Ćirić, Andrija

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orcid::0000-0002-5698-5510
  • Ćirić, Andrija (6)
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Author's Bibliography

Spectrophotometric zinc(II) based determination of quercetin in pharmaceutical formulations

Pavun, Leposava; Ćirić, Andrija; Milenković, Marina; Uskoković-Marković, Snežana

(Society of Chemists and Technologists of Macedonia, 2018)

TY  - CONF
AU  - Pavun, Leposava
AU  - Ćirić, Andrija
AU  - Milenković, Marina
AU  - Uskoković-Marković, Snežana
PY  - 2018
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/5220
AB  - Flavonoids are a group of polyphenolic compounds widely present in the herbal world
representing an important part of human diet. Quercetin, which is a flavanol, makes 70% of total daily
intake of flavonoids. Because of the characteristic chemical structure, quercetin has the ability of
complexing metals and antioxidative ability.
Using equimolar solution variation method it was determined that quercetin makes a complex
with zinc(II)-ion in acidic environment (pH 5.25), in stoichiometric relation quercetin:zinc(II)-ion =
2:1, with absorption maximum on λmax=363 nm. The ability of quercetin to make complex
compounds with zinc(II)-ion was used to develop simple, precise and accurate assay to determine the
content of quercetin in various samples of heterogeneous composition.
The proposed indirect spectrophotometric method can selectively determine quercetin in
concentrations ranging from 0.1 to 6.0 mg/L. LOD and LOQ were derived from the calibration curve
and estimated as 0.03 mg/L and 0.1 mg/L respectively. Developed method is reproductive and
accurate, as indicated by high value of correlation coefficient R=0.99996 and low value of
SD=0.00122. Method was successfully used to determine quercetin content in dietary supplement
tablets. Dietary supplements, proscribed for therapeutic and/or profilactic pruposes, usualy content
quercetin combined with other flavonoids and ascorbic acid. Therefore, it was necessary to test the
selectivity of proposed method.
The reliability of the method was checked out by newly developed RP-HPLC/UV method for
capsules with direct determination of quercetin after separation. The good agreement between the two
methods indicates the applicability of the proposed spectrophotometric method for quercetin
determination in dietary supplement tablets with high reproducibility, and enables direct and simple
determination without its prior extraction from samples.
In addition, the antioxidative ability of quecetin and zinc(II)-quercetin complex was
determined using oxidation-reduction standardized methods DPPH and FRAP. The same samples
were tested for antimicrobial activity against seven laboratory control strains of bacteria and one
yeast. As a result of those tests, there are no obstacles to combine quercetin and zinc in the same
formulation.
PB  - Society of Chemists and Technologists of Macedonia
C3  - 25th Congress of Chemists and Technologists of Macedonia, 19–22 September 2018, Ohrid, R. Macedonia
T1  - Spectrophotometric zinc(II) based determination of quercetin in pharmaceutical formulations
SP  - 119
EP  - 119
UR  - https://hdl.handle.net/21.15107/rcub_farfar_5220
ER  - 
@conference{
author = "Pavun, Leposava and Ćirić, Andrija and Milenković, Marina and Uskoković-Marković, Snežana",
year = "2018",
abstract = "Flavonoids are a group of polyphenolic compounds widely present in the herbal world
representing an important part of human diet. Quercetin, which is a flavanol, makes 70% of total daily
