TY  - JOUR
AU  - Pavun, Leposava
AU  - Malešev, Dušan
AU  - Veselinović, Dragan S.
PY  - 2007
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/1001
AB  - Using spectrophotometric methods and pH-metric measurements, it was found that the uranyl ion and phenylephrine form a 1:2 complex in the pH region 2.50-4.25 with two absorption maxima at 314.2 nm and 340.6 nm. The thermodynamic stability constant at I = 0 and T=298 K (room temperature) of the UO2(II)-phenylephrine complex, UO2(C9H12O2N)2, is log 0 β 2= 14.0 and ΔG2= -79.6 kJ mol-1. A linear dependence of the absorbance at 340.6 nm on the concentration of phenylephrine was obtained in the range from 0.0025 mol dm-3 to 0.0245 mol dm-3 using a solution of 0.025 mol dm-3 UO2(NO3)2 at pH = 3.90 and I = 0.075 mol dm-3. The measurement error was 2.1%. .
AB  - Primenom spektrofotometrijskih metoda i pH-metrijskih merenja utvrđeno je da UO2(II)-jon i fenilefrin grade 1:2 kompleks u oblasti rN 2,50 - 4,25 sa dva apsorpciona maksimuma na 314,2 nm i 340,6 nm. Termodinamička konstanta stabilnosti kompleksa UO2(II)-fenilefrin, UO2(C9H12O2N)2, na I = 0 i na sobnoj temperaturi (25°C) iznosi log 0 β 2 = 14,0, a ΔG2= = -79,6 kJ mol-1. Linearna zavisnost apsorbancije od koncentracije fenilefrina u vodenom rastvoru UO2(NO3)2 koncentracije 0,025 mol dm-3 na 340,6 nm dobijena je u intervalu 0,0025-0,0245 mol dm-3 na pH 3,90 i I = 0,075 mol dm-3. Greška merenja iznosi 2.1%. .
PB  - Srpsko hemijsko društvo, Beograd
T2  - Journal of the Serbian Chemical Society
T1  - Spectrophotometric investigation of the uranyl-phenylephrine system
T1  - Spektrofotometrijsko ispitivanje uranil-fenilefrin sistema
VL  - 72
IS  - 8-9
SP  - 799
EP  - 807
DO  - 10.2298/JSC0709799P
ER  - 

@article{
author = "Pavun, Leposava and Malešev, Dušan and Veselinović, Dragan S.",
year = "2007",
abstract = "Using spectrophotometric methods and pH-metric measurements, it was found that the uranyl ion and phenylephrine form a 1:2 complex in the pH region 2.50-4.25 with two absorption maxima at 314.2 nm and 340.6 nm. The thermodynamic stability constant at I = 0 and T=298 K (room temperature) of the UO2(II)-phenylephrine complex, UO2(C9H12O2N)2, is log 0 β 2= 14.0 and ΔG2= -79.6 kJ mol-1. A linear dependence of the absorbance at 340.6 nm on the concentration of phenylephrine was obtained in the range from 0.0025 mol dm-3 to 0.0245 mol dm-3 using a solution of 0.025 mol dm-3 UO2(NO3)2 at pH = 3.90 and I = 0.075 mol dm-3. The measurement error was 2.1%. ., Primenom spektrofotometrijskih metoda i pH-metrijskih merenja utvrđeno je da UO2(II)-jon i fenilefrin grade 1:2 kompleks u oblasti rN 2,50 - 4,25 sa dva apsorpciona maksimuma na 314,2 nm i 340,6 nm. Termodinamička konstanta stabilnosti kompleksa UO2(II)-fenilefrin, UO2(C9H12O2N)2, na I = 0 i na sobnoj temperaturi (25°C) iznosi log 0 β 2 = 14,0, a ΔG2= = -79,6 kJ mol-1. Linearna zavisnost apsorbancije od koncentracije fenilefrina u vodenom rastvoru UO2(NO3)2 koncentracije 0,025 mol dm-3 na 340,6 nm dobijena je u intervalu 0,0025-0,0245 mol dm-3 na pH 3,90 i I = 0,075 mol dm-3. Greška merenja iznosi 2.1%. .",
publisher = "Srpsko hemijsko društvo, Beograd",
journal = "Journal of the Serbian Chemical Society",
title = "Spectrophotometric investigation of the uranyl-phenylephrine system, Spektrofotometrijsko ispitivanje uranil-fenilefrin sistema",
volume = "72",
number = "8-9",
pages = "799-807",
doi = "10.2298/JSC0709799P"
}

Pavun, L., Malešev, D.,& Veselinović, D. S.. (2007). Spectrophotometric investigation of the uranyl-phenylephrine system. in Journal of the Serbian Chemical Society
Srpsko hemijsko društvo, Beograd., 72(8-9), 799-807.
https://doi.org/10.2298/JSC0709799P

Pavun L, Malešev D, Veselinović DS. Spectrophotometric investigation of the uranyl-phenylephrine system. in Journal of the Serbian Chemical Society. 2007;72(8-9):799-807.
doi:10.2298/JSC0709799P .

Pavun, Leposava, Malešev, Dušan, Veselinović, Dragan S., "Spectrophotometric investigation of the uranyl-phenylephrine system" in Journal of the Serbian Chemical Society, 72, no. 8-9 (2007):799-807,
https://doi.org/10.2298/JSC0709799P . .

