TY  - JOUR
AU  - Maksimović, Jelena
AU  - Kolar-Anić, Ljiljana
AU  - Anić, Slobodan
AU  - Ribić, Dragana D.
AU  - Pejić, Nataša
PY  - 2011
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/1536
AB  - A novel procedure for kinetic determination of some water-soluble vitamins of the B-group (thiamine (B-1), riboflavin (B-2), niacin (B-3) and pyridoxine (B-6)) by the concentration perturbations of the Bray-Liebhafsky (BL) oscillatory chemical system involving the catalytic decomposition of hydrogen peroxide in the presence of both hydrogen and iodate ions is proposed and validated. The method uses a Pt electrode for potentiometric monitoring of the concentration perturbations of the BL matrix in a stable non-equilibrium stationary state close to the bifurcation point. The proposed method relies on the linear relationship between maximal potential displacements, Delta E-m, caused by the additional known quantities of a B species. Under the optimal established analytical conditions, linear calibration curves were obtained over the range of 0.01-1.0, 0.016-0.128, 5.0-50.0 and 0.05-2.5 mu mol with the limits of detection of 0.01, 0.018, 2.6 and 0.03 mu mol, as well as analytical throughput of 30, 5, 12 and 20 determinations per hour, for B-1, B-2, B-3 and B-6, respectively. The used technical approach also provides simple, effective and convenient method to assay the pharmaceutical formulations containing B-1 together with other active principles such as nicotinamide and vitamin B-12 as well as B-3.
PB  - Soc Brasileira Quimica, Sao Paulo
T2  - Journal of the Brazilian Chemical Society
T1  - Quantitative Determination of Some Water-Soluble B Vitamins by Kinetic Analytical Method Based on the Perturbation of an Oscillatory Reaction
VL  - 22
IS  - 1
SP  - 38
EP  - 48
UR  - https://hdl.handle.net/21.15107/rcub_farfar_1536
ER  - 

@article{
author = "Maksimović, Jelena and Kolar-Anić, Ljiljana and Anić, Slobodan and Ribić, Dragana D. and Pejić, Nataša",
year = "2011",
abstract = "A novel procedure for kinetic determination of some water-soluble vitamins of the B-group (thiamine (B-1), riboflavin (B-2), niacin (B-3) and pyridoxine (B-6)) by the concentration perturbations of the Bray-Liebhafsky (BL) oscillatory chemical system involving the catalytic decomposition of hydrogen peroxide in the presence of both hydrogen and iodate ions is proposed and validated. The method uses a Pt electrode for potentiometric monitoring of the concentration perturbations of the BL matrix in a stable non-equilibrium stationary state close to the bifurcation point. The proposed method relies on the linear relationship between maximal potential displacements, Delta E-m, caused by the additional known quantities of a B species. Under the optimal established analytical conditions, linear calibration curves were obtained over the range of 0.01-1.0, 0.016-0.128, 5.0-50.0 and 0.05-2.5 mu mol with the limits of detection of 0.01, 0.018, 2.6 and 0.03 mu mol, as well as analytical throughput of 30, 5, 12 and 20 determinations per hour, for B-1, B-2, B-3 and B-6, respectively. The used technical approach also provides simple, effective and convenient method to assay the pharmaceutical formulations containing B-1 together with other active principles such as nicotinamide and vitamin B-12 as well as B-3.",
publisher = "Soc Brasileira Quimica, Sao Paulo",
journal = "Journal of the Brazilian Chemical Society",
title = "Quantitative Determination of Some Water-Soluble B Vitamins by Kinetic Analytical Method Based on the Perturbation of an Oscillatory Reaction",
volume = "22",
number = "1",
pages = "38-48",
url = "https://hdl.handle.net/21.15107/rcub_farfar_1536"
}

Maksimović, J., Kolar-Anić, L., Anić, S., Ribić, D. D.,& Pejić, N.. (2011). Quantitative Determination of Some Water-Soluble B Vitamins by Kinetic Analytical Method Based on the Perturbation of an Oscillatory Reaction. in Journal of the Brazilian Chemical Society
Soc Brasileira Quimica, Sao Paulo., 22(1), 38-48.
https://hdl.handle.net/21.15107/rcub_farfar_1536

Maksimović J, Kolar-Anić L, Anić S, Ribić DD, Pejić N. Quantitative Determination of Some Water-Soluble B Vitamins by Kinetic Analytical Method Based on the Perturbation of an Oscillatory Reaction. in Journal of the Brazilian Chemical Society. 2011;22(1):38-48.
https://hdl.handle.net/21.15107/rcub_farfar_1536 .

