržaja fosfat-jona bila neznatna.",
publisher = "Univerzitet u Beogradu - Poljoprivredni fakultet, Beograd",
journal = "Journal of Agricultural Sciences (Belgrade)",
title = "An application of classical and instrumental methods of analysis in quality control of beer, Primena klasičnih i instrumentalnih metoda analize u kontroli kvaliteta piva",
pages = "503-477",
number = "4",
volume = "60",
doi = "10.2298/JAS1504477R"
}

Rajković, M., Sredović-Ignjatović, I., Ignjatović, L. M., Nedović, V.,& Prijić, S. M.. (2015). An application of classical and instrumental methods of analysis in quality control of beer. in Journal of Agricultural Sciences (Belgrade)
Univerzitet u Beogradu - Poljoprivredni fakultet, Beograd., 60(4), 477-503.
https://doi.org/10.2298/JAS1504477R

Rajković M, Sredović-Ignjatović I, Ignjatović LM, Nedović V, Prijić SM. An application of classical and instrumental methods of analysis in quality control of beer. in Journal of Agricultural Sciences (Belgrade). 2015;60(4):477-503.
doi:10.2298/JAS1504477R .

Rajković, Miloš, Sredović-Ignjatović, Ivana, Ignjatović, Ljubiša M., Nedović, Viktor, Prijić, Slobodan M., "An application of classical and instrumental methods of analysis in quality control of beer" in Journal of Agricultural Sciences (Belgrade), 60, no. 4 (2015):477-503,
https://doi.org/10.2298/JAS1504477R . .

TY  - JOUR
AU  - Rajković, Miloš
AU  - Sredović-Ignjatović, Ivana
AU  - Ignjatović, Ljubiša M.
AU  - Nedović, Viktor
AU  - Prijić, Slobodan
PY  - 2015
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/3923
AB  - In order to control the quality of beer and raw materials for beer production, methods as ion chromatography (IC) and atomic absorption spectrophotometry (AAS) were applied. Water was analyzed as a raw material for beer production (urban, technological and demineralized water). Measurements of pH values indicated the increased pH values in the sample of tehnological water, but it had no impact on wort hopping, since the tested samples of wort, young beer and final product had a pH value in the expected range. Analyzing the content of anions and cations in the examinated water samples, it is shown that the concentration of these examinated anions (Cl- , NO3-, SO42- and PO43-) and cations (NH4+, Na+, K+, Ca2+, Mg2+), as and microelements (Fe, Cu i Zn) are within the limits prescribed by the Regulations on hygienic safety of drinking water and the Regulations of quality and other requirements for beer. Investigating contents of anions in samples of wort and beer (young beer and final product) showed that the contents of SO42- and NO3- ions were within recommended limits and the concentration of Cl- ions was above 150 mg/dm3, which may have an impact on sensory characteristics of beer, while changes in the content of PO43- ions were insignificant. Since AAS method is a standard method for analyzing content of alkaline and alkaline earth metals, the results obtained by this method in beer samples are taken as a referent results and according to them an analyse was performed and results obtained by IC method were compared. Results of the determination of Na, Ca and Mg in examinated water samples have shown variations, but both methods have shown the increased content of Na in demineralized water. The contents of alkaline and alkaline earth metals in wort and beer (young beer and final product) have shown that the results obtained by these two methods were in agreement.
AB  - U cilju kontrole kvaliteta piva i sirovina za proizvodnju piva u Beogradskoj industriji piva (BIP) primenjene su metode jonske hromatografije (IC) i atomske apsorpcione spektrofotometrije (AAS). Od sirovina za proizvodnju piva analizirana je voda (gradska, tehnološka i demineralizovana). Merenja pH vrednosti ukazala su na povećanu pH vrednost u uzorku tehnološke vode, ali to nije imalo uticaj na ukomljavanje slada pošto su ispitivani uzorci sladovine, kao i uzorci mladog piva i gotovog proizvoda imali pH vrednost u očekivanom opsegu. Analiza sadržaja anjona i katjona u ispitivanim uzorcima vode, pokazala je da je koncentracija ispitivanih anjona (Cl-, NO3 -, SO4 2- i PO4 3-) i katjona (NH4 +, Na+, K+, Ca2+, Mg2+), kao i mikroelemenata (Fe, Cu i Zn) u granicama propisanim Pravilnikom o higijenskoj ispravnosti vode za piće i Pravilnikom o kvalitetu i drugim zahtevima za pivo. Ispitivanje sadržaja anjona u uzorcima sladovine i piva (mladog i gotovog proizvoda) pokazalo je da je sadržaj SO4 2-- i NO3 --jona bio u preporučenim granicama, koncentracija Cl-- jona bila je iznad 150 mg/dm3, što može imati uticaj na senzorne karakteristike piva, dok je promena sadržaja PO4 3--jona bila neznatna. Pošto je AAS standardna metoda za analizu sadržaja alkalnih i zemnoalkalnih metala, rezultati dobijeni ovom metodom u uzorcima piva uzeti su kao referentni i prema njima je izvršena analiza i upoređivanje rezultata dobijenih metodom IC. Rezultati određivanja Na, Ca i Mg u ispitivanim uzorcima vode, pokazala su odstupanja, ali su obe metode ukazale na povećan sadržaj natrijuma u demineralizovanoj vodi. Sadržaj alkalnih i zemnoalkalnih metala u uzorcima sladovine i piva (mladog i gotovog proizvoda) ukazao je da su rezultati dobijeni ovim dvema metodama bili u saglasnosti.
PB  - Inženjersko društvo za koroziju, Beograd
T2  - Zaštita materijala
T1  - Determination of cations and metals in samples of beer and raw materials for beer production by ion chromatography (IC) and atomic absorption spectrophotometry (AAS) methods
T1  - Određivanje katjona i metala u pivu i sirovinama za proizvodnju piva metodama jonske hromatografije (IC) i atomske apsorpcione spektrofotometrije (AAS)
EP  - 521
IS  - 4
SP  - 510
VL  - 56
DO  - 10.5937/ZasMat1504510R
ER  - 

