TY  - JOUR
AU  - Kapetanović, Vera
AU  - Milovanović, Ljiljana
AU  - Aleksić, Mara
AU  - Ignjatović, Ljiljana
PY  - 2000
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/5470
AB  - Abstract
The direct current (dc) and differential pulse (dp) polarographic reduction of fleroxacin was done in a wide pH range from 2.48 to 13.00. The appropriate buffer choice was made for its dp polarographic determination in a range from 1.845 to 16.926 microg /ml, at pH 8.50. The adsorptive properties of fleroxacin were investigated in order to achieve an increase in sensitivity and a possibility of fleroxacin determination by applying the adsorptive stripping voltammetric method. The adsorptive processes at the hanging mercury drop electrode were investigated in Britton-Robinson and borate buffers. Adsorptive preconcentration followed by differential-pulse cathodic stripping showed one wave at approximately - 1.1 V being the most sensitive for analytical determination of fleroxacin. Two linear ranges were obtained, the first one from 18.465 to 258.51 ng/ml, and the second one from 3.693 to 18.465 ng/ml.
PB  - Elsevier
T2  - Analysis
T1  - Voltammetric methods for analytical determination of fleroxacin in quinodis tablets
VL  - 22
IS  - 6
SP  - 925
EP  - 932
DO  - 10.1016/s0731-7085(00)00289-2
ER  - 

@article{
author = "Kapetanović, Vera and Milovanović, Ljiljana and Aleksić, Mara and Ignjatović, Ljiljana",
year = "2000",
abstract = "Abstract
The direct current (dc) and differential pulse (dp) polarographic reduction of fleroxacin was done in a wide pH range from 2.48 to 13.00. The appropriate buffer choice was made for its dp polarographic determination in a range from 1.845 to 16.926 microg /ml, at pH 8.50. The adsorptive properties of fleroxacin were investigated in order to achieve an increase in sensitivity and a possibility of fleroxacin determination by applying the adsorptive stripping voltammetric method. The adsorptive processes at the hanging mercury drop electrode were investigated in Britton-Robinson and borate buffers. Adsorptive preconcentration followed by differential-pulse cathodic stripping showed one wave at approximately - 1.1 V being the most sensitive for analytical determination of fleroxacin. Two linear ranges were obtained, the first one from 18.465 to 258.51 ng/ml, and the second one from 3.693 to 18.465 ng/ml.",
publisher = "Elsevier",
journal = "Analysis",
title = "Voltammetric methods for analytical determination of fleroxacin in quinodis tablets",
volume = "22",
number = "6",
pages = "925-932",
doi = "10.1016/s0731-7085(00)00289-2"
}

Kapetanović, V., Milovanović, L., Aleksić, M.,& Ignjatović, L.. (2000). Voltammetric methods for analytical determination of fleroxacin in quinodis tablets. in Analysis
Elsevier., 22(6), 925-932.
https://doi.org/10.1016/s0731-7085(00)00289-2

Kapetanović V, Milovanović L, Aleksić M, Ignjatović L. Voltammetric methods for analytical determination of fleroxacin in quinodis tablets. in Analysis. 2000;22(6):925-932.
doi:10.1016/s0731-7085(00)00289-2 .

Kapetanović, Vera, Milovanović, Ljiljana, Aleksić, Mara, Ignjatović, Ljiljana, "Voltammetric methods for analytical determination of fleroxacin in quinodis tablets" in Analysis, 22, no. 6 (2000):925-932,
https://doi.org/10.1016/s0731-7085(00)00289-2 . .

TY  - JOUR
AU  - Kapetanović, Vera
AU  - Aleksić, Mara
AU  - Erceg, M.
AU  - Veselinović, D.
PY  - 2000
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/5465
AB  - Abstract
Polarographic behavior of cephalosporin cefetamet–Na (Cef–Na) in aqueous solutions of pH ranging from 1.7 to 12.5 was
investigated by applying direct current (dc) polarography, differential pulse polarography (dpp), alternating current (ac)
polarography, cyclic voltammetry and electrolysis at constant potential. The characteristics of the corresponding electrode reaction
are presented and discussed. The electrode reaction was found to be affected by strong adsorption, strongly and slightly
pronounced in acidic and alkaline media, respectively. The methoxyimino group electroreduction was carried out and the
mechanistic scheme was suggested. In addition, a sensitive dpp method was proposed for analytical determination of a very low
concentrations of Cef–Na.
PB  - Elsevier S.A.
T2  - Il Farmaco
T1  - Electrochemical study of cefetamet-Na and its polarographic determination
VL  - 55
IS  - 1
SP  - 13
EP  - 20
DO  - 10.1016/S0014-827X99)00105-6
ER  - 

