TY  - JOUR
AU  - Tošković, Nemanja
AU  - Rajić, Danijela
AU  - Vasiljević, Ljubica
AU  - Tošković, Dragan
AU  - Rajković, Miloš
PY  - 2018
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/4843
AB  - In this paper, the combination of FA (Flame Analysis of Noble Metals - Cupellation) and ICP/AES (Atomic Emission Spectrometry with Induction Coupled Plasma) methods for determination of Au and Ag in geological samples of iron ore-magnetite was presented. Au and Ag were concentrated with Pb from PbO after desulphurisation and melting process (Pb2+→Pb). Regulus (Pb with noble metals) is then cupellated. The resulting bead-pril after cupellation was dissolved in HNO3 and then in HCl (imperial water: 2HNO3 and 6HCl). After the preparation of standard solutions and a blank test, the ICP/AES recording is performed. The obtained results were compared with those obtained by the classical method of cupellation. The advantages of ICP/AES are excellent detection limits and linear dynamic range as well as a stable and repeating signal which is particularly important for samples of iron tested due to the low content of noble metals.
AB  - U ovom radu je prikazana kombinacija FA (plamena analiza plemenitih metala-kupelacija) i ICP/AES (atomska emisiona spektrometrija sa indukovanom kuplovanom plazmom) metoda za određivanje Au i Ag u geološkim uzorcima rude gvožđa-magnetit. Au i Agse koncentišu sa Pb iz PbOnakon procesa odsumporavanja i topljenja (Pb2+→Pb).Regulus (Pb sa Au i Ag)se kupelira. Dobijena perla-pril nakon kupelacije se rastvara u HNO3 a zatim u HCl(carska voda 2HNO3: 6HCl). Nakon pripreme standardnih rastvora i blank probe vrši se snimanje na ICP/AES. Dobijeni rezultati su poređeni sa rezultatima dobijenim klasičnom metodom kupelacije. Prednosti ICP/AES su odlične granice detekcije i linearni dinamički opseg kao i stabilan i ponovljiv signal što je posebno bitno za uzorke ispitivane rude gvožđa zbog malog sadržaja plemenitih metala.
PB  - Inženjersko društvo za koroziju, Beograd
T2  - Zaštita materijala
T1  - Determination of Au and Ag from iron ores combining FA and ICP/AES methods
T1  - Određivanje Au i Ag iz rude gvožđa kombinovanjem FA i ICP/AES metoda
EP  - 81
IS  - 1
SP  - 77
VL  - 59
DO  - 10.5937/ZasMat1801079T
ER  - 

@article{
author = "Tošković, Nemanja and Rajić, Danijela and Vasiljević, Ljubica and Tošković, Dragan and Rajković, Miloš",
year = "2018",
abstract = "In this paper, the combination of FA (Flame Analysis of Noble Metals - Cupellation) and ICP/AES (Atomic Emission Spectrometry with Induction Coupled Plasma) methods for determination of Au and Ag in geological samples of iron ore-magnetite was presented. Au and Ag were concentrated with Pb from PbO after desulphurisation and melting process (Pb2+→Pb). Regulus (Pb with noble metals) is then cupellated. The resulting bead-pril after cupellation was dissolved in HNO3 and then in HCl (imperial water: 2HNO3 and 6HCl). After the preparation of standard solutions and a blank test, the ICP/AES recording is performed. The obtained results were compared with those obtained by the classical method of cupellation. The advantages of ICP/AES are excellent detection limits and linear dynamic range as well as a stable and repeating signal which is particularly important for samples of iron tested due to the low content of noble metals., U ovom radu je prikazana kombinacija FA (plamena analiza plemenitih metala-kupelacija) i ICP/AES (atomska emisiona spektrometrija sa indukovanom kuplovanom plazmom) metoda za određivanje Au i Ag u geološkim uzorcima rude gvožđa-magnetit. Au i Agse koncentišu sa Pb iz PbOnakon procesa odsumporavanja i topljenja (Pb2+→Pb).Regulus (Pb sa Au i Ag)se kupelira. Dobijena perla-pril nakon kupelacije se rastvara u HNO3 a zatim u HCl(carska voda 2HNO3: 6HCl). Nakon pripreme standardnih rastvora i blank probe vrši se snimanje na ICP/AES. Dobijeni rezultati su poređeni sa rezultatima dobijenim klasičnom metodom kupelacije. Prednosti ICP/AES su odlične granice detekcije i linearni dinamički opseg kao i stabilan i ponovljiv signal što je posebno bitno za uzorke ispitivane rude gvožđa zbog malog sadržaja plemenitih metala.",
publisher = "Inženjersko društvo za koroziju, Beograd",
journal = "Zaštita materijala",
title = "Determination of Au and Ag from iron ores combining FA and ICP/AES methods, Određivanje Au i Ag iz rude gvožđa kombinovanjem FA i ICP/AES metoda",
pages = "81-77",
number = "1",
volume = "59",
doi = "10.5937/ZasMat1801079T"
}