@article{
author = "Rajković, Miloš and Sredović-Ignjatović, Ivana and Ignjatović, Ljubiša M. and Nedović, Viktor and Prijić, Slobodan",
year = "2015",
abstract = "In order to control the quality of beer and raw materials for beer production, methods as ion chromatography (IC) and atomic absorption spectrophotometry (AAS) were applied. Water was analyzed as a raw material for beer production (urban, technological and demineralized water). Measurements of pH values indicated the increased pH values in the sample of tehnological water, but it had no impact on wort hopping, since the tested samples of wort, young beer and final product had a pH value in the expected range. Analyzing the content of anions and cations in the examinated water samples, it is shown that the concentration of these examinated anions (Cl- , NO3-, SO42- and PO43-) and cations (NH4+, Na+, K+, Ca2+, Mg2+), as and microelements (Fe, Cu i Zn) are within the limits prescribed by the Regulations on hygienic safety of drinking water and the Regulations of quality and other requirements for beer. Investigating contents of anions in samples of wort and beer (young beer and final product) showed that the contents of SO42- and NO3- ions were within recommended limits and the concentration of Cl- ions was above 150 mg/dm3, which may have an impact on sensory characteristics of beer, while changes in the content of PO43- ions were insignificant. Since AAS method is a standard method for analyzing content of alkaline and alkaline earth metals, the results obtained by this method in beer samples are taken as a referent results and according to them an analyse was performed and results obtained by IC method were compared. Results of the determination of Na, Ca and Mg in examinated water samples have shown variations, but both methods have shown the increased content of Na in demineralized water. The contents of alkaline and alkaline earth metals in wort and beer (young beer and final product) have shown that the results obtained by these two methods were in agreement., U cilju kontrole kvaliteta piva i sirovina za proizvodnju piva u Beogradskoj industriji piva (BIP) primenjene su metode jonske hromatografije (IC) i atomske apsorpcione spektrofotometrije (AAS). Od sirovina za proizvodnju piva analizirana je voda (gradska, tehnološka i demineralizovana). Merenja pH vrednosti ukazala su na povećanu pH vrednost u uzorku tehnološke vode, ali to nije imalo uticaj na ukomljavanje slada pošto su ispitivani uzorci sladovine, kao i uzorci mladog piva i gotovog proizvoda imali pH vrednost u očekivanom opsegu. Analiza sadržaja anjona i katjona u ispitivanim uzorcima vode, pokazala je da je koncentracija ispitivanih anjona (Cl-, NO3 -, SO4 2- i PO4 3-) i katjona (NH4 +, Na+, K+, Ca2+, Mg2+), kao i mikroelemenata (Fe, Cu i Zn) u granicama propisanim Pravilnikom o higijenskoj ispravnosti vode za piće i Pravilnikom o kvalitetu i drugim zahtevima za pivo. Ispitivanje sadržaja anjona u uzorcima sladovine i piva (mladog i gotovog proizvoda) pokazalo je da je sadržaj SO4 2-- i NO3 --jona bio u preporučenim granicama, koncentracija Cl-- jona bila je iznad 150 mg/dm3, što može imati uticaj na senzorne karakteristike piva, dok je promena sadržaja PO4 3--jona bila neznatna. Pošto je AAS standardna metoda za analizu sadržaja alkalnih i zemnoalkalnih metala, rezultati dobijeni ovom metodom u uzorcima piva uzeti su kao referentni i prema njima je izvršena analiza i upoređivanje rezultata dobijenih metodom IC. Rezultati određivanja Na, Ca i Mg u ispitivanim uzorcima vode, pokazala su odstupanja, ali su obe metode ukazale na povećan sadržaj natrijuma u demineralizovanoj vodi. Sadržaj alkalnih i zemnoalkalnih metala u uzorcima sladovine i piva (mladog i gotovog proizvoda) ukazao je da su rezultati dobijeni ovim dvema metodama bili u saglasnosti.",
publisher = "Inženjersko društvo za koroziju, Beograd",
journal = "Zaštita materijala",
title = "Determination of cations and metals in samples of beer and raw materials for beer production by ion chromatography (IC) and atomic absorption spectrophotometry (AAS) methods, Određivanje katjona i metala u pivu i sirovinama za proizvodnju piva metodama jonske hromatografije (IC) i atomske apsorpcione spektrofotometrije (AAS)",
pages = "521-510",
number = "4",
volume = "56",
doi = "10.5937/ZasMat1504510R"
}