@article{
author = "Kapetanović, Vera and Aleksić, Mara and Erceg, M. and Veselinović, D.",
year = "2000",
abstract = "Abstract
Polarographic behavior of cephalosporin cefetamet–Na (Cef–Na) in aqueous solutions of pH ranging from 1.7 to 12.5 was
investigated by applying direct current (dc) polarography, differential pulse polarography (dpp), alternating current (ac)
polarography, cyclic voltammetry and electrolysis at constant potential. The characteristics of the corresponding electrode reaction
are presented and discussed. The electrode reaction was found to be affected by strong adsorption, strongly and slightly
pronounced in acidic and alkaline media, respectively. The methoxyimino group electroreduction was carried out and the
mechanistic scheme was suggested. In addition, a sensitive dpp method was proposed for analytical determination of a very low
concentrations of Cef–Na.",
publisher = "Elsevier S.A.",
journal = "Il Farmaco",
title = "Electrochemical study of cefetamet-Na and its polarographic determination",
volume = "55",
number = "1",
pages = "13-20",
doi = "10.1016/S0014-827X99)00105-6"
}

Kapetanović, V., Aleksić, M., Erceg, M.,& Veselinović, D.. (2000). Electrochemical study of cefetamet-Na and its polarographic determination. in Il Farmaco
Elsevier S.A.., 55(1), 13-20.
https://doi.org/10.1016/S0014-827X99)00105-6

Kapetanović V, Aleksić M, Erceg M, Veselinović D. Electrochemical study of cefetamet-Na and its polarographic determination. in Il Farmaco. 2000;55(1):13-20.
doi:10.1016/S0014-827X99)00105-6 .

Kapetanović, Vera, Aleksić, Mara, Erceg, M., Veselinović, D., "Electrochemical study of cefetamet-Na and its polarographic determination" in Il Farmaco, 55, no. 1 (2000):13-20,
https://doi.org/10.1016/S0014-827X99)00105-6 . .

TY  - JOUR
AU  - Kosanić, Mara
AU  - Kapetanović, Vera
AU  - Milovanović, Ljiljana
AU  - Burić, N.
AU  - Veselinović, D.
PY  - 1997
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/5469
AB  - Summary. The dissociation constants of cefetamet-Na have been determined using potentiometric
titrations and spectrophotometry. The investigations were carried on in water solutions at constant
temperature and ionic strength, and at different H0 and pH values. Potentiometric investigations were
performed at three different temperatures and ionic strengths. The concentration dissociation constants
and the corresponding thermodynamic dissociation constants were calculated by a computer
program. The mixed dissociation constants (pK') of cefetamet-Na have been determined spectrophotometrically
in the H0 range from -5.80 to 0.00 and at pH values from 0.00 to 12.70 and are
in good agreement with values achieved by graphical methods as well as with those obtained
by potentiometric methods. Based on the determined values, the thermodynamic parameters
(AG, AH, AS) were calculated at I = 0.1 M.
PB  - Springer Wien
T2  - Monatshefte für Chemie
T1  - Potentiometric and Spectrophotometric Determination of Dissociation Constants of Cefetamet
VL  - 128
VL  - 146
IS  - 2
SP  - 137
DO  - 10.1007/BF00807302
ER  - 

@article{
author = "Kosanić, Mara and Kapetanović, Vera and Milovanović, Ljiljana and Burić, N. and Veselinović, D.",
year = "1997",
abstract = "Summary. The dissociation constants of cefetamet-Na have been determined using potentiometric
titrations and spectrophotometry. The investigations were carried on in water solutions at constant
temperature and ionic strength, and at different H0 and pH values. Potentiometric investigations were
performed at three different temperatures and ionic strengths. The concentration dissociation constants
and the corresponding thermodynamic dissociation constants were calculated by a computer
program. The mixed dissociation constants (pK') of cefetamet-Na have been determined spectrophotometrically
in the H0 range from -5.80 to 0.00 and at pH values from 0.00 to 12.70 and are
in good agreement with values achieved by graphical methods as well as with those obtained
by potentiometric methods. Based on the determined values, the thermodynamic parameters
(AG, AH, AS) were calculated at I = 0.1 M.",
publisher = "Springer Wien",
journal = "Monatshefte für Chemie",
title = "Potentiometric and Spectrophotometric Determination of Dissociation Constants of Cefetamet",
volume = "128, 146",
number = "2",
pages = "137",
doi = "10.1007/BF00807302"
}

Kosanić, M., Kapetanović, V., Milovanović, L., Burić, N.,& Veselinović, D.. (1997). Potentiometric and Spectrophotometric Determination of Dissociation Constants of Cefetamet. in Monatshefte für Chemie
Springer Wien., 128(2), 137.
https://doi.org/10.1007/BF00807302

Kosanić M, Kapetanović V, Milovanović L, Burić N, Veselinović D. Potentiometric and Spectrophotometric Determination of Dissociation Constants of Cefetamet. in Monatshefte für Chemie. 1997;128(2):137.
doi:10.1007/BF00807302 .

Kosanić, Mara, Kapetanović, Vera, Milovanović, Ljiljana, Burić, N., Veselinović, D., "Potentiometric and Spectrophotometric Determination of Dissociation Constants of Cefetamet" in Monatshefte für Chemie, 128, no. 2 (1997):137,
https://doi.org/10.1007/BF00807302 . .