intake of flavonoids. Because of the characteristic chemical structure, quercetin has the ability of
complexing metals and antioxidative ability.
Using equimolar solution variation method it was determined that quercetin makes a complex
with zinc(II)-ion in acidic environment (pH 5.25), in stoichiometric relation quercetin:zinc(II)-ion =
2:1, with absorption maximum on λmax=363 nm. The ability of quercetin to make complex
compounds with zinc(II)-ion was used to develop simple, precise and accurate assay to determine the
content of quercetin in various samples of heterogeneous composition.
The proposed indirect spectrophotometric method can selectively determine quercetin in
concentrations ranging from 0.1 to 6.0 mg/L. LOD and LOQ were derived from the calibration curve
and estimated as 0.03 mg/L and 0.1 mg/L respectively. Developed method is reproductive and
accurate, as indicated by high value of correlation coefficient R=0.99996 and low value of
SD=0.00122. Method was successfully used to determine quercetin content in dietary supplement
tablets. Dietary supplements, proscribed for therapeutic and/or profilactic pruposes, usualy content
quercetin combined with other flavonoids and ascorbic acid. Therefore, it was necessary to test the
selectivity of proposed method.
The reliability of the method was checked out by newly developed RP-HPLC/UV method for
capsules with direct determination of quercetin after separation. The good agreement between the two
methods indicates the applicability of the proposed spectrophotometric method for quercetin
determination in dietary supplement tablets with high reproducibility, and enables direct and simple
determination without its prior extraction from samples.
In addition, the antioxidative ability of quecetin and zinc(II)-quercetin complex was
determined using oxidation-reduction standardized methods DPPH and FRAP. The same samples
were tested for antimicrobial activity against seven laboratory control strains of bacteria and one
yeast. As a result of those tests, there are no obstacles to combine quercetin and zinc in the same
formulation.",
publisher = "Society of Chemists and Technologists of Macedonia",
journal = "25th Congress of Chemists and Technologists of Macedonia, 19–22 September 2018, Ohrid, R. Macedonia",
title = "Spectrophotometric zinc(II) based determination of quercetin in pharmaceutical formulations",
pages = "119-119",
url = "https://hdl.handle.net/21.15107/rcub_farfar_5220"
}
Pavun, L., Ćirić, A., Milenković, M.,& Uskoković-Marković, S.. (2018). Spectrophotometric zinc(II) based determination of quercetin in pharmaceutical formulations. in 25th Congress of Chemists and Technologists of Macedonia, 19–22 September 2018, Ohrid, R. Macedonia
Society of Chemists and Technologists of Macedonia., 119-119.
https://hdl.handle.net/21.15107/rcub_farfar_5220
Pavun L, Ćirić A, Milenković M, Uskoković-Marković S. Spectrophotometric zinc(II) based determination of quercetin in pharmaceutical formulations. in 25th Congress of Chemists and Technologists of Macedonia, 19–22 September 2018, Ohrid, R. Macedonia. 2018;:119-119.
https://hdl.handle.net/21.15107/rcub_farfar_5220 .
Pavun, Leposava, Ćirić, Andrija, Milenković, Marina, Uskoković-Marković, Snežana, "Spectrophotometric zinc(II) based determination of quercetin in pharmaceutical formulations" in 25th Congress of Chemists and Technologists of Macedonia, 19–22 September 2018, Ohrid, R. Macedonia (2018):119-119,
https://hdl.handle.net/21.15107/rcub_farfar_5220 .

