TY  - JOUR
AU  - Korićanac, Zagorka
AU  - Čakar, Mira
AU  - Tanasković, Slađana
AU  - Jovanović, Tatijana
PY  - 2007
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/1003
AB  - A spectrophotometric method is described for the assay of thioctic acid. The method is based on the reaction between the drug and palladium(II) chloride. In this reaction, a yellow-colored, water soluble product with a 1:1 stoichiometric ratio and an absorption maximum at 365 nm was formed. The stability of the formed complex depends on various factors (pH, reaction time, concentration of reagents, ionic strength). Based on these findings, a new method is suggested for the spectrophotometric determination of thioctic acid in pharmaceutical formulations. This method is simple, sensitive and reproducible.
AB  - Opisana je jednostavna spektrofotometrijska metoda za brzo i tačno određivanje tioktinske kiseline u vodi, injekcionim rastvorima i tabletama. Spektrofotometrijska merenja su izvođena u Britton-Robinson-ovim puferima pri različitim pH vrednostima (2,00-6,00) i konstantnoj jonskoj sili. Sastav, konstanta stabilnosti, molarna apsorptivnost kompleksa su određene različitim metodama. Utvrđen je 1:1 sastav nagrađenog kompleksa i molarna apsorptivnost 4.2x103 l mol-1 cm-1. Relativna standardna devijacija iznosi od 3,10 do 3,76%,{to odgovara propisanim analitičkim standardima.
PB  - Srpsko hemijsko društvo, Beograd
T2  - Journal of the Serbian Chemical Society
T1  - Spectrophotometric determination of thioctic (α-lipoic) acid in water and pharmaceutical preparations
T1  - Spektrofotometrijsko određivanje tioktinske kiseline u vodi i farmaceutskim preparatima
VL  - 72
IS  - 1
SP  - 29
EP  - 35
DO  - 10.2298/JSC0701029K
ER  - 

@article{
author = "Korićanac, Zagorka and Čakar, Mira and Tanasković, Slađana and Jovanović, Tatijana",
year = "2007",
abstract = "A spectrophotometric method is described for the assay of thioctic acid. The method is based on the reaction between the drug and palladium(II) chloride. In this reaction, a yellow-colored, water soluble product with a 1:1 stoichiometric ratio and an absorption maximum at 365 nm was formed. The stability of the formed complex depends on various factors (pH, reaction time, concentration of reagents, ionic strength). Based on these findings, a new method is suggested for the spectrophotometric determination of thioctic acid in pharmaceutical formulations. This method is simple, sensitive and reproducible., Opisana je jednostavna spektrofotometrijska metoda za brzo i tačno određivanje tioktinske kiseline u vodi, injekcionim rastvorima i tabletama. Spektrofotometrijska merenja su izvođena u Britton-Robinson-ovim puferima pri različitim pH vrednostima (2,00-6,00) i konstantnoj jonskoj sili. Sastav, konstanta stabilnosti, molarna apsorptivnost kompleksa su određene različitim metodama. Utvrđen je 1:1 sastav nagrađenog kompleksa i molarna apsorptivnost 4.2x103 l mol-1 cm-1. Relativna standardna devijacija iznosi od 3,10 do 3,76%,{to odgovara propisanim analitičkim standardima.",
publisher = "Srpsko hemijsko društvo, Beograd",
journal = "Journal of the Serbian Chemical Society",
title = "Spectrophotometric determination of thioctic (α-lipoic) acid in water and pharmaceutical preparations, Spektrofotometrijsko određivanje tioktinske kiseline u vodi i farmaceutskim preparatima",
volume = "72",
number = "1",
pages = "29-35",
doi = "10.2298/JSC0701029K"
}

Korićanac, Z., Čakar, M., Tanasković, S.,& Jovanović, T.. (2007). Spectrophotometric determination of thioctic (α-lipoic) acid in water and pharmaceutical preparations. in Journal of the Serbian Chemical Society
Srpsko hemijsko društvo, Beograd., 72(1), 29-35.
https://doi.org/10.2298/JSC0701029K

Korićanac Z, Čakar M, Tanasković S, Jovanović T. Spectrophotometric determination of thioctic (α-lipoic) acid in water and pharmaceutical preparations. in Journal of the Serbian Chemical Society. 2007;72(1):29-35.
doi:10.2298/JSC0701029K .

Korićanac, Zagorka, Čakar, Mira, Tanasković, Slađana, Jovanović, Tatijana, "Spectrophotometric determination of thioctic (α-lipoic) acid in water and pharmaceutical preparations" in Journal of the Serbian Chemical Society, 72, no. 1 (2007):29-35,
https://doi.org/10.2298/JSC0701029K . .

