TY  - JOUR
AU  - Kuntić, Vesna
AU  - Malešev, Dušan
AU  - Radović, Z
AU  - Vukojević, Vladana
PY  - 2000
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/233
AB  - In the present work, rutin (3,3',4',5,7-pentahydrohyflavone-3-rhamnoglucoside) was determinated via a complexing reaction with a titanyloxalate anion. K-2[TiO(C2O4)(2)] and rutin react in 50% ethanol forming a 1:2 complex in a pH range from 4.00 to 11.50, in which the TiO(C2O4)(2)(2-) ion is linked to rutin through the 4-carbonyl and 5-hydroxyl group. The thermodynamic stability constant log beta(2)(0) of the complex is determined to 10.80 at pH = 6.50. The change of the standard Gibbs free energy Delta G(0) amounts to -61 kJ . mol(-1), indicating that the process of complex formation is spontaneous. The optimal conditions for the spectrophotometric determination of microconcentrations of rutin are at pH = 6.40 and lambda = 430 nm, where the complex shows an absorption maximum with a molar absorption coefficient a(430) = (60+/-2) . 10(3) dm(3) . mol(-1) . cm(-1). The method is applied rutin determination from tablets.
PB  - Springer-Verlag Wien, Vienna
T2  - Monatshefte für Chemie Chemical Monthly
T1  - Spectrophotometric investigation of the complexing reaction between rutin and titanyloxalate anion in 50% ethanol
VL  - 131
IS  - 7
SP  - 769
EP  - 777
DO  - 10.1007/s007060050024
ER  - 

@article{
author = "Kuntić, Vesna and Malešev, Dušan and Radović, Z and Vukojević, Vladana",
year = "2000",
abstract = "In the present work, rutin (3,3',4',5,7-pentahydrohyflavone-3-rhamnoglucoside) was determinated via a complexing reaction with a titanyloxalate anion. K-2[TiO(C2O4)(2)] and rutin react in 50% ethanol forming a 1:2 complex in a pH range from 4.00 to 11.50, in which the TiO(C2O4)(2)(2-) ion is linked to rutin through the 4-carbonyl and 5-hydroxyl group. The thermodynamic stability constant log beta(2)(0) of the complex is determined to 10.80 at pH = 6.50. The change of the standard Gibbs free energy Delta G(0) amounts to -61 kJ . mol(-1), indicating that the process of complex formation is spontaneous. The optimal conditions for the spectrophotometric determination of microconcentrations of rutin are at pH = 6.40 and lambda = 430 nm, where the complex shows an absorption maximum with a molar absorption coefficient a(430) = (60+/-2) . 10(3) dm(3) . mol(-1) . cm(-1). The method is applied rutin determination from tablets.",
publisher = "Springer-Verlag Wien, Vienna",
journal = "Monatshefte für Chemie Chemical Monthly",
title = "Spectrophotometric investigation of the complexing reaction between rutin and titanyloxalate anion in 50% ethanol",
volume = "131",
number = "7",
pages = "769-777",
doi = "10.1007/s007060050024"
}

Kuntić, V., Malešev, D., Radović, Z.,& Vukojević, V.. (2000). Spectrophotometric investigation of the complexing reaction between rutin and titanyloxalate anion in 50% ethanol. in Monatshefte für Chemie Chemical Monthly
Springer-Verlag Wien, Vienna., 131(7), 769-777.
https://doi.org/10.1007/s007060050024

Kuntić V, Malešev D, Radović Z, Vukojević V. Spectrophotometric investigation of the complexing reaction between rutin and titanyloxalate anion in 50% ethanol. in Monatshefte für Chemie Chemical Monthly. 2000;131(7):769-777.
doi:10.1007/s007060050024 .

Kuntić, Vesna, Malešev, Dušan, Radović, Z, Vukojević, Vladana, "Spectrophotometric investigation of the complexing reaction between rutin and titanyloxalate anion in 50% ethanol" in Monatshefte für Chemie Chemical Monthly, 131, no. 7 (2000):769-777,
https://doi.org/10.1007/s007060050024 . .