Zinc complex-based determination of rutin in dietary supplements

Pavun, Leposava; Jelikić-Stankov, Milena; Đurđević, Predrag; Ćirić, Andrija; Uskoković-Marković, Snežana

(Soc Chemists Technologists Madeconia, Skopje, 2016)

TY  - JOUR
AU  - Pavun, Leposava
AU  - Jelikić-Stankov, Milena
AU  - Đurđević, Predrag
AU  - Ćirić, Andrija
AU  - Uskoković-Marković, Snežana
PY  - 2016
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/2751
AB  - The aim of this study was to develop and validate a simple, rapid, sensitive and low-cost method for determination of rutin in tablets. The proposed spectrophotometric method is based on the formation of the Zn2+-rutin complex in methanol 70% (v/v) at pH 8.52, and detection at lambda(max)= 410 nm. The concentration range over which the response was linear was 0.3-12.2 mu g ml(-1). The limit of detection (LOD) and the limit of quantification (LOQ) were 0.21 mu g ml(-1) and 0.63 mu g ml(-1), respectively. The proposed method was successfully applied to the determination of rutin in herbal dietary supplements. The reliability of the method was checked by comparison with results obtained by the established RP-HPLC/UV method. The proposed method fulfills all aimed requirements.
PB  - Soc Chemists Technologists Madeconia, Skopje
T2  - Macedonian Journal of Chemistry and Chemical Engineering
T1  - Zinc complex-based determination of rutin in dietary supplements
VL  - 35
IS  - 1
SP  - 13
EP  - 18
DO  - 10.20450/mjcce.2016.897
ER  - 
@article{
author = "Pavun, Leposava and Jelikić-Stankov, Milena and Đurđević, Predrag and Ćirić, Andrija and Uskoković-Marković, Snežana",
year = "2016",
abstract = "The aim of this study was to develop and validate a simple, rapid, sensitive and low-cost method for determination of rutin in tablets. The proposed spectrophotometric method is based on the formation of the Zn2+-rutin complex in methanol 70% (v/v) at pH 8.52, and detection at lambda(max)= 410 nm. The concentration range over which the response was linear was 0.3-12.2 mu g ml(-1). The limit of detection (LOD) and the limit of quantification (LOQ) were 0.21 mu g ml(-1) and 0.63 mu g ml(-1), respectively. The proposed method was successfully applied to the determination of rutin in herbal dietary supplements. The reliability of the method was checked by comparison with results obtained by the established RP-HPLC/UV method. The proposed method fulfills all aimed requirements.",
publisher = "Soc Chemists Technologists Madeconia, Skopje",
journal = "Macedonian Journal of Chemistry and Chemical Engineering",
title = "Zinc complex-based determination of rutin in dietary supplements",
volume = "35",
number = "1",
pages = "13-18",
doi = "10.20450/mjcce.2016.897"
}
Pavun, L., Jelikić-Stankov, M., Đurđević, P., Ćirić, A.,& Uskoković-Marković, S.. (2016). Zinc complex-based determination of rutin in dietary supplements. in Macedonian Journal of Chemistry and Chemical Engineering
Soc Chemists Technologists Madeconia, Skopje., 35(1), 13-18.
https://doi.org/10.20450/mjcce.2016.897
Pavun L, Jelikić-Stankov M, Đurđević P, Ćirić A, Uskoković-Marković S. Zinc complex-based determination of rutin in dietary supplements. in Macedonian Journal of Chemistry and Chemical Engineering. 2016;35(1):13-18.
doi:10.20450/mjcce.2016.897 .
Pavun, Leposava, Jelikić-Stankov, Milena, Đurđević, Predrag, Ćirić, Andrija, Uskoković-Marković, Snežana, "Zinc complex-based determination of rutin in dietary supplements" in Macedonian Journal of Chemistry and Chemical Engineering, 35, no. 1 (2016):13-18,
https://doi.org/10.20450/mjcce.2016.897 . .
3
1
3

Spectrofluorimetric determination of quercetin in pharmaceutical dosage forms

Pavun, Leposava; Đurđević, Predrag; Jelikić-Stankov, Milena; Đikanović, Daniela; Ćirić, Andrija; Uskoković-Marković, Snežana

(Soc Chemists Technologists Madeconia, Skopje, 2014)