Rajković, M., Sredović-Ignjatović, I., Ignjatović, L. M., Nedović, V.,& Prijić, S.. (2015). Determination of cations and metals in samples of beer and raw materials for beer production by ion chromatography (IC) and atomic absorption spectrophotometry (AAS) methods. in Zaštita materijala
Inženjersko društvo za koroziju, Beograd., 56(4), 510-521.
https://doi.org/10.5937/ZasMat1504510R

Rajković M, Sredović-Ignjatović I, Ignjatović LM, Nedović V, Prijić S. Determination of cations and metals in samples of beer and raw materials for beer production by ion chromatography (IC) and atomic absorption spectrophotometry (AAS) methods. in Zaštita materijala. 2015;56(4):510-521.
doi:10.5937/ZasMat1504510R .

Rajković, Miloš, Sredović-Ignjatović, Ivana, Ignjatović, Ljubiša M., Nedović, Viktor, Prijić, Slobodan, "Determination of cations and metals in samples of beer and raw materials for beer production by ion chromatography (IC) and atomic absorption spectrophotometry (AAS) methods" in Zaštita materijala, 56, no. 4 (2015):510-521,
https://doi.org/10.5937/ZasMat1504510R . .

TY  - JOUR
AU  - Ignjatović, Ljubiša M.
AU  - Tasić, Aleksandra M.
AU  - Sredović-Ignjatović, Ivana
AU  - Nastasović, Aleksandra B.
PY  - 2015
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/3924
AB  - This work reports results on phenol adsorption from aqueous solution by porous copolymers based on glycidyl methacrylate: two samples of macroporous crosslinked poly(glycidyl methacrylate-co-ethylene glycol dimethacrylate), were synthetized by suspension copolymerisation with ethylene glycol dimethacrylate. In addition, the two copolymer samples were functionalized with ethylene diamine. The amounts of adsorbed phenol were presented in the form of adsorptions isotherms, which were interpreted using Langmuir, Freundlich and Sips' equations. The first was found to express high level of agreement with experimental data. Phenol adsorption indicate the homogeneous distribution of active sites present on the investigated polymers. It was found that adsorption of phenol on copolymers is fast and depends on the presence of amino groups and on the pore size. From the obtained results, it was possible to distinguish macroporous polymer as a material which possesses the capacity for adsorption of phenol comparable to that of activated carbon.
AB  - Ovaj rad se bavi proučavanjem adsorpcije fenola iz vodenih rastvora na kopolimerima različitih poroznih karakteristika i polarnosti. Korišćeni adsorbensi se baziraju na glicidil metakrilatu: dva uzorka makroporoznog poli(glicidil metakrilat-co-etilen glikol dimethakrilat) su sintetisani suspenzionom kopolimerizacijom sa etilen glikol dimetakrilatom. Dodatno, dva kopolimera su funkcionalizovani sa etilen diaminom. Količina adsorbovanog fenola je predstavljena u vidu adsorpcionih izotermi, koje su interpretirane korišćenjem Langmuir-ove, Freundlich-ove i Sips-ove jednačine: prva od ovih daje visok nivo slaganja sa eksperimentalnim podacima. Adsorpcija fenola ukazuje na homogenu raspodelu aktivnih mesta prisutnih u ispitivanim polimernim sistemima. Rezultati dobijeni u ovom istraživanju pokazuju da adsorpcija fenola na ispitivanim kopolimerima zavisi od prisustva amino grupa i od veličine pora. Adsorpcija fenola iz vodenih rastvora je brza u slučaju svih korišćenih adsorbenasa. Na osnovu dobivenih rezultata, može se zaključiti da su makroporozni polimeri materijali čije je adsorpcioni kapacitet za fenol uporediv sa onim koji ima aktivni ugalj.
