TY  - JOUR
AU  - Rajković, Miloš
AU  - Sredović, Ivana
AU  - Miloradović, Zorana
PY  - 2010
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/2198
AB  - The content of NaCl (weight fraction of Cl-ions, in %) was analysed in different cheeses, which were bought in supermarkets, and made by domestic manufacturers. Sodium chloride in cheese samples was analysed after the extraction of chloride by nitric acid solution. Concentration of chloride ions was potentiometricly determined, with the chloride selective electrode and titrimetricly by Volhard method. According to the results in the analysis of the content of NaCl in %, by different methods it was determined that the share of NaCl in % ranged from 0.66 to 4.43% (determined by potentiometric route) that is from 0.97 to 4.72% (determined by titrimetric route by Volhard method). The difference in received results in different methods is less if the share of NaCl, in % is higher than 3%. If the share is less than 3%, the difference in results rapidly increases, and the biggest difference is when the share is less than 1%. This analysis was done according to the results received by Volhard method, which is accepted as a standard method. As Volhard method is in connection with cheese resolving by intense oxidation means, azotic acid and potassium permanganate, obligatory in fume board (hood), it is not a practical method. On the other hand, the potentiometric method with usage of the chloride-selective electrode is very simple and gives reliable and reproductive results. In case of a small content of NaCl, in %, higher precision and accuracy of determination by chloride-selective electrode can be obtained by indirect measurement of chloride-ions (by standard addition method).
AB  - Sadržaj NaCl (udeo Cl-jona, u %) analiziran je u sirevima domaćih proizvođača. Natrijum-hlorid u uzorcima sireva određivan je nakon ekstrakcije hlorida rastvorom azotne kiseline. Koncentracija hlorid-jona je određivana potenciometrijski, pomoću hlorid-selektivne elektrode i titrimetrijski klasičnom Folhardovom metodom. Prema rezultatima određivanju sadržaja NaCl, u %, različitim metodama utvrđeno je da se udeo NaCl, u %, kreće u oblasti od 0,66 do 4,43% (određeno potenciometrijskim putem) odnosno od 0,97 do 4,72% (određeno titrimetrijskim putem Folhardovom metodom). Odstupanja u dobijenim rezultatima različitim metodama su utoliko manja ukoliko je udeo NaCl, u %, veći od 3%. Ukoliko je udeo ispod 3%, razlika u rezultatima se rapidno povećava, dok je najveća razlika ukoliko je udeo manji od 1%. Ova analiza sprovedena je na osnovu rezultata koji su dobijeni Folhardovom metodom, koja je prihvaćena kao standardna metoda. Kako je Folhardova metoda povezana sa razaranjem sira u jakim oksidacionim sredstvima, azotnom kiselinom i kalijum-permanganatom, obavezno u digestoru, nije praktična metoda. Sa druge strane, potenciometrijska metoda uz upotrebu hlorid-selektivne elektrode je veoma jednostavna i daje pouzdane i reproduktivne rezultate. U slučaju malog sadržaja NaCl, u %, veća preciznost i tačnost određivanja hlorid-selektivnom elektrodom može se postići indirektnim merenjem hlorid-jona (metodom standardnog dodatka).
PB  - Univerzitet u Beogradu - Poljoprivredni fakultet, Beograd
T2  - Journal of Agricultural Sciences (Belgrade)
T1  - Comparison of different methods for determination of sodium chloride in cheese
T1  - Poređenje različitih metoda određivanja natrijum-hlorida u siru
EP  - 77
IS  - 1
SP  - 65
VL  - 55
DO  - 10.2298/JAS1001065R
ER  - 

@article{
author = "Rajković, Miloš and Sredović, Ivana and Miloradović, Zorana",
year = "2010",
abstract = "The content of NaCl (weight fraction of Cl-ions, in %) was analysed in different cheeses, which were bought in supermarkets, and made by domestic manufacturers. Sodium chloride in cheese samples was analysed after the extraction of chloride by nitric acid solution. Concentration of chloride ions was potentiometricly determined, with the chloride selective electrode and titrimetricly by Volhard method. According to the results in the analysis of the content of NaCl in %, by different methods it was determined that the share of NaCl in % ranged from 0.66 to 4.43% (determined by potentiometric route) that is from 0.97 to 4.72% (determined by titrimetric route by Volhard method). The difference in received results in different methods is less if the share of NaCl, in % is higher than 3%. If the share is less than 3%, the difference in results rapidly increases, and the biggest difference is when the share is less than 1%. This analysis was done according to the results received by Volhard method, which is accepted as a standard method. As Volhard method is in connection with cheese resolving by intense oxidation means, azotic acid and potassium permanganate, obligatory in fume board (hood), it is not a practical method. On the other hand, the potentiometric method with usage of the chloride-selective electrode is very simple and gives reliable and reproductive results. In case of a small content of NaCl, in %, higher precision and accuracy of determination by chloride-selective electrode can be obtained by indirect measurement of chloride-ions (by standard addition method)., Sadržaj NaCl (udeo Cl-jona, u %) analiziran je u sirevima domaćih proizvođača. Natrijum-hlorid u uzorcima sireva određivan je nakon ekstrakcije hlorida rastvorom azotne kiseline. Koncentracija hlorid-jona je određivana potenciometrijski, pomoću hlorid-selektivne elektrode i titrimetrijski klasičnom Folhardovom metodom. Prema rezultatima određivanju sadržaja NaCl, u %, različitim metodama utvrđeno je da se udeo NaCl, u %, kreće u oblasti od 0,66 do 4,43% (određeno potenciometrijskim putem) odnosno od 0,97 do 4,72% (određeno titrimetrijskim putem Folhardovom metodom). Odstupanja u dobijenim rezultatima različitim metodama su utoliko manja ukoliko je udeo NaCl, u %, veći od 3%. Ukoliko je udeo ispod 3%, razlika u rezultatima se rapidno povećava, dok je najveća razlika ukoliko je udeo manji od 1%. Ova analiza sprovedena je na osnovu rezultata koji su dobijeni Folhardovom metodom, koja je prihvaćena kao standardna metoda. Kako je Folhardova metoda povezana sa razaranjem sira u jakim oksidacionim sredstvima, azotnom kiselinom i kalijum-permanganatom, obavezno u digestoru, nije praktična metoda. Sa druge strane, potenciometrijska metoda uz upotrebu hlorid-selektivne elektrode je veoma jednostavna i daje pouzdane i reproduktivne rezultate. U slučaju malog sadržaja NaCl, u %, veća preciznost i tačnost određivanja hlorid-selektivnom elektrodom može se postići indirektnim merenjem hlorid-jona (metodom standardnog dodatka).",
publisher = "Univerzitet u Beogradu - Poljoprivredni fakultet, Beograd",
journal = "Journal of Agricultural Sciences (Belgrade)",
title = "Comparison of different methods for determination of sodium chloride in cheese, Poređenje različitih metoda određivanja natrijum-hlorida u siru",
pages = "77-65",
number = "1",
volume = "55",
doi = "10.2298/JAS1001065R"
}

Rajković, M., Sredović, I.,& Miloradović, Z.. (2010). Comparison of different methods for determination of sodium chloride in cheese. in Journal of Agricultural Sciences (Belgrade)
Univerzitet u Beogradu - Poljoprivredni fakultet, Beograd., 55(1), 65-77.
https://doi.org/10.2298/JAS1001065R

Rajković M, Sredović I, Miloradović Z. Comparison of different methods for determination of sodium chloride in cheese. in Journal of Agricultural Sciences (Belgrade). 2010;55(1):65-77.
doi:10.2298/JAS1001065R .

Rajković, Miloš, Sredović, Ivana, Miloradović, Zorana, "Comparison of different methods for determination of sodium chloride in cheese" in Journal of Agricultural Sciences (Belgrade), 55, no. 1 (2010):65-77,
https://doi.org/10.2298/JAS1001065R . .