TY  - CONF
AU  - Korićanac, Zagorka
AU  - Jovanović, T.
AU  - Tanasković, Slađana
PY  - 2006
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/758
PB  - Savez farmaceutskih udruženja Srbije, Beograd
C3  - Arhiv za farmaciju
T1  - Derivate UV spectrophotometric determination of some phenothiazine oximes
T1  - Određivanje nekih fenotiazinskih oksima derivativnom UV spektrofotometrijom
VL  - 56
IS  - 5
SP  - 752
EP  - 753
UR  - https://hdl.handle.net/21.15107/rcub_farfar_758
ER  - 

@conference{
author = "Korićanac, Zagorka and Jovanović, T. and Tanasković, Slađana",
year = "2006",
publisher = "Savez farmaceutskih udruženja Srbije, Beograd",
journal = "Arhiv za farmaciju",
title = "Derivate UV spectrophotometric determination of some phenothiazine oximes, Određivanje nekih fenotiazinskih oksima derivativnom UV spektrofotometrijom",
volume = "56",
number = "5",
pages = "752-753",
url = "https://hdl.handle.net/21.15107/rcub_farfar_758"
}

Korićanac, Z., Jovanović, T.,& Tanasković, S.. (2006). Derivate UV spectrophotometric determination of some phenothiazine oximes. in Arhiv za farmaciju
Savez farmaceutskih udruženja Srbije, Beograd., 56(5), 752-753.
https://hdl.handle.net/21.15107/rcub_farfar_758

Korićanac Z, Jovanović T, Tanasković S. Derivate UV spectrophotometric determination of some phenothiazine oximes. in Arhiv za farmaciju. 2006;56(5):752-753.
https://hdl.handle.net/21.15107/rcub_farfar_758 .

Korićanac, Zagorka, Jovanović, T., Tanasković, Slađana, "Derivate UV spectrophotometric determination of some phenothiazine oximes" in Arhiv za farmaciju, 56, no. 5 (2006):752-753,
https://hdl.handle.net/21.15107/rcub_farfar_758 .

TY  - JOUR
AU  - Karljiković-Rajić, Katarina
AU  - Jovanović, M
AU  - Korićanac, Zagorka
AU  - Stanković, B
AU  - Minić, D
PY  - 1991
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/82
AB  - The electrochemical behavior of 1‐(2‐phenyl‐2‐hydroxyiminoethyl)‐1‐quinolinium chloride (F‐1) and 1‐(2‐phenyl‐2‐hydroxyiminoethyl)‐1‐isoquinolinium chloride (F‐2) was investigated using dc and differential pulse polarography (DPP) and cyclic voltammetry. Well‐defined, diffusion‐controlled, cathodic waves were observed for F‐1 only in strong acidic solution (pH 1.25 HCl) and for F‐2 in the H range 1.25–5.33 (HCl and Britton–Robinson buffer). The overall reduction of the azomethine group to a primary amine, a process that involves the uptake of four electrons, is irreversible. For both oximes a mechanism of reduction has been proposed. The rapid and accurate determination of these quinolinium and isoquinolinium oximes is possible by dc polarography and by DPP. Limits of detection are 5 × 10−7 M for both oximes using DPP.
T2  - Electroanalysis
T1  - Electrochemical behavior and determination of quinolinium and isoquinolinium oximes
VL  - 3
IS  - 2
SP  - 139
EP  - 144
DO  - 10.1002/elan.1140030211
ER  - 

@article{
author = "Karljiković-Rajić, Katarina and Jovanović, M and Korićanac, Zagorka and Stanković, B and Minić, D",
year = "1991",
abstract = "The electrochemical behavior of 1‐(2‐phenyl‐2‐hydroxyiminoethyl)‐1‐quinolinium chloride (F‐1) and 1‐(2‐phenyl‐2‐hydroxyiminoethyl)‐1‐isoquinolinium chloride (F‐2) was investigated using dc and differential pulse polarography (DPP) and cyclic voltammetry. Well‐defined, diffusion‐controlled, cathodic waves were observed for F‐1 only in strong acidic solution (pH 1.25 HCl) and for F‐2 in the H range 1.25–5.33 (HCl and Britton–Robinson buffer). The overall reduction of the azomethine group to a primary amine, a process that involves the uptake of four electrons, is irreversible. For both oximes a mechanism of reduction has been proposed. The rapid and accurate determination of these quinolinium and isoquinolinium oximes is possible by dc polarography and by DPP. Limits of detection are 5 × 10−7 M for both oximes using DPP.",
journal = "Electroanalysis",
title = "Electrochemical behavior and determination of quinolinium and isoquinolinium oximes",
volume = "3",
number = "2",
pages = "139-144",
doi = "10.1002/elan.1140030211"
}