PB  - Inženjersko društvo za koroziju, Beograd
T2  - Zaštita materijala
T1  - Investigation of phenol adsorption on macroporous polymeric adsorbents
T1  - Ispitivanje adsorpcije fenola na makroporoznim polimernim adsorbensima
EP  - 205
IS  - 2
SP  - 199
VL  - 56
DO  - 10.5937/ZasMat1502199I
ER  - 

@article{
author = "Ignjatović, Ljubiša M. and Tasić, Aleksandra M. and Sredović-Ignjatović, Ivana and Nastasović, Aleksandra B.",
year = "2015",
abstract = "This work reports results on phenol adsorption from aqueous solution by porous copolymers based on glycidyl methacrylate: two samples of macroporous crosslinked poly(glycidyl methacrylate-co-ethylene glycol dimethacrylate), were synthetized by suspension copolymerisation with ethylene glycol dimethacrylate. In addition, the two copolymer samples were functionalized with ethylene diamine. The amounts of adsorbed phenol were presented in the form of adsorptions isotherms, which were interpreted using Langmuir, Freundlich and Sips' equations. The first was found to express high level of agreement with experimental data. Phenol adsorption indicate the homogeneous distribution of active sites present on the investigated polymers. It was found that adsorption of phenol on copolymers is fast and depends on the presence of amino groups and on the pore size. From the obtained results, it was possible to distinguish macroporous polymer as a material which possesses the capacity for adsorption of phenol comparable to that of activated carbon., Ovaj rad se bavi proučavanjem adsorpcije fenola iz vodenih rastvora na kopolimerima različitih poroznih karakteristika i polarnosti. Korišćeni adsorbensi se baziraju na glicidil metakrilatu: dva uzorka makroporoznog poli(glicidil metakrilat-co-etilen glikol dimethakrilat) su sintetisani suspenzionom kopolimerizacijom sa etilen glikol dimetakrilatom. Dodatno, dva kopolimera su funkcionalizovani sa etilen diaminom. Količina adsorbovanog fenola je predstavljena u vidu adsorpcionih izotermi, koje su interpretirane korišćenjem Langmuir-ove, Freundlich-ove i Sips-ove jednačine: prva od ovih daje visok nivo slaganja sa eksperimentalnim podacima. Adsorpcija fenola ukazuje na homogenu raspodelu aktivnih mesta prisutnih u ispitivanim polimernim sistemima. Rezultati dobijeni u ovom istraživanju pokazuju da adsorpcija fenola na ispitivanim kopolimerima zavisi od prisustva amino grupa i od veličine pora. Adsorpcija fenola iz vodenih rastvora je brza u slučaju svih korišćenih adsorbenasa. Na osnovu dobivenih rezultata, može se zaključiti da su makroporozni polimeri materijali čije je adsorpcioni kapacitet za fenol uporediv sa onim koji ima aktivni ugalj.",
publisher = "Inženjersko društvo za koroziju, Beograd",
journal = "Zaštita materijala",
title = "Investigation of phenol adsorption on macroporous polymeric adsorbents, Ispitivanje adsorpcije fenola na makroporoznim polimernim adsorbensima",
pages = "205-199",
number = "2",
volume = "56",
doi = "10.5937/ZasMat1502199I"
}