TY  - JOUR
AU  - Sredović-Ignjatović, Ivana
AU  - Rajaković, Ljubinka V.
PY  - 2010
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/2398
AB  - Corrosion effects in thermal power plants and environmental impact cause an increase in demand for fluorine analysis in coal. Solid sample decomposition, organic and inorganic fluorine compounds, volatility of fluorine species are problems which deserve a special attention. The aim of this work was to optimize the pyrohydrolytic (Phy) determination of fluorine content in the lignite coal. The parameters of pyrohydrolysis were evaluated and optimized by two statistical methods: Plackett-Burman (PB) design and response surface methodology (RSM). The content of fluorine in the absorption solution was measured by fluoride ion-selective electrode. The limit of detection of the proposed method was 20 mu g g(-1), with good recovery (95%) and relative standard deviation less than 5%. With such benefits as simplicity, precision, accuracy and economy, this method is highly suitable for routine analysis of coal.
PB  - Elsevier Science Bv, Amsterdam
T2  - Journal of Hazardous Materials
T1  - Pyrohydrolytic determination of fluorine in coal: A chemometric approach
EP  - 451
IS  - 1-3
SP  - 445
VL  - 177
DO  - 10.1016/j.jhazmat.2009.12.053
ER  - 

@article{
author = "Sredović-Ignjatović, Ivana and Rajaković, Ljubinka V.",
year = "2010",
abstract = "Corrosion effects in thermal power plants and environmental impact cause an increase in demand for fluorine analysis in coal. Solid sample decomposition, organic and inorganic fluorine compounds, volatility of fluorine species are problems which deserve a special attention. The aim of this work was to optimize the pyrohydrolytic (Phy) determination of fluorine content in the lignite coal. The parameters of pyrohydrolysis were evaluated and optimized by two statistical methods: Plackett-Burman (PB) design and response surface methodology (RSM). The content of fluorine in the absorption solution was measured by fluoride ion-selective electrode. The limit of detection of the proposed method was 20 mu g g(-1), with good recovery (95%) and relative standard deviation less than 5%. With such benefits as simplicity, precision, accuracy and economy, this method is highly suitable for routine analysis of coal.",
publisher = "Elsevier Science Bv, Amsterdam",
journal = "Journal of Hazardous Materials",
title = "Pyrohydrolytic determination of fluorine in coal: A chemometric approach",
pages = "451-445",
number = "1-3",
volume = "177",
doi = "10.1016/j.jhazmat.2009.12.053"
}

Sredović-Ignjatović, I.,& Rajaković, L. V.. (2010). Pyrohydrolytic determination of fluorine in coal: A chemometric approach. in Journal of Hazardous Materials
Elsevier Science Bv, Amsterdam., 177(1-3), 445-451.
https://doi.org/10.1016/j.jhazmat.2009.12.053

Sredović-Ignjatović I, Rajaković LV. Pyrohydrolytic determination of fluorine in coal: A chemometric approach. in Journal of Hazardous Materials. 2010;177(1-3):445-451.
doi:10.1016/j.jhazmat.2009.12.053 .

Sredović-Ignjatović, Ivana, Rajaković, Ljubinka V., "Pyrohydrolytic determination of fluorine in coal: A chemometric approach" in Journal of Hazardous Materials, 177, no. 1-3 (2010):445-451,
https://doi.org/10.1016/j.jhazmat.2009.12.053 . .

TY  - JOUR
AU  - Dragović, Snežana
AU  - Mihailović, Nevena
AU  - Gajić, Boško
PY  - 2010
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/2365
AB  - There is a lack of appropriate data on transfer of some radionuclides on many terrestrial biota groups. To expand the available data concentration ratios of U-238, Ra-226, Th-232, K-40 and Cs-137 in mosses are presented in this paper. The relationship between concentration ratios of radionuclides and physicochemical characteristics of the underlying soil was also investigated. The data on concentration ratios obtained here will provide a useful addition to the currently used database of transfer parameters, particularly for natural radionuclides.
PB  - Elsevier Sci Ltd, Oxford
T2  - Journal of Environmental Radioactivity
T1  - Quantification of transfer of U-238, Ra-226, Th-232, K-40 and Cs-137 in mosses of a semi-natural ecosystem
EP  - 164
IS  - 2
SP  - 159
VL  - 101
DO  - 10.1016/j.jenvrad.2009.09.011
ER  - 

@article{
author = "Dragović, Snežana and Mihailović, Nevena and Gajić, Boško",
year = "2010",
abstract = "There is a lack of appropriate data on transfer of some radionuclides on many terrestrial biota groups. To expand the available data concentration ratios of U-238, Ra-226, Th-232, K-40 and Cs-137 in mosses are presented in this paper. The relationship between concentration ratios of radionuclides and physicochemical characteristics of the underlying soil was also investigated. The data on concentration ratios obtained here will provide a useful addition to the currently used database of transfer parameters, particularly for natural radionuclides.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Journal of Environmental Radioactivity",
title = "Quantification of transfer of U-238, Ra-226, Th-232, K-40 and Cs-137 in mosses of a semi-natural ecosystem",
pages = "164-159",
number = "2",
volume = "101",
doi = "10.1016/j.jenvrad.2009.09.011"
}

Dragović, S., Mihailović, N.,& Gajić, B.. (2010). Quantification of transfer of U-238, Ra-226, Th-232, K-40 and Cs-137 in mosses of a semi-natural ecosystem. in Journal of Environmental Radioactivity
Elsevier Sci Ltd, Oxford., 101(2), 159-164.
https://doi.org/10.1016/j.jenvrad.2009.09.011

Dragović S, Mihailović N, Gajić B. Quantification of transfer of U-238, Ra-226, Th-232, K-40 and Cs-137 in mosses of a semi-natural ecosystem. in Journal of Environmental Radioactivity. 2010;101(2):159-164.
doi:10.1016/j.jenvrad.2009.09.011 .

Dragović, Snežana, Mihailović, Nevena, Gajić, Boško, "Quantification of transfer of U-238, Ra-226, Th-232, K-40 and Cs-137 in mosses of a semi-natural ecosystem" in Journal of Environmental Radioactivity, 101, no. 2 (2010):159-164,
https://doi.org/10.1016/j.jenvrad.2009.09.011 . .

TY  - JOUR
AU  - Rajković, Miloš
PY  - 2009
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/1943
AB  - The samples of table salt bought in Belgrade supermarkets are analyzed in this paper. The method of indirect iodometry was used in the process of the analysis, and received results were converted into the content of KI in mg/kg of salt. Beside the content of KI, the content of NaCl was also determined, counted to dry meter and water content, and received results were compared with the requests determined by Regulations of Table Salt Quality Meant for Human Diet and by manufacturers' declaration. Received results show that the volumetric method of indirect iodometry, applied in this analysis, is very reliable for determination of potassium iodine in table salt, because of its high precision and reproducibility of the analysis results. All received results show that the samples of table salt which can be bought in supermarkets are according to the demands given by Regulations. Only one sample (evaporated salt) has significantly less mass of KI than it is determined by Regulations, but also by manufacturer's declaration. Measured humidity in the samples of table salt received from sea salt (sample 1) is higher than humidity in the samples received from rock salt as the result of magnesium presence in sea salt, which is hygroscopic material. Although samples 5 and 6 also originate from sea salt, their smaller humidity is the result of additional heating and salt processing.
AB  - U radu su ispitivani uzorci kuhinjske soli koji se mogu nabaviti u beogradskim prodavnicama. U radu je primenjena metoda indirektne jodimetrije, a dobijeni rezultati su preračunavani na sadržaj KI u mg/kg soli. Osim sadržaja KI, određivan je i sadržaj NaCl, računato na suvu materiju i sadržaj vode, a dobijeni rezultati upoređeni su za zahtevima koji su predviđeni Pravilnikom o kvalitetu kuhinjske soli predviđenim za ljudsku ishranu i proizvođačkom deklaracijom. Dobijeni rezultati su pokazali da je volumetrijska metoda indirektne jodimetrije, primenjena u ovom radu, veoma pouzdana za određivanje kalijum-jodida u kuhinjskoj soli, usled velike preciznosti i reproduktivnosti rezultata ispitivanja. Svi dobijeni rezultati pokazali su da uzorci kuhinjske soli koji se mogu nabaviti u trgovini odgovaraju zahtevima Pravilnika, osim jednog uzorka (varena so) koji je sadržao znatno manju masu KI nego što je predviđeno Pravilnikom, ali i proizvođačkom deklaracijom. Izmerena vlažnost u uzorcima kuhinjske soli dobijene iz morske vode (uzorak 1.) veća je od vlažnosti u uzorcima dobijenim iz kamene soli kao posledica prisustva magnezijuma u morskoj vodi, koji je higroskopni materijal. Iako su i uzorci 5. i 6. poreklom iz morske vode, njihova mala vlažnost posledica je dodatnog zagrevanja i dorade soli.
PB  - Univerzitet u Beogradu - Poljoprivredni fakultet, Beograd
T2  - Journal of Agricultural Sciences (Belgrade)
T1  - Determination of potassium iodide in table salt
T1  - Određivanje kalijum-jodida u kuhinjskoj soli
EP  - 165
IS  - 2
SP  - 152
VL  - 54
DO  - 10.2298/JAS0902152R
ER  - 