TY  - JOUR
AU  - Pavun, Leposava
AU  - Đurđević, Predrag
AU  - Jelikić-Stankov, Milena
AU  - Đikanović, Daniela
AU  - Ćirić, Andrija
AU  - Uskoković-Marković, Snežana
PY  - 2014
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/2116
AB  - A simple, accurate and precise method based on the fluorescence properties of the aluminum(III)-quercetin complex, for the determination of quercetin, has been developed and validated. The complex has strong emission at pH 3.30, lambda(em) = 480 nm, with lambda(ex) = 420 nm. The linearity range of quercetin determination was 1.5-60.5 ng ml(-1) with LOD 0.09 ng ml(-1) and LOQ 0.27 ng ml(-1). Recovery values in the range of 99.9-100.2% indicate a good accuracy of the method. The established method was applied for the determination of quercetin in capsules, with a recovery value of 98.3%, standard deviation of 0.22% and coefficient of variation of 0.09%. The reliability of the method was checked by the newly developed RP-HPLC/UV method for capsules with the direct determination of quercetin after separation. The good agreement between the two methods indicates the applicability of the proposed spectrofluorimetric method for quercetin determination in pharmaceutical dosage forms, with high reproducibility, and enables the direct and simple determination without its prior extraction from samples. The proposed spectrofluorimetric method has much better sensitivity and LOD and LOQ values that are about 1000 times lower than data reported in the literature.
PB  - Soc Chemists Technologists Madeconia, Skopje
T2  - Macedonian Journal of Chemistry and Chemical Engineering
T1  - Spectrofluorimetric determination of quercetin in pharmaceutical dosage forms
VL  - 33
IS  - 2
SP  - 209
EP  - 215
DO  - 10.20450/mjcce.2014.496
ER  - 
@article{
author = "Pavun, Leposava and Đurđević, Predrag and Jelikić-Stankov, Milena and Đikanović, Daniela and Ćirić, Andrija and Uskoković-Marković, Snežana",
year = "2014",
abstract = "A simple, accurate and precise method based on the fluorescence properties of the aluminum(III)-quercetin complex, for the determination of quercetin, has been developed and validated. The complex has strong emission at pH 3.30, lambda(em) = 480 nm, with lambda(ex) = 420 nm. The linearity range of quercetin determination was 1.5-60.5 ng ml(-1) with LOD 0.09 ng ml(-1) and LOQ 0.27 ng ml(-1). Recovery values in the range of 99.9-100.2% indicate a good accuracy of the method. The established method was applied for the determination of quercetin in capsules, with a recovery value of 98.3%, standard deviation of 0.22% and coefficient of variation of 0.09%. The reliability of the method was checked by the newly developed RP-HPLC/UV method for capsules with the direct determination of quercetin after separation. The good agreement between the two methods indicates the applicability of the proposed spectrofluorimetric method for quercetin determination in pharmaceutical dosage forms, with high reproducibility, and enables the direct and simple determination without its prior extraction from samples. The proposed spectrofluorimetric method has much better sensitivity and LOD and LOQ values that are about 1000 times lower than data reported in the literature.",
publisher = "Soc Chemists Technologists Madeconia, Skopje",
journal = "Macedonian Journal of Chemistry and Chemical Engineering",
title = "Spectrofluorimetric determination of quercetin in pharmaceutical dosage forms",
volume = "33",
number = "2",
pages = "209-215",
doi = "10.20450/mjcce.2014.496"
}
Pavun, L., Đurđević, P., Jelikić-Stankov, M., Đikanović, D., Ćirić, A.,& Uskoković-Marković, S.. (2014). Spectrofluorimetric determination of quercetin in pharmaceutical dosage forms. in Macedonian Journal of Chemistry and Chemical Engineering
Soc Chemists Technologists Madeconia, Skopje., 33(2), 209-215.
https://doi.org/10.20450/mjcce.2014.496
Pavun L, Đurđević P, Jelikić-Stankov M, Đikanović D, Ćirić A, Uskoković-Marković S. Spectrofluorimetric determination of quercetin in pharmaceutical dosage forms. in Macedonian Journal of Chemistry and Chemical Engineering. 2014;33(2):209-215.
doi:10.20450/mjcce.2014.496 .
Pavun, Leposava, Đurđević, Predrag, Jelikić-Stankov, Milena, Đikanović, Daniela, Ćirić, Andrija, Uskoković-Marković, Snežana, "Spectrofluorimetric determination of quercetin in pharmaceutical dosage forms" in Macedonian Journal of Chemistry and Chemical Engineering, 33, no. 2 (2014):209-215,
https://doi.org/10.20450/mjcce.2014.496 . .
11
6
11

Chemometric-Assisted Optimization of RP-HPLC Method for Determination of Some Bioflavonoids in Brassica oleracea Species and Their Antioxidative Activity

Ćirić, Andrija; Ivanović, Nevena; Cvijović, Milica S.; Jelikić-Stankov, Milena; Joksović, Ljubinka; Đurđević, Predrag

(Springer, New York, 2014)