TY  - JOUR
AU  - Pavun, Leposava
AU  - Malešev, Dušan
AU  - Veselinović, Dragan S.
PY  - 2003
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/449
AB  - The concentration stability constants of Fe(III)-orciprenaline complex and Fe(III)-phenylephrine complex were calculated for three different ionic strengths, by modificated Bjerrum's method. The values of thermodynamic stability constants are determined from curve log β = f (I1/2), as interception at ordinate. From the determined thermodynamic stability constants logβ10 =8,28 and logβ02 = 16,24 of the complexes investigated, the values of the ∆G10= - 46,87 kJ/mol and, AG° = -92,76 kJ/mol were calculated for Fe(III)-orciprenaline and Fe(III)- phenylephrine complexes respectively.
AB  - Za komplekse Fe(III)-fenilefrin i Fe(III)-orciprenalin određene su vrednosti koncentracionih konstanti stabilnosti na tri jonske jačine (0,024; 0,050 0,075 mol/dm3). Na osnovu ovih vrednosti izračunate su termodinamičke konstante stabilnosti ovih kompleksa ekstrapolacijom dijagrama logβn=f(I) na vrednost I=0. Dobijena vrednost za kompleks Fe(III)-fenilefrin je logβ0 2 = 16,24, a za kompleks Fe(III)-orciprenalin ona iznosi logβ10= 8,28. Izračunate su promene standardne Gibbsove energije za reakciju stvaranja kompleksa: ∆G1°= -46,87 kJ/mol za Fe(III)- orciprenalin i ∆G°2 = -92,76 kJ/mol za Fe(III)-fenilefrin.
PB  - Savez farmaceutskih udruženja Srbije, Beograd
T2  - Arhiv za farmaciju
T1  - Thermodynamic stability constants of complexes of Fe(III)-ion with orciprenaline and phenylephrine
T1  - Termodinamičke konstante stabilnosti kompleksa Fe(III)-jona sa orciprenalinom i fenilefrinom
VL  - 53
IS  - 1-2
SP  - 27
EP  - 36
UR  - https://hdl.handle.net/21.15107/rcub_farfar_449
ER  - 

@article{
author = "Pavun, Leposava and Malešev, Dušan and Veselinović, Dragan S.",
year = "2003",
abstract = "The concentration stability constants of Fe(III)-orciprenaline complex and Fe(III)-phenylephrine complex were calculated for three different ionic strengths, by modificated Bjerrum's method. The values of thermodynamic stability constants are determined from curve log β = f (I1/2), as interception at ordinate. From the determined thermodynamic stability constants logβ10 =8,28 and logβ02 = 16,24 of the complexes investigated, the values of the ∆G10= - 46,87 kJ/mol and, AG° = -92,76 kJ/mol were calculated for Fe(III)-orciprenaline and Fe(III)- phenylephrine complexes respectively., Za komplekse Fe(III)-fenilefrin i Fe(III)-orciprenalin određene su vrednosti koncentracionih konstanti stabilnosti na tri jonske jačine (0,024; 0,050 0,075 mol/dm3). Na osnovu ovih vrednosti izračunate su termodinamičke konstante stabilnosti ovih kompleksa ekstrapolacijom dijagrama logβn=f(I) na vrednost I=0. Dobijena vrednost za kompleks Fe(III)-fenilefrin je logβ0 2 = 16,24, a za kompleks Fe(III)-orciprenalin ona iznosi logβ10= 8,28. Izračunate su promene standardne Gibbsove energije za reakciju stvaranja kompleksa: ∆G1°= -46,87 kJ/mol za Fe(III)- orciprenalin i ∆G°2 = -92,76 kJ/mol za Fe(III)-fenilefrin.",
publisher = "Savez farmaceutskih udruženja Srbije, Beograd",
journal = "Arhiv za farmaciju",
title = "Thermodynamic stability constants of complexes of Fe(III)-ion with orciprenaline and phenylephrine, Termodinamičke konstante stabilnosti kompleksa Fe(III)-jona sa orciprenalinom i fenilefrinom",
volume = "53",
number = "1-2",
pages = "27-36",
url = "https://hdl.handle.net/21.15107/rcub_farfar_449"
}

Pavun, L., Malešev, D.,& Veselinović, D. S.. (2003). Thermodynamic stability constants of complexes of Fe(III)-ion with orciprenaline and phenylephrine. in Arhiv za farmaciju
Savez farmaceutskih udruženja Srbije, Beograd., 53(1-2), 27-36.
https://hdl.handle.net/21.15107/rcub_farfar_449

Pavun L, Malešev D, Veselinović DS. Thermodynamic stability constants of complexes of Fe(III)-ion with orciprenaline and phenylephrine. in Arhiv za farmaciju. 2003;53(1-2):27-36.
https://hdl.handle.net/21.15107/rcub_farfar_449 .

Pavun, Leposava, Malešev, Dušan, Veselinović, Dragan S., "Thermodynamic stability constants of complexes of Fe(III)-ion with orciprenaline and phenylephrine" in Arhiv za farmaciju, 53, no. 1-2 (2003):27-36,
https://hdl.handle.net/21.15107/rcub_farfar_449 .