Tošković, N., Rajić, D., Vasiljević, L., Tošković, D.,& Rajković, M.. (2018). Determination of Au and Ag from iron ores combining FA and ICP/AES methods. in Zaštita materijala
Inženjersko društvo za koroziju, Beograd., 59(1), 77-81.
https://doi.org/10.5937/ZasMat1801079T

Tošković N, Rajić D, Vasiljević L, Tošković D, Rajković M. Determination of Au and Ag from iron ores combining FA and ICP/AES methods. in Zaštita materijala. 2018;59(1):77-81.
doi:10.5937/ZasMat1801079T .

Tošković, Nemanja, Rajić, Danijela, Vasiljević, Ljubica, Tošković, Dragan, Rajković, Miloš, "Determination of Au and Ag from iron ores combining FA and ICP/AES methods" in Zaštita materijala, 59, no. 1 (2018):77-81,
https://doi.org/10.5937/ZasMat1801079T . .

TY  - JOUR
AU  - Tošković, Dragan V.
AU  - Rajković, Miloš
AU  - Tomić, Milorad V.
AU  - Tošković, Nemanja D.
AU  - Rajić, Danijela Z.
PY  - 2016
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/4288
AB  - This paper presents the results of testing the corrosion resistance of austenitic chromium-nickel steel X6 CrNiTi 18-10 and X6 CrNiNb 18-10 in solutions of calcium hypochlorite. For the tests were used potentiodynamic measurement methods. By graphical method of linear polarization, corrosion currents and corrosion potential were obtained on the intersection of the Tafel real E = f(log i) on the basis of potentiodynamic curves for the examined steels. The comparative method to determine the corrosion current density is the polarization resistance method. Based on corrosion currents were calculated corrosion rate of tested steel. Anodic polarization curves for both austenitic steel in the investigated solutions were shot in the interval of stationary potential of up to + 2.5V, to determine the areas of activity. Test results show that with increasing of calcium hypochlorite solution concentration, increase the pH of the solution and the concentration of active chlorine which causes a reduction in the corrosion resistance of the tested steel. These steels are resistant to corrosion in a 1% solution, stable in 10% solutions, and less resistant in 50% suspensions of calcium hypochlorite.
AB  - U ovom radu dati su rezultati ispitivanja korozione otpornosti austenitnih hrom-nikl čelika Č 4572 i Č 4583 u rastvorima kalcijum-hipohloriita. Za ispitivanja su korišćene potenciodinamičke metode merenja. Grafičkom metodom linearne polarizacije koroziona struja i korozioni potencijal dobijani su u preseku Tafelovih pravih E = f(log i) na osnovu potenciodinamičkih krivih za ispitivane čelike. Komparativna metoda za određivanje korozione struje je metoda polarizacionog otpora. Na osnovu korozionih struja, izračunate su brzine korozije ispitivanih čelika. Anodne polarizacione krive za oba austenitna čelika u ispitivanim rastvorima snimane su u intervalu potencijala od stacionarnog do +2,5V, da bi se odredila područja aktivnosti. Rezultati ispitivanja pokazuju da sa porastom koncentracije rastvora kalcijum-hipohlorita, raste rN vrednost rastvora i koncentracija aktivnog hlora što izaziva smanjenje korozione otpornosti ispitivanih čelika. Ovi čelici su otporni na koroziju u 1% - nim rastvorima, postojani u 10% - nim rastvorima i manje otporni u 50% - nim suspenzijama kalcijum - hipohlorita.
PB  - Inženjersko društvo za koroziju, Beograd
T2  - Zaštita materijala
T1  - Corrosion rate determination of austenic steels in calcium hypochlorite solutions
T1  - Određivanje brzine korozije austentnih čelika u rastvorima kalcijum-hipohlorita
EP  - 304
IS  - 2
SP  - 296
VL  - 57
DO  - 10.5937/ZasMat1602296T
ER  - 