TY  - JOUR
AU  - Ćirić, Andrija
AU  - Ivanović, Nevena
AU  - Cvijović, Milica S.
AU  - Jelikić-Stankov, Milena
AU  - Joksović, Ljubinka
AU  - Đurđević, Predrag
PY  - 2014
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/2216
AB  - In the present work, the rapid RP-HPLC method with UV (DAD) detection for simultaneous quantification of bioflavonoids: quercetin, apigenin, catechin, epicatechin, kaempferol, and luteolin in Brassica oleracea species samples (cauliflower, broccoli, and Brussels sprouts) was developed with the aid of LC-Simulator (ACD LabsA (R) suite) software. A series of extracts obtained with different extraction method were evaluated for antioxidant activity. The optimal conditions for separation and quantification were established after nine scouting runs entered to LC-Simulator software. The optimized separation was achieved on Hypersil GOLD aQ column with isocratic elution and mobile phase composition A:2 % acetic acid in water and B:acetonitrile in 91:9 (v/v %) ratio. The R (s) values were in the range from 2.6 to 8.00, indicating good selectivity of the method. The obtained results generally show good agreement with published data. Low detection limits (0.02-0.055 mu g/mL) were obtained with acceptable recoveries (90-109 %). Total time of analysis was less than 11 min; therefore, the proposed method represents significant improvement over existing methods. Extracts from Brassica vegetables, obtained using different extraction procedures, were studied for their radical scavenging effects. Scavenging of DPPH showed different kinetics at the beginning of the assay period and after 15 min from the initialization of reaction. Different kinetics suggested the presence of polymerized and/or less active antioxidants with different scavenging mechanisms for particular polyphenolic compounds.
PB  - Springer, New York
T2  - Food Analytical Methods
T1  - Chemometric-Assisted Optimization of RP-HPLC Method for Determination of Some Bioflavonoids in Brassica oleracea Species and Their Antioxidative Activity
VL  - 7
IS  - 7
SP  - 1387
EP  - 1399
DO  - 10.1007/s12161-013-9761-y
ER  - 
@article{
author = "Ćirić, Andrija and Ivanović, Nevena and Cvijović, Milica S. and Jelikić-Stankov, Milena and Joksović, Ljubinka and Đurđević, Predrag",
year = "2014",
abstract = "In the present work, the rapid RP-HPLC method with UV (DAD) detection for simultaneous quantification of bioflavonoids: quercetin, apigenin, catechin, epicatechin, kaempferol, and luteolin in Brassica oleracea species samples (cauliflower, broccoli, and Brussels sprouts) was developed with the aid of LC-Simulator (ACD LabsA (R) suite) software. A series of extracts obtained with different extraction method were evaluated for antioxidant activity. The optimal conditions for separation and quantification were established after nine scouting runs entered to LC-Simulator software. The optimized separation was achieved on Hypersil GOLD aQ column with isocratic elution and mobile phase composition A:2 % acetic acid in water and B:acetonitrile in 91:9 (v/v %) ratio. The R (s) values were in the range from 2.6 to 8.00, indicating good selectivity of the method. The obtained results generally show good agreement with published data. Low detection limits (0.02-0.055 mu g/mL) were obtained with acceptable recoveries (90-109 %). Total time of analysis was less than 11 min; therefore, the proposed method represents significant improvement over existing methods. Extracts from Brassica vegetables, obtained using different extraction procedures, were studied for their radical scavenging effects. Scavenging of DPPH showed different kinetics at the beginning of the assay period and after 15 min from the initialization of reaction. Different kinetics suggested the presence of polymerized and/or less active antioxidants with different scavenging mechanisms for particular polyphenolic compounds.",
publisher = "Springer, New York",
journal = "Food Analytical Methods",
title = "Chemometric-Assisted Optimization of RP-HPLC Method for Determination of Some Bioflavonoids in Brassica oleracea Species and Their Antioxidative Activity",
volume = "7",
number = "7",
pages = "1387-1399",
doi = "10.1007/s12161-013-9761-y"
}
Ćirić, A., Ivanović, N., Cvijović, M. S., Jelikić-Stankov, M., Joksović, L.,& Đurđević, P.. (2014). Chemometric-Assisted Optimization of RP-HPLC Method for Determination of Some Bioflavonoids in Brassica oleracea Species and Their Antioxidative Activity. in Food Analytical Methods
Springer, New York., 7(7), 1387-1399.
https://doi.org/10.1007/s12161-013-9761-y
Ćirić A, Ivanović N, Cvijović MS, Jelikić-Stankov M, Joksović L, Đurđević P. Chemometric-Assisted Optimization of RP-HPLC Method for Determination of Some Bioflavonoids in Brassica oleracea Species and Their Antioxidative Activity. in Food Analytical Methods. 2014;7(7):1387-1399.
doi:10.1007/s12161-013-9761-y .
Ćirić, Andrija, Ivanović, Nevena, Cvijović, Milica S., Jelikić-Stankov, Milena, Joksović, Ljubinka, Đurđević, Predrag, "Chemometric-Assisted Optimization of RP-HPLC Method for Determination of Some Bioflavonoids in Brassica oleracea Species and Their Antioxidative Activity" in Food Analytical Methods, 7, no. 7 (2014):1387-1399,
https://doi.org/10.1007/s12161-013-9761-y . .
1
1