Ignjatović, L. M., Tasić, A. M., Sredović-Ignjatović, I.,& Nastasović, A. B.. (2015). Investigation of phenol adsorption on macroporous polymeric adsorbents. in Zaštita materijala
Inženjersko društvo za koroziju, Beograd., 56(2), 199-205.
https://doi.org/10.5937/ZasMat1502199I

Ignjatović LM, Tasić AM, Sredović-Ignjatović I, Nastasović AB. Investigation of phenol adsorption on macroporous polymeric adsorbents. in Zaštita materijala. 2015;56(2):199-205.
doi:10.5937/ZasMat1502199I .

Ignjatović, Ljubiša M., Tasić, Aleksandra M., Sredović-Ignjatović, Ivana, Nastasović, Aleksandra B., "Investigation of phenol adsorption on macroporous polymeric adsorbents" in Zaštita materijala, 56, no. 2 (2015):199-205,
https://doi.org/10.5937/ZasMat1502199I . .

TY  - JOUR
AU  - Sredović-Ignjatović, Ivana
AU  - Onjia, Antonije E.
AU  - Ignjatović, Ljubiša M.
AU  - Todorović, Zaklina N.
AU  - Rajaković, Ljubinka V.
PY  - 2015
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/5764
AB  - Determination of total halogens in coal was investigated with oxygen bomb combustion followed by ion chromatography. Experimental parameters were optimized by fractional factorial design and response surface methodology. Fractional factorial design was employed in screening experiments to evaluate the influence of the oxygen pressure, catalyst, absorption solution, reduction reagent, bomb cooling time, and a combustion aid on the combustion of coal in an oxygen bomb. Response surface methodology was conducted to further refine the results obtained by fractional factorial design and to define parameters for the procedure. The accuracy and precision of combustion with ion chromatography were evaluated by the use of two certified reference materials and by fortified in-house coal standards. The limits of detection and quantification for total halogens were 0.84 and 2.80 milligrams per kilogram, respectively, for 500 milligram samples. Ion chromatography provided relative standard deviations less than 4 percent, recoveries exceeding 95 percent, and was convenient. This method is recommended for routine determination of total halogens in coal because of its reliability.
PB  - Taylor & Francis Inc, Philadelphia
T2  - Analytical Letters
T1  - Experimental Design Optimization of the Determination of Total Halogens in Coal by Combustion-Ion Chromatography
EP  - 2612
IS  - 16
SP  - 2597
VL  - 48
DO  - 10.1080/00032719.2015.1041029
ER  - 

@article{
author = "Sredović-Ignjatović, Ivana and Onjia, Antonije E. and Ignjatović, Ljubiša M. and Todorović, Zaklina N. and Rajaković, Ljubinka V.",
year = "2015",
abstract = "Determination of total halogens in coal was investigated with oxygen bomb combustion followed by ion chromatography. Experimental parameters were optimized by fractional factorial design and response surface methodology. Fractional factorial design was employed in screening experiments to evaluate the influence of the oxygen pressure, catalyst, absorption solution, reduction reagent, bomb cooling time, and a combustion aid on the combustion of coal in an oxygen bomb. Response surface methodology was conducted to further refine the results obtained by fractional factorial design and to define parameters for the procedure. The accuracy and precision of combustion with ion chromatography were evaluated by the use of two certified reference materials and by fortified in-house coal standards. The limits of detection and quantification for total halogens were 0.84 and 2.80 milligrams per kilogram, respectively, for 500 milligram samples. Ion chromatography provided relative standard deviations less than 4 percent, recoveries exceeding 95 percent, and was convenient. This method is recommended for routine determination of total halogens in coal because of its reliability.",
publisher = "Taylor & Francis Inc, Philadelphia",
journal = "Analytical Letters",
title = "Experimental Design Optimization of the Determination of Total Halogens in Coal by Combustion-Ion Chromatography",
pages = "2612-2597",
number = "16",
volume = "48",
doi = "10.1080/00032719.2015.1041029"
}