Karljiković-Rajić, K., Jovanović, M., Korićanac, Z., Stanković, B.,& Minić, D.. (1991). Electrochemical behavior and determination of quinolinium and isoquinolinium oximes. in Electroanalysis, 3(2), 139-144.
https://doi.org/10.1002/elan.1140030211

Karljiković-Rajić K, Jovanović M, Korićanac Z, Stanković B, Minić D. Electrochemical behavior and determination of quinolinium and isoquinolinium oximes. in Electroanalysis. 1991;3(2):139-144.
doi:10.1002/elan.1140030211 .

Karljiković-Rajić, Katarina, Jovanović, M, Korićanac, Zagorka, Stanković, B, Minić, D, "Electrochemical behavior and determination of quinolinium and isoquinolinium oximes" in Electroanalysis, 3, no. 2 (1991):139-144,
https://doi.org/10.1002/elan.1140030211 . .

TY  - JOUR
AU  - Korićanac, Zagorka
AU  - Karljiković-Rajić, Katarina
AU  - Stanković, B
PY  - 1990
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/79
AB  - The colour reaction of TMB-4 and palladium(II) chloride has been investigated. The optimum reaction conditions, spectral characteristics, stability constant and composition of the yellow water-soluble complex have been established. A new spectrophotometric method is proposed for microdetermination of TMB-4.
T2  - Talanta
T1  - Determination of 1,3-bis(4-hydroxyiminomethylpyridinium)-propane dichloride (TMB-4) with Pd(II)
VL  - 37
IS  - 5
SP  - 535
EP  - 537
DO  - 10.1016/0039-9140(90)80079-U
ER  - 

@article{
author = "Korićanac, Zagorka and Karljiković-Rajić, Katarina and Stanković, B",
year = "1990",
abstract = "The colour reaction of TMB-4 and palladium(II) chloride has been investigated. The optimum reaction conditions, spectral characteristics, stability constant and composition of the yellow water-soluble complex have been established. A new spectrophotometric method is proposed for microdetermination of TMB-4.",
journal = "Talanta",
title = "Determination of 1,3-bis(4-hydroxyiminomethylpyridinium)-propane dichloride (TMB-4) with Pd(II)",
volume = "37",
number = "5",
pages = "535-537",
doi = "10.1016/0039-9140(90)80079-U"
}

Korićanac, Z., Karljiković-Rajić, K.,& Stanković, B.. (1990). Determination of 1,3-bis(4-hydroxyiminomethylpyridinium)-propane dichloride (TMB-4) with Pd(II). in Talanta, 37(5), 535-537.
https://doi.org/10.1016/0039-9140(90)80079-U

Korićanac Z, Karljiković-Rajić K, Stanković B. Determination of 1,3-bis(4-hydroxyiminomethylpyridinium)-propane dichloride (TMB-4) with Pd(II). in Talanta. 1990;37(5):535-537.
doi:10.1016/0039-9140(90)80079-U .

Korićanac, Zagorka, Karljiković-Rajić, Katarina, Stanković, B, "Determination of 1,3-bis(4-hydroxyiminomethylpyridinium)-propane dichloride (TMB-4) with Pd(II)" in Talanta, 37, no. 5 (1990):535-537,
https://doi.org/10.1016/0039-9140(90)80079-U . .

TY  - JOUR
AU  - Karljiković-Rajić, Katarina
AU  - Stanković, B
AU  - Korićanac, Zagorka
PY  - 1987
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/27
AB  - The polarographic behavior of 1‐[2‐phenyl‐2‐(hydroxyimino)ethyl]‐6‐methylquinolinium chloride has been investigated. The pH of the Britton‐Robinson buffer, used as supporting electrolyte, influences the position of the half‐wave potential which shifts towards more negative values with increasing pH. Well defined, diffusively controlled cathodic waves were observed in acid medium for the overall irreversible reduction of the azomethine group to a primary amino group. A single four‐electron reduction is obtained and a mechanism has been proposed for the reduction. The ratio id/c remains constant and allows a rapid and reproducible determination of the compound (CV = 0.54–2.10 %).
T2  - Archiv der Pharmazie
T1  - Reduction and Determination of 1‐[2‐Phenyl‐2‐(hydroxyimino)‐ethyl]‐6‐methylquinolinium Chloride on the Dropping Mercury Electrode
VL  - 320
IS  - 11
SP  - 1095
EP  - 1099
DO  - 10.1002/ardp.198700015
ER  - 