@article{
author = "Rajković, Miloš",
year = "2009",
abstract = "The samples of table salt bought in Belgrade supermarkets are analyzed in this paper. The method of indirect iodometry was used in the process of the analysis, and received results were converted into the content of KI in mg/kg of salt. Beside the content of KI, the content of NaCl was also determined, counted to dry meter and water content, and received results were compared with the requests determined by Regulations of Table Salt Quality Meant for Human Diet and by manufacturers' declaration. Received results show that the volumetric method of indirect iodometry, applied in this analysis, is very reliable for determination of potassium iodine in table salt, because of its high precision and reproducibility of the analysis results. All received results show that the samples of table salt which can be bought in supermarkets are according to the demands given by Regulations. Only one sample (evaporated salt) has significantly less mass of KI than it is determined by Regulations, but also by manufacturer's declaration. Measured humidity in the samples of table salt received from sea salt (sample 1) is higher than humidity in the samples received from rock salt as the result of magnesium presence in sea salt, which is hygroscopic material. Although samples 5 and 6 also originate from sea salt, their smaller humidity is the result of additional heating and salt processing., U radu su ispitivani uzorci kuhinjske soli koji se mogu nabaviti u beogradskim prodavnicama. U radu je primenjena metoda indirektne jodimetrije, a dobijeni rezultati su preračunavani na sadržaj KI u mg/kg soli. Osim sadržaja KI, određivan je i sadržaj NaCl, računato na suvu materiju i sadržaj vode, a dobijeni rezultati upoređeni su za zahtevima koji su predviđeni Pravilnikom o kvalitetu kuhinjske soli predviđenim za ljudsku ishranu i proizvođačkom deklaracijom. Dobijeni rezultati su pokazali da je volumetrijska metoda indirektne jodimetrije, primenjena u ovom radu, veoma pouzdana za određivanje kalijum-jodida u kuhinjskoj soli, usled velike preciznosti i reproduktivnosti rezultata ispitivanja. Svi dobijeni rezultati pokazali su da uzorci kuhinjske soli koji se mogu nabaviti u trgovini odgovaraju zahtevima Pravilnika, osim jednog uzorka (varena so) koji je sadržao znatno manju masu KI nego što je predviđeno Pravilnikom, ali i proizvođačkom deklaracijom. Izmerena vlažnost u uzorcima kuhinjske soli dobijene iz morske vode (uzorak 1.) veća je od vlažnosti u uzorcima dobijenim iz kamene soli kao posledica prisustva magnezijuma u morskoj vodi, koji je higroskopni materijal. Iako su i uzorci 5. i 6. poreklom iz morske vode, njihova mala vlažnost posledica je dodatnog zagrevanja i dorade soli.",
publisher = "Univerzitet u Beogradu - Poljoprivredni fakultet, Beograd",
journal = "Journal of Agricultural Sciences (Belgrade)",
title = "Determination of potassium iodide in table salt, Određivanje kalijum-jodida u kuhinjskoj soli",
pages = "165-152",
number = "2",
volume = "54",
doi = "10.2298/JAS0902152R"
}

Rajković, M.. (2009). Determination of potassium iodide in table salt. in Journal of Agricultural Sciences (Belgrade)
Univerzitet u Beogradu - Poljoprivredni fakultet, Beograd., 54(2), 152-165.
https://doi.org/10.2298/JAS0902152R

Rajković M. Determination of potassium iodide in table salt. in Journal of Agricultural Sciences (Belgrade). 2009;54(2):152-165.
doi:10.2298/JAS0902152R .

Rajković, Miloš, "Determination of potassium iodide in table salt" in Journal of Agricultural Sciences (Belgrade), 54, no. 2 (2009):152-165,
https://doi.org/10.2298/JAS0902152R . .

TY  - JOUR
AU  - Rajković, Miloš
AU  - Lačnjevac, Uroš Č.
AU  - Baščarević, Zvezdana
AU  - Rajković, Teodora M.
AU  - Tošković, Dragan V.
AU  - Stanojević, Dušan D.
PY  - 2008
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/1679
AB  - Sample of scale which taken from house boiler is examined. This scale is made by warming drinking water from water-supply system of the -city of Belgrade - New Belgrade. Examinations on atomic absorption spectrophotometer (AAS) showed that there was mostly calcium, like CaO, for 48.90 % of mass which means calculated on contents CaCO3 takes 87.32 % of mass. Research on diffraction meter showed that scale is composed of CaCO3 (in % of mass) (85.25%), MgCO3 (11.05%), FeCO3 (1.90%) and MnCO3 (1.80%). It was also proved that scale is mixture of 66.92 % Mg calcite and 33.07 % aragonite. This structure is result of fact that Mg calcite and aragonite are become in quiet conditions of sedimentation of half shut skin-deep water surrounding on temperature between 60 and 100°C (nearest about 80°C) and low pressure.
AB  - Ispitivan je uzorak kamenca koji je uzet sa kućnog bojlera nastao zagrevanjem vode za piće koja se nalazi u vodovodnoj mreži grada Beograda - Novi Beograd (blokovi). Ispitivanja na atomskom apsorpcionom spektrofotometru ukazala su da se nalazi dominantno kalcijum, kao CaO i to 48,90%, što preračunato na sadržaj CaCO3 iznosi 87,32%. Snimanja na difraktometru ukazala su da se kamenac sastoji od CaCO3 (85,25%), MgCO3 (11,05%), FeCO3 (1,90%) i MnCO3 (1,80%). Takođe je dokazano da je kamenac mešavina koja se sastoji od 66,92 % kalcita i 33,07% aragonita. Ovakav sastav posledica je činjenice da su kalcit i aragonit nastali u mirnijim uslovima sedimentacije u poluzatvorenoj plitkovodnoj sredini na temperaturi između 60 i 100°C (najbliže oko 80°C) i pri niskom pritisku.
PB  - Inženjersko društvo za koroziju, Beograd
T2  - Zaštita materijala
T1  - Determination of crystalline structure of calcium carbonate obtained from drinking water
T1  - Određivanje kristalne strukture kalcijum-karbonata dobijenog iz vode za piće
EP  - 50
IS  - 2
SP  - 43
VL  - 49
UR  - https://hdl.handle.net/21.15107/rcub_agrospace_1679
ER  - 

@article{
author = "Rajković, Miloš and Lačnjevac, Uroš Č. and Baščarević, Zvezdana and Rajković, Teodora M. and Tošković, Dragan V. and Stanojević, Dušan D.",
year = "2008",
abstract = "Sample of scale which taken from house boiler is examined. This scale is made by warming drinking water from water-supply system of the -city of Belgrade - New Belgrade. Examinations on atomic absorption spectrophotometer (AAS) showed that there was mostly calcium, like CaO, for 48.90 % of mass which means calculated on contents CaCO3 takes 87.32 % of mass. Research on diffraction meter showed that scale is composed of CaCO3 (in % of mass) (85.25%), MgCO3 (11.05%), FeCO3 (1.90%) and MnCO3 (1.80%). It was also proved that scale is mixture of 66.92 % Mg calcite and 33.07 % aragonite. This structure is result of fact that Mg calcite and aragonite are become in quiet conditions of sedimentation of half shut skin-deep water surrounding on temperature between 60 and 100°C (nearest about 80°C) and low pressure., Ispitivan je uzorak kamenca koji je uzet sa kućnog bojlera nastao zagrevanjem vode za piće koja se nalazi u vodovodnoj mreži grada Beograda - Novi Beograd (blokovi). Ispitivanja na atomskom apsorpcionom spektrofotometru ukazala su da se nalazi dominantno kalcijum, kao CaO i to 48,90%, što preračunato na sadržaj CaCO3 iznosi 87,32%. Snimanja na difraktometru ukazala su da se kamenac sastoji od CaCO3 (85,25%), MgCO3 (11,05%), FeCO3 (1,90%) i MnCO3 (1,80%). Takođe je dokazano da je kamenac mešavina koja se sastoji od 66,92 % kalcita i 33,07% aragonita. Ovakav sastav posledica je činjenice da su kalcit i aragonit nastali u mirnijim uslovima sedimentacije u poluzatvorenoj plitkovodnoj sredini na temperaturi između 60 i 100°C (najbliže oko 80°C) i pri niskom pritisku.",
publisher = "Inženjersko društvo za koroziju, Beograd",
journal = "Zaštita materijala",
title = "Determination of crystalline structure of calcium carbonate obtained from drinking water, Određivanje kristalne strukture kalcijum-karbonata dobijenog iz vode za piće",
pages = "50-43",
number = "2",
volume = "49",
url = "https://hdl.handle.net/21.15107/rcub_agrospace_1679"
}

Rajković, M., Lačnjevac, U. Č., Baščarević, Z., Rajković, T. M., Tošković, D. V.,& Stanojević, D. D.. (2008). Determination of crystalline structure of calcium carbonate obtained from drinking water. in Zaštita materijala
Inženjersko društvo za koroziju, Beograd., 49(2), 43-50.
https://hdl.handle.net/21.15107/rcub_agrospace_1679

Rajković M, Lačnjevac UČ, Baščarević Z, Rajković TM, Tošković DV, Stanojević DD. Determination of crystalline structure of calcium carbonate obtained from drinking water. in Zaštita materijala. 2008;49(2):43-50.
https://hdl.handle.net/21.15107/rcub_agrospace_1679 .