TY  - JOUR
AU  - Kuntić, Vesna
AU  - Blagojević, S.
AU  - Malešev, Dušan
AU  - Radović, Z
PY  - 1999
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/229
PB  - Govi-Verlag Gmbh, Eschborn
T2  - Pharmazie
T1  - Spectrophotometric investigation of the Cu(II)-hesperidin complex
VL  - 54
IS  - 7
SP  - 548
EP  - 548
UR  - https://hdl.handle.net/21.15107/rcub_farfar_229
ER  - 

@article{
author = "Kuntić, Vesna and Blagojević, S. and Malešev, Dušan and Radović, Z",
year = "1999",
publisher = "Govi-Verlag Gmbh, Eschborn",
journal = "Pharmazie",
title = "Spectrophotometric investigation of the Cu(II)-hesperidin complex",
volume = "54",
number = "7",
pages = "548-548",
url = "https://hdl.handle.net/21.15107/rcub_farfar_229"
}

Kuntić, V., Blagojević, S., Malešev, D.,& Radović, Z.. (1999). Spectrophotometric investigation of the Cu(II)-hesperidin complex. in Pharmazie
Govi-Verlag Gmbh, Eschborn., 54(7), 548-548.
https://hdl.handle.net/21.15107/rcub_farfar_229

Kuntić V, Blagojević S, Malešev D, Radović Z. Spectrophotometric investigation of the Cu(II)-hesperidin complex. in Pharmazie. 1999;54(7):548-548.
https://hdl.handle.net/21.15107/rcub_farfar_229 .

Kuntić, Vesna, Blagojević, S., Malešev, Dušan, Radović, Z, "Spectrophotometric investigation of the Cu(II)-hesperidin complex" in Pharmazie, 54, no. 7 (1999):548-548,
https://hdl.handle.net/21.15107/rcub_farfar_229 .

TY  - JOUR
AU  - Kuntić, Vesna
AU  - Blagojević, S.
AU  - Malešev, Dušan
AU  - Radović, Z
AU  - Bogavac, M
PY  - 1998
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/178
AB  - Composition and stability constant of the Pd(II)-quercetin complex were determined by suitable spectrophotometric methods and pH-metric measurements in 50% Ethanol. It was found that the pd(2+) ion and quercetin form a 1:1 complex in which Pd2+ is linked to quercetin through the carbonyl and the 3-hydroxyl group. The stability constant log beta(1) ranged from 6.05 at pH = 5.00 to 4.96 at pH = 6.50. The conditions for the spectrophotometric determination of quercetin by means of complex formation were investigated. Beer's law was obeyed up to 5.00 x 10(-5) M quercetin.
PB  - Springer-Verlag Wien, Vienna
T2  - Monatshefte für Chemie Chemical Monthly
T1  - Spectrophotometric investigation of the Pd(II)-quercetin complex in 50% ethanol
VL  - 129
IS  - 1
SP  - 41
EP  - 48
DO  - 10.1007/PL00010103
ER  - 

@article{
author = "Kuntić, Vesna and Blagojević, S. and Malešev, Dušan and Radović, Z and Bogavac, M",
year = "1998",
abstract = "Composition and stability constant of the Pd(II)-quercetin complex were determined by suitable spectrophotometric methods and pH-metric measurements in 50% Ethanol. It was found that the pd(2+) ion and quercetin form a 1:1 complex in which Pd2+ is linked to quercetin through the carbonyl and the 3-hydroxyl group. The stability constant log beta(1) ranged from 6.05 at pH = 5.00 to 4.96 at pH = 6.50. The conditions for the spectrophotometric determination of quercetin by means of complex formation were investigated. Beer's law was obeyed up to 5.00 x 10(-5) M quercetin.",
publisher = "Springer-Verlag Wien, Vienna",
journal = "Monatshefte für Chemie Chemical Monthly",
title = "Spectrophotometric investigation of the Pd(II)-quercetin complex in 50% ethanol",
volume = "129",
number = "1",
pages = "41-48",
doi = "10.1007/PL00010103"
}

Kuntić, V., Blagojević, S., Malešev, D., Radović, Z.,& Bogavac, M.. (1998). Spectrophotometric investigation of the Pd(II)-quercetin complex in 50% ethanol. in Monatshefte für Chemie Chemical Monthly
Springer-Verlag Wien, Vienna., 129(1), 41-48.
https://doi.org/10.1007/PL00010103

Kuntić V, Blagojević S, Malešev D, Radović Z, Bogavac M. Spectrophotometric investigation of the Pd(II)-quercetin complex in 50% ethanol. in Monatshefte für Chemie Chemical Monthly. 1998;129(1):41-48.
doi:10.1007/PL00010103 .

Kuntić, Vesna, Blagojević, S., Malešev, Dušan, Radović, Z, Bogavac, M, "Spectrophotometric investigation of the Pd(II)-quercetin complex in 50% ethanol" in Monatshefte für Chemie Chemical Monthly, 129, no. 1 (1998):41-48,
https://doi.org/10.1007/PL00010103 . .

