Spectrophotometric investigation of the uranyl-phenylephrine system
Spektrofotometrijsko ispitivanje uranil-fenilefrin sistema
Апстракт
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%. .
Кључне речи:
complex / uranyl ion / phenylephrine / thermodynamic stability constantИзвор:
Journal of the Serbian Chemical Society, 2007, 72, 8-9, 799-807Издавач:
- Srpsko hemijsko društvo, Beograd
DOI: 10.2298/JSC0709799P
ISSN: 0352-5139
WoS: 000249768600007
Scopus: 2-s2.0-34548381393
Институција/група
PharmacyTY - 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 . .