Development and validation of a fluorometric method for the determination of hesperidin in human plasma and pharmaceutical forms

Pavun, Leposava; Dimitrić-Marković, Jasmina; Đurđević, Predrag; Jelikić-Stankov, Milena; Đikanović, Daniela; Ćirić, Andrija; Malešev, Dušan

(Srpsko hemijsko društvo, Beograd, 2012)

TY  - JOUR
AU  - Pavun, Leposava
AU  - Dimitrić-Marković, Jasmina
AU  - Đurđević, Predrag
AU  - Jelikić-Stankov, Milena
AU  - Đikanović, Daniela
AU  - Ćirić, Andrija
AU  - Malešev, Dušan
PY  - 2012
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/1821
AB  - A fluorometric method, based on the fluorescence properties of the aluminium(III)-hesperidin complex, for the determination of hesperidin in human plasma and pharmaceutical forms has been developed and validated. The complex shows a strong emission in the presence of the surfactant betain sulphonate SB 12 at 476 nm with excitation at 390 nm. The linearity range for pharmaceutical forms of hesperidin was 0.06-24.4 μg mL-1 with a limit of detection, LOD, of 0.016 μg mL-1 and a limit of quantification, LOQ, of 0.049 μg mL-1. Recovery values in the range 99.3-99.7 % indicate good accuracy of the method. A linear dependence of the intensity of fluorescence of the complex on the concentration of hesperidin in plasma was obtained in concentration range from 0.1-12.2 μg mL-1. The LOD was 0.032 μg mL-1 while LOQ was 0.096 μg mL-1. Recovery values were in the range 98.4-99.8 %. The reliability of the method was checked by an LC-MS/MS method for plasma samples and an HPLC/UV method for tablets with direct determination of hesperidin after separation. Linearity range in determination of hesperidin in pharmaceutical forms was obtained in the range from 0.05 to 10.00 μg mL-1. The LOD was 0.01 μg mL-1 and the LOQ was 0.03 μg mL-1. The linearity range for the determination of hesperidin in plasma was 0.02-10.00 μg mL-1 with an LOD 0.005 μg mL-1 and an LOQ of 0.015 μg mL-1. The good agreement between the two methods indicates the usability of the proposed fluorometric method for the simple, precise and accurate determination of hesperidin in clinical and quality control laboratories.
AB  - Razvijena je fluorimetrijska metoda za određivanje hesperidina u humanom serumu i farmaceutskim preparatima koja se zasniva na fluorescenciji kompleksa aluminijum(III)-hesperidin. Kompleks pokazuje intenzivnu fluorescenciju u prisustvu surfaktanta SB 12 na 476 nm prilikom ekscitacije na 390 nm. Linearna zavisnost intenziteta fluorescencije od koncentracije pri određivanju hesperidina u farmaceutskim preparatima dobijena je u koncentracionom opsegu 0,06-24,4 μg mL-1 sa granicom detekcije od 0,016 μg mL-1 i granicom kvantifikacije od 0,049 μg mL-1. Dobijene 'recovery' vrednosti u intervalu 99,3-99,7 % pokazuju veliku preciznost metode. Linearna zavisnost intenziteta fluorescencije kompeksa od koncentacije hesperidina dobijena je u koncentracionom opsegu 0,1-12,2 μg mL-1 sa granicom detekcije od 0,032 μg mL-1 i granicom kvantifikacije od 0,096 μg mL-1. 