Rajković, Miloš, Lačnjevac, Uroš Č., Baščarević, Zvezdana, Rajković, Teodora M., Tošković, Dragan V., Stanojević, Dušan D., "Determination of crystalline structure of calcium carbonate obtained from drinking water" in Zaštita materijala, 49, no. 2 (2008):43-50,
https://hdl.handle.net/21.15107/rcub_agrospace_1679 .

TY  - JOUR
AU  - Rajković, Miloš
AU  - Lačnjevac, Časlav
AU  - Ralević, Nebojša
AU  - Stojanović, Mirjana D.
AU  - Tosković, Dragan V.
AU  - Pantelić, Gordana K.
AU  - Ristić, Nikola
AU  - Jovanić, Sasa
PY  - 2008
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/1810
AB  - The analysis of water quality, regarding the content of metals, especially heavy and radioactive ones, has been carried out in an indirect way, by testing scale formed in a hot-water heater, using water from the water-supply network of the city of Belgrade - the district of New Belgrade. The determination of the composition and the structure of the scale has resulted in its complete identification, and its crystallochemical formula has been defined. It has unequivocally been established that the obtained results are within the tolerance boundary with the results acquired by a conventional analysis of water, when it is a matter of very low concentrations. The presence of radioactive elements of uranium and strontium in a scale sample has been found and the way of their penetrating its composition and structure has been explained. Applying the fractional extraction method, uranium has been established to be of an anthropogenic origin.
PB  - MDPI, BASEL
T2  - Sensors
T1  - Identification of metals (heavy and radioactive) in drinking water by an indirect analysis method based on scale tests
EP  - 2207
IS  - 4
SP  - 2188
VL  - 8
DO  - 10.3390/s8042188
ER  - 

@article{
author = "Rajković, Miloš and Lačnjevac, Časlav and Ralević, Nebojša and Stojanović, Mirjana D. and Tosković, Dragan V. and Pantelić, Gordana K. and Ristić, Nikola and Jovanić, Sasa",
year = "2008",
abstract = "The analysis of water quality, regarding the content of metals, especially heavy and radioactive ones, has been carried out in an indirect way, by testing scale formed in a hot-water heater, using water from the water-supply network of the city of Belgrade - the district of New Belgrade. The determination of the composition and the structure of the scale has resulted in its complete identification, and its crystallochemical formula has been defined. It has unequivocally been established that the obtained results are within the tolerance boundary with the results acquired by a conventional analysis of water, when it is a matter of very low concentrations. The presence of radioactive elements of uranium and strontium in a scale sample has been found and the way of their penetrating its composition and structure has been explained. Applying the fractional extraction method, uranium has been established to be of an anthropogenic origin.",
publisher = "MDPI, BASEL",
journal = "Sensors",
title = "Identification of metals (heavy and radioactive) in drinking water by an indirect analysis method based on scale tests",
pages = "2207-2188",
number = "4",
volume = "8",
doi = "10.3390/s8042188"
}

Rajković, M., Lačnjevac, Č., Ralević, N., Stojanović, M. D., Tosković, D. V., Pantelić, G. K., Ristić, N.,& Jovanić, S.. (2008). Identification of metals (heavy and radioactive) in drinking water by an indirect analysis method based on scale tests. in Sensors
MDPI, BASEL., 8(4), 2188-2207.
https://doi.org/10.3390/s8042188

Rajković M, Lačnjevac Č, Ralević N, Stojanović MD, Tosković DV, Pantelić GK, Ristić N, Jovanić S. Identification of metals (heavy and radioactive) in drinking water by an indirect analysis method based on scale tests. in Sensors. 2008;8(4):2188-2207.
doi:10.3390/s8042188 .

Rajković, Miloš, Lačnjevac, Časlav, Ralević, Nebojša, Stojanović, Mirjana D., Tosković, Dragan V., Pantelić, Gordana K., Ristić, Nikola, Jovanić, Sasa, "Identification of metals (heavy and radioactive) in drinking water by an indirect analysis method based on scale tests" in Sensors, 8, no. 4 (2008):2188-2207,
https://doi.org/10.3390/s8042188 . .

TY  - JOUR
AU  - Dragović, Snežana
AU  - Mihailović, Nevena
AU  - Gajić, Boško
PY  - 2008
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/1811
AB  - The study is dealing with the distribution and the origin of heavy metals (Cd, Cr, Cu, Mn, Ni, Pb and Zn) in soils from a priori non-polluted areas. Positive correlations with organic matter and clay content but not with pH have been observed for most of elements analyzed in this study. Correlations of some metals (Cr, Pb and Zn) and radionuclides (U-238 and (CS)-C-137) observed for analyzed soils could be explained by their common affinity for clay minerals. Enrichment factor (EF) analysis and cluster analysis (CA) highlighted the lithogenic origin of Cr, Cu, Mn, Ni, Pb and Zn and pointed out the primary input of Cd from anthropogenic sources. it also revealed the need for detailed geochemical surveys in the future in order to decrease the uncertainty of discrimination between lithogenic and anthropogenic origin of metals of interest.
PB  - Pergamon-Elsevier Science Ltd, Oxford
T2  - Chemosphere
T1  - Heavy metals in soils: Distribution, relationship with soil characteristics and radionuclides and multivariate assessment of contamination sources
EP  - 495
IS  - 3
SP  - 491
VL  - 72
DO  - 10.1016/j.chemosphere.2008.02.063
ER  - 

@article{
author = "Dragović, Snežana and Mihailović, Nevena and Gajić, Boško",
year = "2008",
abstract = "The study is dealing with the distribution and the origin of heavy metals (Cd, Cr, Cu, Mn, Ni, Pb and Zn) in soils from a priori non-polluted areas. Positive correlations with organic matter and clay content but not with pH have been observed for most of elements analyzed in this study. Correlations of some metals (Cr, Pb and Zn) and radionuclides (U-238 and (CS)-C-137) observed for analyzed soils could be explained by their common affinity for clay minerals. Enrichment factor (EF) analysis and cluster analysis (CA) highlighted the lithogenic origin of Cr, Cu, Mn, Ni, Pb and Zn and pointed out the primary input of Cd from anthropogenic sources. it also revealed the need for detailed geochemical surveys in the future in order to decrease the uncertainty of discrimination between lithogenic and anthropogenic origin of metals of interest.",
publisher = "Pergamon-Elsevier Science Ltd, Oxford",
journal = "Chemosphere",
title = "Heavy metals in soils: Distribution, relationship with soil characteristics and radionuclides and multivariate assessment of contamination sources",
pages = "495-491",
number = "3",
volume = "72",
doi = "10.1016/j.chemosphere.2008.02.063"
}

Dragović, S., Mihailović, N.,& Gajić, B.. (2008). Heavy metals in soils: Distribution, relationship with soil characteristics and radionuclides and multivariate assessment of contamination sources. in Chemosphere
Pergamon-Elsevier Science Ltd, Oxford., 72(3), 491-495.
https://doi.org/10.1016/j.chemosphere.2008.02.063

Dragović S, Mihailović N, Gajić B. Heavy metals in soils: Distribution, relationship with soil characteristics and radionuclides and multivariate assessment of contamination sources. in Chemosphere. 2008;72(3):491-495.
doi:10.1016/j.chemosphere.2008.02.063 .

Dragović, Snežana, Mihailović, Nevena, Gajić, Boško, "Heavy metals in soils: Distribution, relationship with soil characteristics and radionuclides and multivariate assessment of contamination sources" in Chemosphere, 72, no. 3 (2008):491-495,
https://doi.org/10.1016/j.chemosphere.2008.02.063 . .