@article{
author = "Karljiković-Rajić, Katarina and Stanković, B and Korićanac, Zagorka",
year = "1987",
abstract = "The polarographic behavior of 1‐[2‐phenyl‐2‐(hydroxyimino)ethyl]‐6‐methylquinolinium chloride has been investigated. The pH of the Britton‐Robinson buffer, used as supporting electrolyte, influences the position of the half‐wave potential which shifts towards more negative values with increasing pH. Well defined, diffusively controlled cathodic waves were observed in acid medium for the overall irreversible reduction of the azomethine group to a primary amino group. A single four‐electron reduction is obtained and a mechanism has been proposed for the reduction. The ratio id/c remains constant and allows a rapid and reproducible determination of the compound (CV = 0.54–2.10 %).",
journal = "Archiv der Pharmazie",
title = "Reduction and Determination of 1‐[2‐Phenyl‐2‐(hydroxyimino)‐ethyl]‐6‐methylquinolinium Chloride on the Dropping Mercury Electrode",
volume = "320",
number = "11",
pages = "1095-1099",
doi = "10.1002/ardp.198700015"
}

Karljiković-Rajić, K., Stanković, B.,& Korićanac, Z.. (1987). Reduction and Determination of 1‐[2‐Phenyl‐2‐(hydroxyimino)‐ethyl]‐6‐methylquinolinium Chloride on the Dropping Mercury Electrode. in Archiv der Pharmazie, 320(11), 1095-1099.
https://doi.org/10.1002/ardp.198700015

Karljiković-Rajić K, Stanković B, Korićanac Z. Reduction and Determination of 1‐[2‐Phenyl‐2‐(hydroxyimino)‐ethyl]‐6‐methylquinolinium Chloride on the Dropping Mercury Electrode. in Archiv der Pharmazie. 1987;320(11):1095-1099.
doi:10.1002/ardp.198700015 .

Karljiković-Rajić, Katarina, Stanković, B, Korićanac, Zagorka, "Reduction and Determination of 1‐[2‐Phenyl‐2‐(hydroxyimino)‐ethyl]‐6‐methylquinolinium Chloride on the Dropping Mercury Electrode" in Archiv der Pharmazie, 320, no. 11 (1987):1095-1099,
https://doi.org/10.1002/ardp.198700015 . .

TY  - JOUR
AU  - Karljiković, Katarina
AU  - Stanković, B
AU  - Korićanac, Zagorka
PY  - 1986
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/26
T2  - Pharmazie
T1  - Polarographic investigation and determination of 1-(2-phenyl-2-hydroxyiminoethyl)-1-(4'-methyl)quinolinium chloride
VL  - 41
IS  - 9
SP  - 661
EP  - 662
UR  - https://hdl.handle.net/21.15107/rcub_farfar_26
ER  - 

@article{
author = "Karljiković, Katarina and Stanković, B and Korićanac, Zagorka",
year = "1986",
journal = "Pharmazie",
title = "Polarographic investigation and determination of 1-(2-phenyl-2-hydroxyiminoethyl)-1-(4'-methyl)quinolinium chloride",
volume = "41",
number = "9",
pages = "661-662",
url = "https://hdl.handle.net/21.15107/rcub_farfar_26"
}

Karljiković, K., Stanković, B.,& Korićanac, Z.. (1986). Polarographic investigation and determination of 1-(2-phenyl-2-hydroxyiminoethyl)-1-(4'-methyl)quinolinium chloride. in Pharmazie, 41(9), 661-662.
https://hdl.handle.net/21.15107/rcub_farfar_26

Karljiković K, Stanković B, Korićanac Z. Polarographic investigation and determination of 1-(2-phenyl-2-hydroxyiminoethyl)-1-(4'-methyl)quinolinium chloride. in Pharmazie. 1986;41(9):661-662.
https://hdl.handle.net/21.15107/rcub_farfar_26 .

Karljiković, Katarina, Stanković, B, Korićanac, Zagorka, "Polarographic investigation and determination of 1-(2-phenyl-2-hydroxyiminoethyl)-1-(4'-methyl)quinolinium chloride" in Pharmazie, 41, no. 9 (1986):661-662,
https://hdl.handle.net/21.15107/rcub_farfar_26 .