@article{
author = "Tošković, Dragan V. and Rajković, Miloš and Tomić, Milorad V. and Tošković, Nemanja D. and Rajić, Danijela Z.",
year = "2016",
abstract = "This paper presents the results of testing the corrosion resistance of austenitic chromium-nickel steel X6 CrNiTi 18-10 and X6 CrNiNb 18-10 in solutions of calcium hypochlorite. For the tests were used potentiodynamic measurement methods. By graphical method of linear polarization, corrosion currents and corrosion potential were obtained on the intersection of the Tafel real E = f(log i) on the basis of potentiodynamic curves for the examined steels. The comparative method to determine the corrosion current density is the polarization resistance method. Based on corrosion currents were calculated corrosion rate of tested steel. Anodic polarization curves for both austenitic steel in the investigated solutions were shot in the interval of stationary potential of up to + 2.5V, to determine the areas of activity. Test results show that with increasing of calcium hypochlorite solution concentration, increase the pH of the solution and the concentration of active chlorine which causes a reduction in the corrosion resistance of the tested steel. These steels are resistant to corrosion in a 1% solution, stable in 10% solutions, and less resistant in 50% suspensions of calcium hypochlorite., U ovom radu dati su rezultati ispitivanja korozione otpornosti austenitnih hrom-nikl čelika Č 4572 i Č 4583 u rastvorima kalcijum-hipohloriita. Za ispitivanja su korišćene potenciodinamičke metode merenja. Grafičkom metodom linearne polarizacije koroziona struja i korozioni potencijal dobijani su u preseku Tafelovih pravih E = f(log i) na osnovu potenciodinamičkih krivih za ispitivane čelike. Komparativna metoda za određivanje korozione struje je metoda polarizacionog otpora. Na osnovu korozionih struja, izračunate su brzine korozije ispitivanih čelika. Anodne polarizacione krive za oba austenitna čelika u ispitivanim rastvorima snimane su u intervalu potencijala od stacionarnog do +2,5V, da bi se odredila područja aktivnosti. Rezultati ispitivanja pokazuju da sa porastom koncentracije rastvora kalcijum-hipohlorita, raste rN vrednost rastvora i koncentracija aktivnog hlora što izaziva smanjenje korozione otpornosti ispitivanih čelika. Ovi čelici su otporni na koroziju u 1% - nim rastvorima, postojani u 10% - nim rastvorima i manje otporni u 50% - nim suspenzijama kalcijum - hipohlorita.",
publisher = "Inženjersko društvo za koroziju, Beograd",
journal = "Zaštita materijala",
title = "Corrosion rate determination of austenic steels in calcium hypochlorite solutions, Određivanje brzine korozije austentnih čelika u rastvorima kalcijum-hipohlorita",
pages = "304-296",
number = "2",
volume = "57",
doi = "10.5937/ZasMat1602296T"
}

Tošković, D. V., Rajković, M., Tomić, M. V., Tošković, N. D.,& Rajić, D. Z.. (2016). Corrosion rate determination of austenic steels in calcium hypochlorite solutions. in Zaštita materijala
Inženjersko društvo za koroziju, Beograd., 57(2), 296-304.
https://doi.org/10.5937/ZasMat1602296T

Tošković DV, Rajković M, Tomić MV, Tošković ND, Rajić DZ. Corrosion rate determination of austenic steels in calcium hypochlorite solutions. in Zaštita materijala. 2016;57(2):296-304.
doi:10.5937/ZasMat1602296T .

Tošković, Dragan V., Rajković, Miloš, Tomić, Milorad V., Tošković, Nemanja D., Rajić, Danijela Z., "Corrosion rate determination of austenic steels in calcium hypochlorite solutions" in Zaštita materijala, 57, no. 2 (2016):296-304,
https://doi.org/10.5937/ZasMat1602296T . .