Sredović-Ignjatović, I., Onjia, A. E., Ignjatović, L. M., Todorović, Z. N.,& Rajaković, L. V.. (2015). Experimental Design Optimization of the Determination of Total Halogens in Coal by Combustion-Ion Chromatography. in Analytical Letters
Taylor & Francis Inc, Philadelphia., 48(16), 2597-2612.
https://doi.org/10.1080/00032719.2015.1041029

Sredović-Ignjatović I, Onjia AE, Ignjatović LM, Todorović ZN, Rajaković LV. Experimental Design Optimization of the Determination of Total Halogens in Coal by Combustion-Ion Chromatography. in Analytical Letters. 2015;48(16):2597-2612.
doi:10.1080/00032719.2015.1041029 .

Sredović-Ignjatović, Ivana, Onjia, Antonije E., Ignjatović, Ljubiša M., Todorović, Zaklina N., Rajaković, Ljubinka V., "Experimental Design Optimization of the Determination of Total Halogens in Coal by Combustion-Ion Chromatography" in Analytical Letters, 48, no. 16 (2015):2597-2612,
https://doi.org/10.1080/00032719.2015.1041029 . .

TY  - JOUR
AU  - Stanišić, Svetlana M.
AU  - Ignjatović, Ljubiša M.
AU  - Stević, Milica C.
AU  - Djordjević, Aleksandar
PY  - 2011
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/2639
AB  - Three different extraction techniques were used for aqueous extraction of anions from soil of the type Ranker that was sampled from a serpentine site. The first technique involved the use of a rotary mixer (rotary mixer assist- ed extraction), the second, a microwave digestion system (microwave assisted extraction), with different extraction temperatures for every cycle during the procedure as follows: 50, 100 and 150°C. An ultrasonic bath (ultrasonic assisted extraction) was used for the last technique in which the durations of the extraction process were: 10, 20, 30, 40 and 50 min. The concentrations of inorganic anions in the soil extracts after filtration were determined by ion chromatography. The results showed that the microwave-assisted extraction was highly efficient, giving, at a temperature of 150°C, several times higher amounts of extracted anions in water than the other two techniques. Moreover, the extracted amounts of anions obtained by means of an ultrasonic bath with an extraction time ranging from 10 to 50 min were similar to those obtained by means of the rotary mixer with an extraction time of 22 h. However, extraction using the rotary mixer was more reliable, since the extracted amounts of anions obtained by means of an ultrasonic bath do not correlate with prolongation of the extraction time.
AB  - Vršena je ekstrakcija anjona u dejonizovanoj vodi, iz uzorka zemljišta tipa serpentinita, upotrebom tri različite tehnike ekstrakcije: upotrebom rotacione mućkalice u trajanju od 22 sata, mikrotalasne pećnice, uz promenu temperature za svaki od ciklusa ekstrakcije: 50, 100 i 150°C i ultrazvučne kade, sa ekstrakcionim vremenom od 10, 20, 30, 40 i 50 min. U ekstraktu zemljišta dobijenom nakon filtracije su određivane koncentracije neorganskih anjona metodom jonske hromatografije. Izvršena su poređenja rezultata za svaku od tehnika ekstrakcije, čime je zaključeno da se ekstrakcija potpomognuta mikrotalasima pokazala kao veoma efikasna, dajući na temperaturi od 150°C nekoliko puta veću količinu ekstrahovanih anjona u poređenju sa druge dve tehnike ekstrakcije. Količina ekstrahovanih anjona upotrebom ultrazvučne kade, sa ekstrakcionim vremenom u rasponu od 10 do 50 min, je bila približna količini dobijenoj ekstrakcijom koja koristi rotacionu mućkalicu, u trajanju od 22 h. Ipak, ekstrakciona tehnika koja koristi rotacionu mućkalicu se pokazala kao pouzdanija od tehnike ekstrakcije potpomognute ultrazvukom, jer količina ekstrahovanih anjona pri ekstrakciji uz pomoć ultrazvuka nije u korelaciji sa produženjem ekstrakcionog vremena.
PB  - Srpsko hemijsko društvo, Beograd
T2  - JOURNAL OF THE SERBIAN CHEMICAL SOCIETY
T1  - A comparison of sample extraction procedures for the determination of inorganic anions in soil by ion chromatography
T1  - Uticaj pripreme uzorka zemljišta na određivanje neorganskih anjona metodom jonske hromatografije
EP  - 780
IS  - 5
SP  - 769
VL  - 76
DO  - 10.2298/JSC100911069S
ER  - 