'Recovery' vrednosti su dobijene u opsegu 98,4 do 99,8 %. Pouzdanost metode proverena je LC-MS/MS metodom za određivanje hesperidina u serumu, a HPLC/UV metodom proverena je pouzdanost prilikom određivanja hesperidina u farmaceutskim preparatima. Linearna zavisnost pri određivanju hesperidina u farmaceutskim preparatima dobijena je u intervalu 0,05-10,00 μg mL-1. Granica detekcije je iznosila 0,01, a granica kvantifikacije je 0,03 μg mL-1. Linearna zavisnost pri određivanju hesperidina u humanom serumu je dobijena u intervalu 0,02-10,00 μg mL-1 sa granicom detekcije od 0,005 i granicom kvantifikacije od 0,015 μg mL-1. Dobro slaganje između ove dve metode pokazuje primenljivost fluorimetrijske metode u kliničkim laboratorijama i laboratorijama za kontrolu kvaliteta. Predložena fluorimetrijska metoda je jednostavna, pouzdana i precizna za određivanje hesperidina u humanom serumu i farmaceutskim preparatima.
PB  - Srpsko hemijsko društvo, Beograd
T2  - Journal of the Serbian Chemical Society
T1  - Development and validation of a fluorometric method for the determination of hesperidin in human plasma and pharmaceutical forms
T1  - Razvoj i validacija fluorimetrijske metode za određivanje hesperidina u humanom serumu i farmaceutskim preparatima
VL  - 77
IS  - 11
SP  - 1625
EP  - 1640
DO  - 10.2298/JSC111005060P
ER  - 
@article{
author = "Pavun, Leposava and Dimitrić-Marković, Jasmina and Đurđević, Predrag and Jelikić-Stankov, Milena and Đikanović, Daniela and Ćirić, Andrija and Malešev, Dušan",
year = "2012",
abstract = "A fluorometric method, based on the fluorescence properties of the aluminium(III)-hesperidin complex, for the determination of hesperidin in human plasma and pharmaceutical forms has been developed and validated. The complex shows a strong emission in the presence of the surfactant betain sulphonate SB 12 at 476 nm with excitation at 390 nm. The linearity range for pharmaceutical forms of hesperidin was 0.06-24.4 μg mL-1 with a limit of detection, LOD, of 0.016 μg mL-1 and a limit of quantification, LOQ, of 0.049 μg mL-1. Recovery values in the range 99.3-99.7 % indicate good accuracy of the method. A linear dependence of the intensity of fluorescence of the complex on the concentration of hesperidin in plasma was obtained in concentration range from 0.1-12.2 μg mL-1. The LOD was 0.032 μg mL-1 while LOQ was 0.096 μg mL-1. Recovery values were in the range 98.4-99.8 %. The reliability of the method was checked by an LC-MS/MS method for plasma samples and an HPLC/UV method for tablets with direct determination of hesperidin after separation. Linearity range in determination of hesperidin in pharmaceutical forms was obtained in the range from 0.05 to 10.00 μg mL-1. The LOD was 0.01 μg mL-1 and the LOQ was 0.03 μg mL-1. The linearity range for the determination of hesperidin in plasma was 0.02-10.00 μg mL-1 with an LOD 0.005 μg mL-1 and an LOQ of 0.015 μg mL-1. The good agreement between the two methods indicates the usability of the proposed fluorometric method for the simple, precise and accurate determination of hesperidin in clinical and quality control laboratories., Razvijena je fluorimetrijska metoda za određivanje hesperidina u humanom serumu i farmaceutskim preparatima koja se zasniva na fluorescenciji kompleksa aluminijum(III)-hesperidin. Kompleks pokazuje intenzivnu fluorescenciju u prisustvu surfaktanta SB 12 na 476 nm prilikom ekscitacije na 390 nm. Linearna zavisnost intenziteta fluorescencije od koncentracije pri određivanju hesperidina u farmaceutskim preparatima dobijena je u koncentracionom opsegu 0,06-24,4 μg mL-1 sa granicom detekcije od 0,016 μg mL-1 i granicom kvantifikacije od 0,049 μg mL-1. Dobijene 'recovery' vrednosti u intervalu 99,3-99,7 % pokazuju veliku preciznost metode. Linearna zavisnost intenziteta fluorescencije kompeksa od koncentacije hesperidina dobijena je u koncentracionom opsegu 0,1-12,2 μg mL-1 sa granicom detekcije od 0,032 μg mL-1 i granicom kvantifikacije od 0,096 μg mL-1. 