TY  - JOUR
AU  - Rajković, Miloš
AU  - Lačnjevac, Časlav
AU  - Tošković, Dragan V.
AU  - Stanojević, Dušan D.
PY  - 2007
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/1433
AB  - Phosphogypsum which is produced by "dihydrating procedure" contains not only uncleanesses but radionuclides, too which limit its construction use. Performed testings point to the structure complexility and phosphogypsum composition while the electron microscope’s pictures showed a different crystal phosphogypsum composition comparing to the natural gypsum. In order to use the waste material of phosphogypsum it must be refined and calcined because of a great number of uncleanesses, the soutce of raw-material and because of a chemical way of producing. By expecting procedure of refinery the radionuclides content stays approximately the same, but it approaches to the natural gypsum because of its physico-chemical characteristics. A stable shape of phosphogypsum α-chemihydrate is got by a longer drying on the temperature of 105°C and it is very similar to the natural gypsum because of its physico-chemical characteristics. As the presence of some uncleanesses isn’t limited for the further use, the phosphogypsum refined in this way, by futher particles reducing to the size of ca. 100 μm, shows as adequate substitute for the natural gypsum. The calcined and refined phosphogypsum can be used for partion walls producing. To avoid the danger of possible radionuclides presence it is better to use the mixture of natural gypsum and phosphogypsum for this production. A great saving of materials and economic effect can be carried out in this way.
AB  - Fosfogips dobijen "dihidratnim postupkom" sadrži, osim nečistoća, i radionuklide koji ograničavaju njegovu primenu u građevinarstvu. Ispitivanja izvršena u radu ukazala su na složenost strukture i sastava fosfogipsa, dok su snimci na elektronskom mikroskopu pokazali različit kristalni sastav fosfogipsa u poređenju sa prirodnim gipsom. Usled prisustva velikog broja nečistoća koje svoje poreklo vode iz osnovne sirovine (fosfogipsa) i zbog hemijskog načina prerade, da bi se otpadni fosfogips upotrebio mora se dodatno prečišćavati i kalcinisati. Predviđenim postupkom prečišćavanja sadržaj radionuklida ostaje približno isti, ali se po njegovim fizičko-hemijskim svojstvima približava prirodnom gipsu. Dužim sušenjem, na temperaturi od 105°C, dobija se stabilni oblik fosfogipsa, α-hemihidrat, koji je po svojim fizičko-hemijskim karakteristikama veoma sličan prirodnom gipsu. Pošto prisustvo nekih nečistoća nije ograničavajuće za dalju primenu, ovako prečišćen fosfogips, daljim usitnjavanjem čestica do veličine od cca. 100 μm, predstavlja adekvatnu zamenu za prirodni gips. Kalcinisani i prečišćeni fosfogips može se koristiti za izradu gipskartonskih ploča, koje se zatim mogu upotrebiti za izradu pregradnih zidova. Da bi se potpuno uklonila opasnost od eventualno prisutnih radionuklida, za izradu je bolje da se koristi mešavina prirodnog gipsa i fosfogipsa. Na taj način ostvarila bi se velika ušteda u materijalu i veliki ekonomski efekat.
PB  - Inženjersko društvo za koroziju, Beograd
T2  - Zaštita materijala
T1  - The possibility of phosphogypsum application as the element of prefibricated building
T1  - Ispitivanje mogućnosti primene fosfogipsa za izradu pregradnog zida - elementa montažnog objekta
EP  - 48
IS  - 1
SP  - 41
VL  - 48
UR  - https://hdl.handle.net/21.15107/rcub_agrospace_1433
ER  - 

@article{
author = "Rajković, Miloš and Lačnjevac, Časlav and Tošković, Dragan V. and Stanojević, Dušan D.",
year = "2007",
abstract = "Phosphogypsum which is produced by "dihydrating procedure" contains not only uncleanesses but radionuclides, too which limit its construction use. Performed testings point to the structure complexility and phosphogypsum composition while the electron microscope’s pictures showed a different crystal phosphogypsum composition comparing to the natural gypsum. In order to use the waste material of phosphogypsum it must be refined and calcined because of a great number of uncleanesses, the soutce of raw-material and because of a chemical way of producing. By expecting procedure of refinery the radionuclides content stays approximately the same, but it approaches to the natural gypsum because of its physico-chemical characteristics. A stable shape of phosphogypsum α-chemihydrate is got by a longer drying on the temperature of 105°C and it is very similar to the natural gypsum because of its physico-chemical characteristics. As the presence of some uncleanesses isn’t limited for the further use, the phosphogypsum refined in this way, by futher particles reducing to the size of ca. 100 μm, shows as adequate substitute for the natural gypsum. The calcined and refined phosphogypsum can be used for partion walls producing. To avoid the danger of possible radionuclides presence it is better to use the mixture of natural gypsum and phosphogypsum for this production. A great saving of materials and economic effect can be carried out in this way., Fosfogips dobijen "dihidratnim postupkom" sadrži, osim nečistoća, i radionuklide koji ograničavaju njegovu primenu u građevinarstvu. Ispitivanja izvršena u radu ukazala su na složenost strukture i sastava fosfogipsa, dok su snimci na elektronskom mikroskopu pokazali različit kristalni sastav fosfogipsa u poređenju sa prirodnim gipsom. Usled prisustva velikog broja nečistoća koje svoje poreklo vode iz osnovne sirovine (fosfogipsa) i zbog hemijskog načina prerade, da bi se otpadni fosfogips upotrebio mora se dodatno prečišćavati i kalcinisati. Predviđenim postupkom prečišćavanja sadržaj radionuklida ostaje približno isti, ali se po njegovim fizičko-hemijskim svojstvima približava prirodnom gipsu. Dužim sušenjem, na temperaturi od 105°C, dobija se stabilni oblik fosfogipsa, α-hemihidrat, koji je po svojim fizičko-hemijskim karakteristikama veoma sličan prirodnom gipsu. Pošto prisustvo nekih nečistoća nije ograničavajuće za dalju primenu, ovako prečišćen fosfogips, daljim usitnjavanjem čestica do veličine od cca. 100 μm, predstavlja adekvatnu zamenu za prirodni gips. Kalcinisani i prečišćeni fosfogips može se koristiti za izradu gipskartonskih ploča, koje se zatim mogu upotrebiti za izradu pregradnih zidova. Da bi se potpuno uklonila opasnost od eventualno prisutnih radionuklida, za izradu je bolje da se koristi mešavina prirodnog gipsa i fosfogipsa. Na taj način ostvarila bi se velika ušteda u materijalu i veliki ekonomski efekat.",
publisher = "Inženjersko društvo za koroziju, Beograd",
journal = "Zaštita materijala",
title = "The possibility of phosphogypsum application as the element of prefibricated building, Ispitivanje mogućnosti primene fosfogipsa za izradu pregradnog zida - elementa montažnog objekta",
pages = "48-41",
number = "1",
volume = "48",
url = "https://hdl.handle.net/21.15107/rcub_agrospace_1433"
}

Rajković, M., Lačnjevac, Č., Tošković, D. V.,& Stanojević, D. D.. (2007). The possibility of phosphogypsum application as the element of prefibricated building. in Zaštita materijala
Inženjersko društvo za koroziju, Beograd., 48(1), 41-48.
https://hdl.handle.net/21.15107/rcub_agrospace_1433

Rajković M, Lačnjevac Č, Tošković DV, Stanojević DD. The possibility of phosphogypsum application as the element of prefibricated building. in Zaštita materijala. 2007;48(1):41-48.
https://hdl.handle.net/21.15107/rcub_agrospace_1433 .

Rajković, Miloš, Lačnjevac, Časlav, Tošković, Dragan V., Stanojević, Dušan D., "The possibility of phosphogypsum application as the element of prefibricated building" in Zaštita materijala, 48, no. 1 (2007):41-48,
https://hdl.handle.net/21.15107/rcub_agrospace_1433 .

TY  - JOUR
AU  - Cakić, Suzana
AU  - Rasković, Ljiljana
AU  - Lačnjevac, Časlav
AU  - Rajković, Milos
AU  - Barać, Miroljub
AU  - Stojanović, Miodrag
PY  - 2007
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/1599
AB  - The FTIR spectroscopy has been employed in this research work to monitor the process of nitrodope photodegradation, by measuring surfaces of bands typical of a nitro group. Nitric esters are subject to degradation, which is reflected on a quantitative ratio of the surfaces of the IR bands that originate from the nitric ester. The obtained results show that the length of the UV rays' activity on the samples over the time periods of 240, 480 and 960 minutes directly affects the spectrum appearance of the same sample before and after the irradiation. The longer the action time of the UV rays and the higher a mass percentage of nitrocellulose in the nitrodope is, the smaller the bands' surfaces become, i. e. the level of degradation is higher. In order to confirm the degradation of nitrodope, the degree of crosslinking has also been examined by determining the Konig hardness and also the mean viscosity molar mass has been defined repeatedly applying the capillary viscosimetry method.
PB  - MDPI, BASEL
T2  - Sensors
T1  - Physical-mechanical properties of nitrodopes affected by ultra-violet radiation
EP  - 2156
IS  - 10
SP  - 2139
VL  - 7
DO  - 10.3390/S7102139
ER  - 

@article{
author = "Cakić, Suzana and Rasković, Ljiljana and Lačnjevac, Časlav and Rajković, Milos and Barać, Miroljub and Stojanović, Miodrag",
year = "2007",
abstract = "The FTIR spectroscopy has been employed in this research work to monitor the process of nitrodope photodegradation, by measuring surfaces of bands typical of a nitro group. Nitric esters are subject to degradation, which is reflected on a quantitative ratio of the surfaces of the IR bands that originate from the nitric ester. The obtained results show that the length of the UV rays' activity on the samples over the time periods of 240, 480 and 960 minutes directly affects the spectrum appearance of the same sample before and after the irradiation. The longer the action time of the UV rays and the higher a mass percentage of nitrocellulose in the nitrodope is, the smaller the bands' surfaces become, i. e. the level of degradation is higher. In order to confirm the degradation of nitrodope, the degree of crosslinking has also been examined by determining the Konig hardness and also the mean viscosity molar mass has been defined repeatedly applying the capillary viscosimetry method.",
publisher = "MDPI, BASEL",
journal = "Sensors",
title = "Physical-mechanical properties of nitrodopes affected by ultra-violet radiation",
pages = "2156-2139",
number = "10",
volume = "7",
doi = "10.3390/S7102139"
}

Cakić, S., Rasković, L., Lačnjevac, Č., Rajković, M., Barać, M.,& Stojanović, M.. (2007). Physical-mechanical properties of nitrodopes affected by ultra-violet radiation. in Sensors
MDPI, BASEL., 7(10), 2139-2156.
https://doi.org/10.3390/S7102139

Cakić S, Rasković L, Lačnjevac Č, Rajković M, Barać M, Stojanović M. Physical-mechanical properties of nitrodopes affected by ultra-violet radiation. in Sensors. 2007;7(10):2139-2156.
doi:10.3390/S7102139 .