@article{
author = "Stanišić, Svetlana M. and Ignjatović, Ljubiša M. and Stević, Milica C. and Djordjević, Aleksandar",
year = "2011",
abstract = "Three different extraction techniques were used for aqueous extraction of anions from soil of the type Ranker that was sampled from a serpentine site. The first technique involved the use of a rotary mixer (rotary mixer assist- ed extraction), the second, a microwave digestion system (microwave assisted extraction), with different extraction temperatures for every cycle during the procedure as follows: 50, 100 and 150°C. An ultrasonic bath (ultrasonic assisted extraction) was used for the last technique in which the durations of the extraction process were: 10, 20, 30, 40 and 50 min. The concentrations of inorganic anions in the soil extracts after filtration were determined by ion chromatography. The results showed that the microwave-assisted extraction was highly efficient, giving, at a temperature of 150°C, several times higher amounts of extracted anions in water than the other two techniques. Moreover, the extracted amounts of anions obtained by means of an ultrasonic bath with an extraction time ranging from 10 to 50 min were similar to those obtained by means of the rotary mixer with an extraction time of 22 h. However, extraction using the rotary mixer was more reliable, since the extracted amounts of anions obtained by means of an ultrasonic bath do not correlate with prolongation of the extraction time., Vršena je ekstrakcija anjona u dejonizovanoj vodi, iz uzorka zemljišta tipa serpentinita, upotrebom tri različite tehnike ekstrakcije: upotrebom rotacione mućkalice u trajanju od 22 sata, mikrotalasne pećnice, uz promenu temperature za svaki od ciklusa ekstrakcije: 50, 100 i 150°C i ultrazvučne kade, sa ekstrakcionim vremenom od 10, 20, 30, 40 i 50 min. U ekstraktu zemljišta dobijenom nakon filtracije su određivane koncentracije neorganskih anjona metodom jonske hromatografije. Izvršena su poređenja rezultata za svaku od tehnika ekstrakcije, čime je zaključeno da se ekstrakcija potpomognuta mikrotalasima pokazala kao veoma efikasna, dajući na temperaturi od 150°C nekoliko puta veću količinu ekstrahovanih anjona u poređenju sa druge dve tehnike ekstrakcije. Količina ekstrahovanih anjona upotrebom ultrazvučne kade, sa ekstrakcionim vremenom u rasponu od 10 do 50 min, je bila približna količini dobijenoj ekstrakcijom koja koristi rotacionu mućkalicu, u trajanju od 22 h. Ipak, ekstrakciona tehnika koja koristi rotacionu mućkalicu se pokazala kao pouzdanija od tehnike ekstrakcije potpomognute ultrazvukom, jer količina ekstrahovanih anjona pri ekstrakciji uz pomoć ultrazvuka nije u korelaciji sa produženjem ekstrakcionog vremena.",
publisher = "Srpsko hemijsko društvo, Beograd",
journal = "JOURNAL OF THE SERBIAN CHEMICAL SOCIETY",
title = "A comparison of sample extraction procedures for the determination of inorganic anions in soil by ion chromatography, Uticaj pripreme uzorka zemljišta na određivanje neorganskih anjona metodom jonske hromatografije",
pages = "780-769",
number = "5",
volume = "76",
doi = "10.2298/JSC100911069S"
}

Stanišić, S. M., Ignjatović, L. M., Stević, M. C.,& Djordjević, A.. (2011). A comparison of sample extraction procedures for the determination of inorganic anions in soil by ion chromatography. in JOURNAL OF THE SERBIAN CHEMICAL SOCIETY
Srpsko hemijsko društvo, Beograd., 76(5), 769-780.
https://doi.org/10.2298/JSC100911069S

Stanišić SM, Ignjatović LM, Stević MC, Djordjević A. A comparison of sample extraction procedures for the determination of inorganic anions in soil by ion chromatography. in JOURNAL OF THE SERBIAN CHEMICAL SOCIETY. 2011;76(5):769-780.
doi:10.2298/JSC100911069S .