TY  - JOUR
AU  - Kuntić, Vesna
AU  - Kosanić, M
AU  - Malešev, Dušan
AU  - Radović, Z
AU  - Mioč, Ubavka B.
PY  - 1998
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/176
AB  - The composition and stability constant of the UO2(II)-hesperidin complex were determined by suitable spectrophotometric methods and pH-metric measurements. II was found that the uranil ion and hesperidin form a 1:2 complex in which the uranil ion is linked to the hesperidin molecule through the carbonyl and the 5-hydroxyl group. The relative stability constant, log K-2, ranged from 5.77 at pH 4.0 to 7.00 at pH 6.0. The conditions for the spectrophotometric determination of hesperidin, by means of reaction of the complex formation reaction, were investigated. Beer's law was obeyed up to 2.0x10(-5) mol dm(-3) hesperidin.
PB  - Srpsko hemijsko društvo, Beograd
T2  - Journal of the Serbian Chemical Society
T1  - Spectrophotometric investigation of the uranil(II)-hesperidin complex in 70% methanol
VL  - 63
IS  - 7
SP  - 565
EP  - 572
UR  - https://hdl.handle.net/21.15107/rcub_farfar_176
ER  - 

@article{
author = "Kuntić, Vesna and Kosanić, M and Malešev, Dušan and Radović, Z and Mioč, Ubavka B.",
year = "1998",
abstract = "The composition and stability constant of the UO2(II)-hesperidin complex were determined by suitable spectrophotometric methods and pH-metric measurements. II was found that the uranil ion and hesperidin form a 1:2 complex in which the uranil ion is linked to the hesperidin molecule through the carbonyl and the 5-hydroxyl group. The relative stability constant, log K-2, ranged from 5.77 at pH 4.0 to 7.00 at pH 6.0. The conditions for the spectrophotometric determination of hesperidin, by means of reaction of the complex formation reaction, were investigated. Beer's law was obeyed up to 2.0x10(-5) mol dm(-3) hesperidin.",
publisher = "Srpsko hemijsko društvo, Beograd",
journal = "Journal of the Serbian Chemical Society",
title = "Spectrophotometric investigation of the uranil(II)-hesperidin complex in 70% methanol",
volume = "63",
number = "7",
pages = "565-572",
url = "https://hdl.handle.net/21.15107/rcub_farfar_176"
}

Kuntić, V., Kosanić, M., Malešev, D., Radović, Z.,& Mioč, U. B.. (1998). Spectrophotometric investigation of the uranil(II)-hesperidin complex in 70% methanol. in Journal of the Serbian Chemical Society
Srpsko hemijsko društvo, Beograd., 63(7), 565-572.
https://hdl.handle.net/21.15107/rcub_farfar_176

Kuntić V, Kosanić M, Malešev D, Radović Z, Mioč UB. Spectrophotometric investigation of the uranil(II)-hesperidin complex in 70% methanol. in Journal of the Serbian Chemical Society. 1998;63(7):565-572.
https://hdl.handle.net/21.15107/rcub_farfar_176 .

Kuntić, Vesna, Kosanić, M, Malešev, Dušan, Radović, Z, Mioč, Ubavka B., "Spectrophotometric investigation of the uranil(II)-hesperidin complex in 70% methanol" in Journal of the Serbian Chemical Society, 63, no. 7 (1998):565-572,
https://hdl.handle.net/21.15107/rcub_farfar_176 .

TY  - JOUR
AU  - Kuntić, Vesna
AU  - Kosanić, M
AU  - Malešev, Dušan
AU  - Radović, Z
PY  - 1998
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/195
PB  - Govi-Verlag Gmbh, Eschborn
T2  - Pharmazie
T1  - Spectrophotometric investigation of Pd(II)-rutin complexes and its application to rutin determination in tablets
VL  - 53
IS  - 10
SP  - 724
EP  - 726
UR  - https://hdl.handle.net/21.15107/rcub_farfar_195
ER  - 

@article{
author = "Kuntić, Vesna and Kosanić, M and Malešev, Dušan and Radović, Z",
year = "1998",
publisher = "Govi-Verlag Gmbh, Eschborn",
journal = "Pharmazie",
title = "Spectrophotometric investigation of Pd(II)-rutin complexes and its application to rutin determination in tablets",
volume = "53",
number = "10",
pages = "724-726",
url = "https://hdl.handle.net/21.15107/rcub_farfar_195"
}

Kuntić, V., Kosanić, M., Malešev, D.,& Radović, Z.. (1998). Spectrophotometric investigation of Pd(II)-rutin complexes and its application to rutin determination in tablets. in Pharmazie
Govi-Verlag Gmbh, Eschborn., 53(10), 724-726.
https://hdl.handle.net/21.15107/rcub_farfar_195

Kuntić V, Kosanić M, Malešev D, Radović Z. Spectrophotometric investigation of Pd(II)-rutin complexes and its application to rutin determination in tablets. in Pharmazie. 1998;53(10):724-726.
https://hdl.handle.net/21.15107/rcub_farfar_195 .