Cakić, Suzana, Rasković, Ljiljana, Lačnjevac, Časlav, Rajković, Milos, Barać, Miroljub, Stojanović, Miodrag, "Physical-mechanical properties of nitrodopes affected by ultra-violet radiation" in Sensors, 7, no. 10 (2007):2139-2156,
https://doi.org/10.3390/S7102139 . .

TY  - JOUR
AU  - Cakić, Suzana
AU  - Nikolić, Goran
AU  - Lanjevac, Aslav
AU  - Ghgorić, Miladin
AU  - Rajković, Miloš
PY  - 2007
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/1559
AB  - The thermal,ability of aqueous polyurethanes has been measured by applying the thermogravimetric analysis, The aqueous polyurethanes (aqPUR) with catalysts of different selectivity have been studied by use of the dynamic method. To obtain degradations of 0.025, 0.05 and 0.10, employing the dynamic method, the heating rates of 0.5, 1, 2, 5 and 10 degrees C min(-1) have been used in the range of 30-500 degrees C. Using the more selective catalysts in the aqueous polyurethanes the total resulting time of the decomposition has increased at all degradation degrees and at all temperatures. This paper shows that the dynamic method based on the thermogravimetric analysis can be used to assess the thermal stability of the aqueous polyurethanes using the catalysts of different selectivity.
PB  - Elsevier Science Sa, Lausanne
T2  - Progress in Organic Coatings
T1  - The thermal degradation of aqueous polyurethanes with catalysts of different selectivity
EP  - 116
IS  - 2
SP  - 112
VL  - 60
DO  - 10.1016/j.porgcoat.2007.07.004
ER  - 

@article{
author = "Cakić, Suzana and Nikolić, Goran and Lanjevac, Aslav and Ghgorić, Miladin and Rajković, Miloš",
year = "2007",
abstract = "The thermal,ability of aqueous polyurethanes has been measured by applying the thermogravimetric analysis, The aqueous polyurethanes (aqPUR) with catalysts of different selectivity have been studied by use of the dynamic method. To obtain degradations of 0.025, 0.05 and 0.10, employing the dynamic method, the heating rates of 0.5, 1, 2, 5 and 10 degrees C min(-1) have been used in the range of 30-500 degrees C. Using the more selective catalysts in the aqueous polyurethanes the total resulting time of the decomposition has increased at all degradation degrees and at all temperatures. This paper shows that the dynamic method based on the thermogravimetric analysis can be used to assess the thermal stability of the aqueous polyurethanes using the catalysts of different selectivity.",
publisher = "Elsevier Science Sa, Lausanne",
journal = "Progress in Organic Coatings",
title = "The thermal degradation of aqueous polyurethanes with catalysts of different selectivity",
pages = "116-112",
number = "2",
volume = "60",
doi = "10.1016/j.porgcoat.2007.07.004"
}

Cakić, S., Nikolić, G., Lanjevac, A., Ghgorić, M.,& Rajković, M.. (2007). The thermal degradation of aqueous polyurethanes with catalysts of different selectivity. in Progress in Organic Coatings
Elsevier Science Sa, Lausanne., 60(2), 112-116.
https://doi.org/10.1016/j.porgcoat.2007.07.004

Cakić S, Nikolić G, Lanjevac A, Ghgorić M, Rajković M. The thermal degradation of aqueous polyurethanes with catalysts of different selectivity. in Progress in Organic Coatings. 2007;60(2):112-116.
doi:10.1016/j.porgcoat.2007.07.004 .

Cakić, Suzana, Nikolić, Goran, Lanjevac, Aslav, Ghgorić, Miladin, Rajković, Miloš, "The thermal degradation of aqueous polyurethanes with catalysts of different selectivity" in Progress in Organic Coatings, 60, no. 2 (2007):112-116,
https://doi.org/10.1016/j.porgcoat.2007.07.004 . .

TY  - JOUR
AU  - Rajković, Miloš
AU  - Novaković, Ivana D.
PY  - 2007
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/1380
AB  - Potentiometric analysis of fluoride content (as F- ion) in solutions by using fluoride ion-selective electrode is simple, reliable and cheap. Very small concentrations of fluoride-ions (to 10-6 mol/dm3) can be determined by fluoride selective electrode, with regulation of ion strength of a solution and control of concentration of hydroxide ions and interfering ions of metals. The influence of pH and complexing ions of metals can be successfully regulated by the TISAB solution and by preserving pH value in the range from 5.00 to 7.00. The content of fluorides in the samples can be determined by the method of direct potentiometer, and in the case of very low concentration by standard addition method. In this paper it was analyzed the determination of fluoride ions concentration in bottled mineral waters and water from Belgrade plumbing in two Belgrade districts (Palilula and Novi Beograd) and in tea, by using the fluoride selective electrode. It was determined that the content of fluoride ions in bottled mineral water significantly differs from values given on declaration, and that content of fluoride ions varies over a period of time. The content of fluoride ions in water from plumbing in two Belgrade districts at the time of analysis was significantly increased and exceeded values given in Regulation for drinking water quality. The received results from the analysis of fluorides in teas show that fluorides exist in teas in different concentrations. There are also differences between the same kinds of tea, which is noted with mint (Mentha piperitae folium), as a consequence of differences between soils where it was planted. As taking of fluorides, according to World Health Organisation recommendation (WHO), is limited in the range from 2 to 4 mg per day, it is necessary to give the content of fluorides on all products that are used in human consumption.
AB  - Potenciometrijsko određivanje sadržaja fluorida (kao F-jon) u rastvorima upotrebom fluoridne jon-selektivne elektrode je jednostavno, pouzdano i jeftino. Fluorid-selektivnom elektrodom mogu se odrediti veoma niske koncentracije fluorid-jona (do 10-6 mol/dm3), uz regulisanje jonske jačine rastvora i kontrolisanje koncentracije hidroksid-jona i interferirajućih jona metala. Uticaj pH i kompleksirajućih jona metala može se uspešno regulisati rastvorom TISABa i održavanjem pH vrednosti u oblasti od 5,00 do 7,00. Sadržaj fluorida u uzorcima može se odrediti metodom direktne potenciometrije, a u slučaju veoma niskih koncentracije, metodom standardnog dodatka. U radu je vršeno određivanje koncentracije F--jona u flaširanim mineralnim vodama ('Vujić voda', 'Rosa', 'Duboka', 'Voda-voda', 'Aqua viva', 'Knjaz Miloš') i vodi iz beogradskog vodovoda sa dve beogradske opštine (Palilula i Novi Beograd) i u čajevima (Divlja nana (Mentha piperitae folium), Čaj od žalfije (Salviae officinalis), Čaj od kantariona (Hypericum perforatum), 'Domaća nana' (Mentha piperita L.), Čaj od kamilice (Chamomillae flos)), upotrebom fluorid-selektivne elektrode. Uočeno je da sadržaj fluorid-jona u flaširanim mineralnim vodama znatno odstupa od vrednosti koje su date na deklaraciji, ali i da sadržaj fluorid-jona varira tokom vremena. Sadržaj fluorid-jona u vodi iz vodovoda sa dve beogradske opštine, u vreme analiziranja je znatno povećan i premašuje vrednosti propisane Pravilnikom o kvalitetu vode za piće. Dobijeni rezultati ispitivanja fluorida u čajevima ukazuju da se fluoridi nalaze u čajevima u različitim koncentracijama. Do razlike dolazi i među istim vrstama čaja, što je zabeleženo kod nane (Mentha piperitae folium), što je posledica pre svega zemljišta na kojem je nana uzgajana. Kako je, saglasno preporukama Svetske zdravstvene organizacije (SZO), unošenje fluorida limitirano u opsegu 2 do 4 mg dnevno, na svim proizvodima koji se koriste u humanoj upotrebi potrebno je navesti i sadržaj fluorida.
PB  - Univerzitet u Beogradu - Poljoprivredni fakultet, Beograd
T2  - Journal of Agricultural Sciences (Belgrade)
T1  - Determination of fluoride content in drinking water and tea infusions using fluoride ion selective electrode
T1  - Određivanje sadržaja fluorida u vodi za piće i čajevima fluorid-selektivnom elektrodom
EP  - 168
IS  - 2
SP  - 155
VL  - 52
DO  - 10.2298/JAS0702155R
ER  - 