Stanišić, Svetlana M., Ignjatović, Ljubiša M., Stević, Milica C., Djordjević, Aleksandar, "A comparison of sample extraction procedures for the determination of inorganic anions in soil by ion chromatography" in JOURNAL OF THE SERBIAN CHEMICAL SOCIETY, 76, no. 5 (2011):769-780,
https://doi.org/10.2298/JSC100911069S . .

TY  - JOUR
AU  - Durović, Rada D.
AU  - Gajić-Umiljendić, Jelena
AU  - Cupać, Svjetlana
AU  - Ignjatović, Ljubiša M.
PY  - 2010
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/2136
AB  - A solid phase microextraction (SPME) method for simultaneous determination of 20 pesticides belonging to various pesticide groups in soil samples was developed. Extraction conditions, such as fibre type, desorption temperature and time, extraction time and NaCl content were investigated. Detection and quantification were done by gas chromatography-mass spectrometry (GC-MS). The results indicate that most of the studied pesticides were more strongly sorbed by soil that has higher organic matter and/or clay content. Relative standard deviation (RSD) values for multiple analysis of soil samples fortified at 30 mu g kg(-1) of each pesticide were below 19%. Limits of detection (LOD) for all the compounds studied were less than 5 mu g kg(-1).
PB  - Sociedade Brasileira de Química
T2  - Journal of the Brazilian Chemical Society
T1  - Solid Phase Microextraction as an Efficient Method for Characterization of the Interaction of Pesticides with Different Soil Types
EP  - 994
IS  - 6
SP  - 985
VL  - 21
UR  - https://hdl.handle.net/21.15107/rcub_agrospace_2136
ER  - 

@article{
author = "Durović, Rada D. and Gajić-Umiljendić, Jelena and Cupać, Svjetlana and Ignjatović, Ljubiša M.",
year = "2010",
abstract = "A solid phase microextraction (SPME) method for simultaneous determination of 20 pesticides belonging to various pesticide groups in soil samples was developed. Extraction conditions, such as fibre type, desorption temperature and time, extraction time and NaCl content were investigated. Detection and quantification were done by gas chromatography-mass spectrometry (GC-MS). The results indicate that most of the studied pesticides were more strongly sorbed by soil that has higher organic matter and/or clay content. Relative standard deviation (RSD) values for multiple analysis of soil samples fortified at 30 mu g kg(-1) of each pesticide were below 19%. Limits of detection (LOD) for all the compounds studied were less than 5 mu g kg(-1).",
publisher = "Sociedade Brasileira de Química",
journal = "Journal of the Brazilian Chemical Society",
title = "Solid Phase Microextraction as an Efficient Method for Characterization of the Interaction of Pesticides with Different Soil Types",
pages = "994-985",
number = "6",
volume = "21",
url = "https://hdl.handle.net/21.15107/rcub_agrospace_2136"
}

Durović, R. D., Gajić-Umiljendić, J., Cupać, S.,& Ignjatović, L. M.. (2010). Solid Phase Microextraction as an Efficient Method for Characterization of the Interaction of Pesticides with Different Soil Types. in Journal of the Brazilian Chemical Society
Sociedade Brasileira de Química., 21(6), 985-994.
https://hdl.handle.net/21.15107/rcub_agrospace_2136

Durović RD, Gajić-Umiljendić J, Cupać S, Ignjatović LM. Solid Phase Microextraction as an Efficient Method for Characterization of the Interaction of Pesticides with Different Soil Types. in Journal of the Brazilian Chemical Society. 2010;21(6):985-994.
https://hdl.handle.net/21.15107/rcub_agrospace_2136 .

Durović, Rada D., Gajić-Umiljendić, Jelena, Cupać, Svjetlana, Ignjatović, Ljubiša M., "Solid Phase Microextraction as an Efficient Method for Characterization of the Interaction of Pesticides with Different Soil Types" in Journal of the Brazilian Chemical Society, 21, no. 6 (2010):985-994,
https://hdl.handle.net/21.15107/rcub_agrospace_2136 .