Kuntić, Vesna, Kosanić, M, Malešev, Dušan, Radović, Z, "Spectrophotometric investigation of Pd(II)-rutin complexes and its application to rutin determination in tablets" in Pharmazie, 53, no. 10 (1998):724-726,
https://hdl.handle.net/21.15107/rcub_farfar_195 .

TY  - JOUR
AU  - Malešev, Dušan
AU  - Radović, Z
AU  - Kuntić, Vesna
AU  - Kosanić, M
PY  - 1997
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/172
AB  - The composition and the stability constant of the Al(III)-hesperidin complex were determined by suitable spectrophotometric methods and pH measurements. The formation of the complex, whose concentration stability constant log K-1 ranged from 3.46 at pH=4.0 to 4.54 at pH=5.0, was established. The conditions for the spectrophotometric determination of hesperidin, by means of the complex formation, were investigated. It was found that hesperidin can be determined in the range from 2.50x10(-5)M to 1.75x10(-4)M. The application to the determination of hesperidin in orange juice is demonstrated. All investigations were carried out with 70% methanolic solutions at room temperature (20 degrees C), constant values of pH (3.7), and ionic strength (0.01).
PB  - Marcel Dekker Inc, New York
T2  - Analytical Letters
T1  - Spectrophotometric determination of hesperidin by Al(III)-hesperidin complex in water-methanol solution
VL  - 30
IS  - 5
SP  - 917
EP  - 926
DO  - 10.1080/00032719708002306
UR  - https://hdl.handle.net/21.15107/rcub_farfar_172
ER  - 

@article{
author = "Malešev, Dušan and Radović, Z and Kuntić, Vesna and Kosanić, M",
year = "1997",
abstract = "The composition and the stability constant of the Al(III)-hesperidin complex were determined by suitable spectrophotometric methods and pH measurements. The formation of the complex, whose concentration stability constant log K-1 ranged from 3.46 at pH=4.0 to 4.54 at pH=5.0, was established. The conditions for the spectrophotometric determination of hesperidin, by means of the complex formation, were investigated. It was found that hesperidin can be determined in the range from 2.50x10(-5)M to 1.75x10(-4)M. The application to the determination of hesperidin in orange juice is demonstrated. All investigations were carried out with 70% methanolic solutions at room temperature (20 degrees C), constant values of pH (3.7), and ionic strength (0.01).",
publisher = "Marcel Dekker Inc, New York",
journal = "Analytical Letters",
title = "Spectrophotometric determination of hesperidin by Al(III)-hesperidin complex in water-methanol solution",
volume = "30",
number = "5",
pages = "917-926",
doi = "10.1080/00032719708002306",
url = "https://hdl.handle.net/21.15107/rcub_farfar_172"
}

Malešev, D., Radović, Z., Kuntić, V.,& Kosanić, M.. (1997). Spectrophotometric determination of hesperidin by Al(III)-hesperidin complex in water-methanol solution. in Analytical Letters
Marcel Dekker Inc, New York., 30(5), 917-926.
https://doi.org/10.1080/00032719708002306
https://hdl.handle.net/21.15107/rcub_farfar_172

Malešev D, Radović Z, Kuntić V, Kosanić M. Spectrophotometric determination of hesperidin by Al(III)-hesperidin complex in water-methanol solution. in Analytical Letters. 1997;30(5):917-926.
doi:10.1080/00032719708002306
https://hdl.handle.net/21.15107/rcub_farfar_172 .

Malešev, Dušan, Radović, Z, Kuntić, Vesna, Kosanić, M, "Spectrophotometric determination of hesperidin by Al(III)-hesperidin complex in water-methanol solution" in Analytical Letters, 30, no. 5 (1997):917-926,
https://doi.org/10.1080/00032719708002306 .,
https://hdl.handle.net/21.15107/rcub_farfar_172 .