@article{
author = "Rajković, Miloš and Novaković, Ivana D.",
year = "2007",
abstract = "Potentiometric analysis of fluoride content (as F- ion) in solutions by using fluoride ion-selective electrode is simple, reliable and cheap. Very small concentrations of fluoride-ions (to 10-6 mol/dm3) can be determined by fluoride selective electrode, with regulation of ion strength of a solution and control of concentration of hydroxide ions and interfering ions of metals. The influence of pH and complexing ions of metals can be successfully regulated by the TISAB solution and by preserving pH value in the range from 5.00 to 7.00. The content of fluorides in the samples can be determined by the method of direct potentiometer, and in the case of very low concentration by standard addition method. In this paper it was analyzed the determination of fluoride ions concentration in bottled mineral waters and water from Belgrade plumbing in two Belgrade districts (Palilula and Novi Beograd) and in tea, by using the fluoride selective electrode. It was determined that the content of fluoride ions in bottled mineral water significantly differs from values given on declaration, and that content of fluoride ions varies over a period of time. The content of fluoride ions in water from plumbing in two Belgrade districts at the time of analysis was significantly increased and exceeded values given in Regulation for drinking water quality. The received results from the analysis of fluorides in teas show that fluorides exist in teas in different concentrations. There are also differences between the same kinds of tea, which is noted with mint (Mentha piperitae folium), as a consequence of differences between soils where it was planted. As taking of fluorides, according to World Health Organisation recommendation (WHO), is limited in the range from 2 to 4 mg per day, it is necessary to give the content of fluorides on all products that are used in human consumption., Potenciometrijsko određivanje sadržaja fluorida (kao F-jon) u rastvorima upotrebom fluoridne jon-selektivne elektrode je jednostavno, pouzdano i jeftino. Fluorid-selektivnom elektrodom mogu se odrediti veoma niske koncentracije fluorid-jona (do 10-6 mol/dm3), uz regulisanje jonske jačine rastvora i kontrolisanje koncentracije hidroksid-jona i interferirajućih jona metala. Uticaj pH i kompleksirajućih jona metala može se uspešno regulisati rastvorom TISABa i održavanjem pH vrednosti u oblasti od 5,00 do 7,00. Sadržaj fluorida u uzorcima može se odrediti metodom direktne potenciometrije, a u slučaju veoma niskih koncentracije, metodom standardnog dodatka. U radu je vršeno određivanje koncentracije F--jona u flaširanim mineralnim vodama ('Vujić voda', 'Rosa', 'Duboka', 'Voda-voda', 'Aqua viva', 'Knjaz Miloš') i vodi iz beogradskog vodovoda sa dve beogradske opštine (Palilula i Novi Beograd) i u čajevima (Divlja nana (Mentha piperitae folium), Čaj od žalfije (Salviae officinalis), Čaj od kantariona (Hypericum perforatum), 'Domaća nana' (Mentha piperita L.), Čaj od kamilice (Chamomillae flos)), upotrebom fluorid-selektivne elektrode. Uočeno je da sadržaj fluorid-jona u flaširanim mineralnim vodama znatno odstupa od vrednosti koje su date na deklaraciji, ali i da sadržaj fluorid-jona varira tokom vremena. Sadržaj fluorid-jona u vodi iz vodovoda sa dve beogradske opštine, u vreme analiziranja je znatno povećan i premašuje vrednosti propisane Pravilnikom o kvalitetu vode za piće. Dobijeni rezultati ispitivanja fluorida u čajevima ukazuju da se fluoridi nalaze u čajevima u različitim koncentracijama. Do razlike dolazi i među istim vrstama čaja, što je zabeleženo kod nane (Mentha piperitae folium), što je posledica pre svega zemljišta na kojem je nana uzgajana. Kako je, saglasno preporukama Svetske zdravstvene organizacije (SZO), unošenje fluorida limitirano u opsegu 2 do 4 mg dnevno, na svim proizvodima koji se koriste u humanoj upotrebi potrebno je navesti i sadržaj fluorida.",
publisher = "Univerzitet u Beogradu - Poljoprivredni fakultet, Beograd",
journal = "Journal of Agricultural Sciences (Belgrade)",
title = "Determination of fluoride content in drinking water and tea infusions using fluoride ion selective electrode, Određivanje sadržaja fluorida u vodi za piće i čajevima fluorid-selektivnom elektrodom",
pages = "168-155",
number = "2",
volume = "52",
doi = "10.2298/JAS0702155R"
}

Rajković, M.,& Novaković, I. D.. (2007). Determination of fluoride content in drinking water and tea infusions using fluoride ion selective electrode. in Journal of Agricultural Sciences (Belgrade)
Univerzitet u Beogradu - Poljoprivredni fakultet, Beograd., 52(2), 155-168.
https://doi.org/10.2298/JAS0702155R

Rajković M, Novaković ID. Determination of fluoride content in drinking water and tea infusions using fluoride ion selective electrode. in Journal of Agricultural Sciences (Belgrade). 2007;52(2):155-168.
doi:10.2298/JAS0702155R .

Rajković, Miloš, Novaković, Ivana D., "Determination of fluoride content in drinking water and tea infusions using fluoride ion selective electrode" in Journal of Agricultural Sciences (Belgrade), 52, no. 2 (2007):155-168,
https://doi.org/10.2298/JAS0702155R . .

TY  - JOUR
AU  - Cakić, Suzana
AU  - Nikolić, Goran
AU  - Lačnjevac, Časlav
AU  - Gligorić, Miladin
AU  - Stamenković, Jakov
AU  - Rajković, Miloš
AU  - Barać, Miroljub
PY  - 2006
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/1352
AB  - The thermal stability of aqueous polyurethanes has been measured applying the thermogravimetric analysis. The aqueous polyurethanes (aqPUR) with catalysts of different selectivity have been studied by use of the dynamic method. To obtain degradations of 0.025, 0.05, and 0.10, employing the dynamic method, the heating rates of 0.5, 1, 2, 5, and 10 degrees C min(-1) have been used in the range of 30-500 degrees C. Using the more selective catalysts in the aqueous polyurethanes, the total resulting time of the decompositon has been on the increase at all degrees of the degradation and at the particular starting temperature. This paper shows that the dynamic method based on the thermogravimetric analysis can be used to assess the thermal stability of the aqueous polyurethanes using the catalysts of different selectivity.
PB  - MDPI, BASEL
T2  - Sensors
T1  - Thermal stability of aqueous polyurethanes depending on the applied catalysts
EP  - 1707
IS  - 11
SP  - 1697
VL  - 6
DO  - 10.3390/s6111697
ER  - 

@article{
author = "Cakić, Suzana and Nikolić, Goran and Lačnjevac, Časlav and Gligorić, Miladin and Stamenković, Jakov and Rajković, Miloš and Barać, Miroljub",
year = "2006",
abstract = "The thermal stability of aqueous polyurethanes has been measured applying the thermogravimetric analysis. The aqueous polyurethanes (aqPUR) with catalysts of different selectivity have been studied by use of the dynamic method. To obtain degradations of 0.025, 0.05, and 0.10, employing the dynamic method, the heating rates of 0.5, 1, 2, 5, and 10 degrees C min(-1) have been used in the range of 30-500 degrees C. Using the more selective catalysts in the aqueous polyurethanes, the total resulting time of the decompositon has been on the increase at all degrees of the degradation and at the particular starting temperature. This paper shows that the dynamic method based on the thermogravimetric analysis can be used to assess the thermal stability of the aqueous polyurethanes using the catalysts of different selectivity.",
publisher = "MDPI, BASEL",
journal = "Sensors",
title = "Thermal stability of aqueous polyurethanes depending on the applied catalysts",
pages = "1707-1697",
number = "11",
volume = "6",
doi = "10.3390/s6111697"
}

Cakić, S., Nikolić, G., Lačnjevac, Č., Gligorić, M., Stamenković, J., Rajković, M.,& Barać, M.. (2006). Thermal stability of aqueous polyurethanes depending on the applied catalysts. in Sensors
MDPI, BASEL., 6(11), 1697-1707.
https://doi.org/10.3390/s6111697

Cakić S, Nikolić G, Lačnjevac Č, Gligorić M, Stamenković J, Rajković M, Barać M. Thermal stability of aqueous polyurethanes depending on the applied catalysts. in Sensors. 2006;6(11):1697-1707.
doi:10.3390/s6111697 .