Maksimović, Jelena, Kolar-Anić, Ljiljana, Anić, Slobodan, Ribić, Dragana D., Pejić, Nataša, "Quantitative Determination of Some Water-Soluble B Vitamins by Kinetic Analytical Method Based on the Perturbation of an Oscillatory Reaction" in Journal of the Brazilian Chemical Society, 22, no. 1 (2011):38-48,
https://hdl.handle.net/21.15107/rcub_farfar_1536 .

TY  - JOUR
AU  - Pejić, Nataša
AU  - Maksimović, Jelena
AU  - Ribić, Dragana D.
AU  - Kolar-Anić, Ljiljana
PY  - 2009
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/1259
AB  - Dynamic behavior of hydrogen peroxide decomposition catalyzed by iodate and hydrogen ions (the Bray-Liebhafsky reaction), in a continuous stirred tank reactor is investigated. The experimental results are obtained at one operational point in concentration phase space by varying mixed inflow concentrations of the sulfuric acid. The experimental evidences for the onset and termination of oscillatory behavior via the saddle node infinite period bifurcation as well as some kind of the Andronov-Hopf bifurcation are presented. In addition, the possibility of excitability of a stable steady state by thiamine was observed.
PB  - Maik Nauka/Interperiodica/Springer, New York
T2  - SAR and QSAR in Environmental Research
T1  - Dynamic states of the Bray-Liebhafsky reaction when sulfuric acid is the control parameter
VL  - 83
IS  - 9
SP  - 1490
EP  - 1495
DO  - 10.1134/S0036024409090131
ER  - 

@article{
author = "Pejić, Nataša and Maksimović, Jelena and Ribić, Dragana D. and Kolar-Anić, Ljiljana",
year = "2009",
abstract = "Dynamic behavior of hydrogen peroxide decomposition catalyzed by iodate and hydrogen ions (the Bray-Liebhafsky reaction), in a continuous stirred tank reactor is investigated. The experimental results are obtained at one operational point in concentration phase space by varying mixed inflow concentrations of the sulfuric acid. The experimental evidences for the onset and termination of oscillatory behavior via the saddle node infinite period bifurcation as well as some kind of the Andronov-Hopf bifurcation are presented. In addition, the possibility of excitability of a stable steady state by thiamine was observed.",
publisher = "Maik Nauka/Interperiodica/Springer, New York",
journal = "SAR and QSAR in Environmental Research",
title = "Dynamic states of the Bray-Liebhafsky reaction when sulfuric acid is the control parameter",
volume = "83",
number = "9",
pages = "1490-1495",
doi = "10.1134/S0036024409090131"
}

Pejić, N., Maksimović, J., Ribić, D. D.,& Kolar-Anić, L.. (2009). Dynamic states of the Bray-Liebhafsky reaction when sulfuric acid is the control parameter. in SAR and QSAR in Environmental Research
Maik Nauka/Interperiodica/Springer, New York., 83(9), 1490-1495.
https://doi.org/10.1134/S0036024409090131

Pejić N, Maksimović J, Ribić DD, Kolar-Anić L. Dynamic states of the Bray-Liebhafsky reaction when sulfuric acid is the control parameter. in SAR and QSAR in Environmental Research. 2009;83(9):1490-1495.
doi:10.1134/S0036024409090131 .

Pejić, Nataša, Maksimović, Jelena, Ribić, Dragana D., Kolar-Anić, Ljiljana, "Dynamic states of the Bray-Liebhafsky reaction when sulfuric acid is the control parameter" in SAR and QSAR in Environmental Research, 83, no. 9 (2009):1490-1495,
https://doi.org/10.1134/S0036024409090131 . .