Cakić, Suzana, Nikolić, Goran, Lačnjevac, Časlav, Gligorić, Miladin, Stamenković, Jakov, Rajković, Miloš, Barać, Miroljub, "Thermal stability of aqueous polyurethanes depending on the applied catalysts" in Sensors, 6, no. 11 (2006):1697-1707,
https://doi.org/10.3390/s6111697 . .

TY  - JOUR
AU  - Cakić, Suzana
AU  - Lačnjevac, Časlav
AU  - Nikolić, Goran
AU  - Stamenković, Jakov
AU  - Rajković, Miloš
AU  - Gligorić, Miladin
AU  - Barać, Miroljub
PY  - 2006
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/1338
AB  - The latest investigations on producing more efficient catalytic aqueous polyurethane systems are in the domain of metal complexes with mixed ligands. In our previous research works, the high selectivity for the isocyanate-hydroxyl reaction in aqueous polyurethane systems has been shown by the manganese(III) mixed-ligand complexes. The two new complexes have been prepared with two acetylacetonate (acac) ligands and one maleate ligand and its hydroxylamine derivative of the general formula [Mn(C5H7O2)(2)L]. Their structures have been established by using the fundamental analyses, the FTIR and UV/VIS spectroscopic methods, as well as the magnetic measurements. In order to explain the different selectivity of the manganese(III) mixed-ligand complexes, the UV and ESR spectroscopy have been employed to determine the kinetics of the complexes' decomposition. The thermal stability of the complexes has been determined by way of the dynamic TG method at the heating rate of 5 degrees C.min(-1) and at the temperature ranged 20-550 degrees C. It suggests the decomposition of the complexes by loss of acid ligand. The main factor in the selective catalysis control in the aqueous polyurethane systems is the nature of the acid ligands and their impact on the manganese(II)/manganese(III) equilibrium.
PB  - MDPI, BASEL
T2  - Sensors
T1  - Spectroscopic characteristics of highly selective manganese catalysis in acqueous polyurethane systems
EP  - 1720
IS  - 11
SP  - 1708
VL  - 6
DO  - 10.3390/s6111708
ER  - 

@article{
author = "Cakić, Suzana and Lačnjevac, Časlav and Nikolić, Goran and Stamenković, Jakov and Rajković, Miloš and Gligorić, Miladin and Barać, Miroljub",
year = "2006",
abstract = "The latest investigations on producing more efficient catalytic aqueous polyurethane systems are in the domain of metal complexes with mixed ligands. In our previous research works, the high selectivity for the isocyanate-hydroxyl reaction in aqueous polyurethane systems has been shown by the manganese(III) mixed-ligand complexes. The two new complexes have been prepared with two acetylacetonate (acac) ligands and one maleate ligand and its hydroxylamine derivative of the general formula [Mn(C5H7O2)(2)L]. Their structures have been established by using the fundamental analyses, the FTIR and UV/VIS spectroscopic methods, as well as the magnetic measurements. In order to explain the different selectivity of the manganese(III) mixed-ligand complexes, the UV and ESR spectroscopy have been employed to determine the kinetics of the complexes' decomposition. The thermal stability of the complexes has been determined by way of the dynamic TG method at the heating rate of 5 degrees C.min(-1) and at the temperature ranged 20-550 degrees C. It suggests the decomposition of the complexes by loss of acid ligand. The main factor in the selective catalysis control in the aqueous polyurethane systems is the nature of the acid ligands and their impact on the manganese(II)/manganese(III) equilibrium.",
publisher = "MDPI, BASEL",
journal = "Sensors",
title = "Spectroscopic characteristics of highly selective manganese catalysis in acqueous polyurethane systems",
pages = "1720-1708",
number = "11",
volume = "6",
doi = "10.3390/s6111708"
}

Cakić, S., Lačnjevac, Č., Nikolić, G., Stamenković, J., Rajković, M., Gligorić, M.,& Barać, M.. (2006). Spectroscopic characteristics of highly selective manganese catalysis in acqueous polyurethane systems. in Sensors
MDPI, BASEL., 6(11), 1708-1720.
https://doi.org/10.3390/s6111708

Cakić S, Lačnjevac Č, Nikolić G, Stamenković J, Rajković M, Gligorić M, Barać M. Spectroscopic characteristics of highly selective manganese catalysis in acqueous polyurethane systems. in Sensors. 2006;6(11):1708-1720.
doi:10.3390/s6111708 .

Cakić, Suzana, Lačnjevac, Časlav, Nikolić, Goran, Stamenković, Jakov, Rajković, Miloš, Gligorić, Miladin, Barać, Miroljub, "Spectroscopic characteristics of highly selective manganese catalysis in acqueous polyurethane systems" in Sensors, 6, no. 11 (2006):1708-1720,
https://doi.org/10.3390/s6111708 . .

TY  - JOUR
AU  - Cakić, Suzana
AU  - Lačnjevac, Časlav
AU  - Rajković, Miloš
AU  - Rasković, Ljiljana
AU  - Stamenković, Jakov
PY  - 2006
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/1348
AB  - The DSC method has been employed to monitor the kinetics of reticulation of aqueous polyurethane systems without catalysts, and with the commercial catalyst of zirconium (CAT(R) XC- 6212) and the highly selective manganese catalyst, the complex Mn(III)diacetylacetonemaleinate (MAM). Among the polyol components, the acrylic emulsions were used for reticulation in this research, and as suitable reticulation agents the water emulsible aliphatic polyisocyanates based on hexamethylendoisocyanate with the different contents of NCO-groups were employed. On the basis of DSC analysis, applying the methods of Kissinger, Freeman-Carroll and Crane-Ellerstein the pseudo kinetic parameters of the reticulation reaction of aqueous systems were determined. The temperature of the examination ranged from 50 degrees C to 450 degrees C with the heat rate of 0.5 degrees C/min. The reduction of the activation energy and the increase of the standard deviation indicate the catalytic action of the selective catalysts of zirconium and manganese. The impact of the catalysts on the reduction of the activation energy is the strongest when using the catalysts of manganese and applying all the three afore-said methods. The least aberrations among the stated methods in defining the kinetic parameters were obtained by using the manganese catalyst.
PB  - MDPI, BASEL
T2  - Sensors
T1  - Reticulation of aqueous polyurethane systems controlled by DSC method
EP  - 545
IS  - 5
SP  - 536
VL  - 6
DO  - 10.3390/s6050536
ER  - 

@article{
author = "Cakić, Suzana and Lačnjevac, Časlav and Rajković, Miloš and Rasković, Ljiljana and Stamenković, Jakov",
year = "2006",
abstract = "The DSC method has been employed to monitor the kinetics of reticulation of aqueous polyurethane systems without catalysts, and with the commercial catalyst of zirconium (CAT(R) XC- 6212) and the highly selective manganese catalyst, the complex Mn(III)diacetylacetonemaleinate (MAM). Among the polyol components, the acrylic emulsions were used for reticulation in this research, and as suitable reticulation agents the water emulsible aliphatic polyisocyanates based on hexamethylendoisocyanate with the different contents of NCO-groups were employed. On the basis of DSC analysis, applying the methods of Kissinger, Freeman-Carroll and Crane-Ellerstein the pseudo kinetic parameters of the reticulation reaction of aqueous systems were determined. The temperature of the examination ranged from 50 degrees C to 450 degrees C with the heat rate of 0.5 degrees C/min. The reduction of the activation energy and the increase of the standard deviation indicate the catalytic action of the selective catalysts of zirconium and manganese. The impact of the catalysts on the reduction of the activation energy is the strongest when using the catalysts of manganese and applying all the three afore-said methods. The least aberrations among the stated methods in defining the kinetic parameters were obtained by using the manganese catalyst.",
publisher = "MDPI, BASEL",
journal = "Sensors",
title = "Reticulation of aqueous polyurethane systems controlled by DSC method",
pages = "545-536",
number = "5",
volume = "6",
doi = "10.3390/s6050536"
}

Cakić, S., Lačnjevac, Č., Rajković, M., Rasković, L.,& Stamenković, J.. (2006). Reticulation of aqueous polyurethane systems controlled by DSC method. in Sensors
MDPI, BASEL., 6(5), 536-545.
https://doi.org/10.3390/s6050536

Cakić S, Lačnjevac Č, Rajković M, Rasković L, Stamenković J. Reticulation of aqueous polyurethane systems controlled by DSC method. in Sensors. 2006;6(5):536-545.
doi:10.3390/s6050536 .

Cakić, Suzana, Lačnjevac, Časlav, Rajković, Miloš, Rasković, Ljiljana, Stamenković, Jakov, "Reticulation of aqueous polyurethane systems controlled by DSC method" in Sensors, 6, no. 5 (2006):536-545,
https://doi.org/10.3390/s6050536 . .