'Recovery' vrednosti su dobijene u opsegu 98,4 do 99,8 %. Pouzdanost metode proverena je LC-MS/MS metodom za određivanje hesperidina u serumu, a HPLC/UV metodom proverena je pouzdanost prilikom određivanja hesperidina u farmaceutskim preparatima. Linearna zavisnost pri određivanju hesperidina u farmaceutskim preparatima dobijena je u intervalu 0,05-10,00 μg mL-1. Granica detekcije je iznosila 0,01, a granica kvantifikacije je 0,03 μg mL-1. Linearna zavisnost pri određivanju hesperidina u humanom serumu je dobijena u intervalu 0,02-10,00 μg mL-1 sa granicom detekcije od 0,005 i granicom kvantifikacije od 0,015 μg mL-1. Dobro slaganje između ove dve metode pokazuje primenljivost fluorimetrijske metode u kliničkim laboratorijama i laboratorijama za kontrolu kvaliteta. Predložena fluorimetrijska metoda je jednostavna, pouzdana i precizna za određivanje hesperidina u humanom serumu i farmaceutskim preparatima.",
publisher = "Srpsko hemijsko društvo, Beograd",
journal = "Journal of the Serbian Chemical Society",
title = "Development and validation of a fluorometric method for the determination of hesperidin in human plasma and pharmaceutical forms, Razvoj i validacija fluorimetrijske metode za određivanje hesperidina u humanom serumu i farmaceutskim preparatima",
volume = "77",
number = "11",
pages = "1625-1640",
doi = "10.2298/JSC111005060P"
}
Pavun, L., Dimitrić-Marković, J., Đurđević, P., Jelikić-Stankov, M., Đikanović, D., Ćirić, A.,& Malešev, D.. (2012). Development and validation of a fluorometric method for the determination of hesperidin in human plasma and pharmaceutical forms. in Journal of the Serbian Chemical Society
Srpsko hemijsko društvo, Beograd., 77(11), 1625-1640.
https://doi.org/10.2298/JSC111005060P
Pavun L, Dimitrić-Marković J, Đurđević P, Jelikić-Stankov M, Đikanović D, Ćirić A, Malešev D. Development and validation of a fluorometric method for the determination of hesperidin in human plasma and pharmaceutical forms. in Journal of the Serbian Chemical Society. 2012;77(11):1625-1640.
doi:10.2298/JSC111005060P .
Pavun, Leposava, Dimitrić-Marković, Jasmina, Đurđević, Predrag, Jelikić-Stankov, Milena, Đikanović, Daniela, Ćirić, Andrija, Malešev, Dušan, "Development and validation of a fluorometric method for the determination of hesperidin in human plasma and pharmaceutical forms" in Journal of the Serbian Chemical Society, 77, no. 11 (2012):1625-1640,
https://doi.org/10.2298/JSC111005060P . .
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Spectrofluorimetric and HPLC Determination of Morin in Human Serum

Pavun, Leposava; Đikanović, Daniela; Đurđević, Predrag; Jelikić-Stankov, Milena; Malešev, Dušan; Ćirić, Andrija

(Slovensko Kemijsko Drustvo, Ljubljana, 2009)

TY  - JOUR
AU  - Pavun, Leposava
AU  - Đikanović, Daniela
AU  - Đurđević, Predrag
AU  - Jelikić-Stankov, Milena
AU  - Malešev, Dušan
AU  - Ćirić, Andrija
PY  - 2009
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/1205
AB  - Morin is a flavonol antioxidant. In ethanol-water mixtures (70 wt% of ethanol) it reacts with Al(3+) to give Al(Morin)(2) in the pH range 3-6. The conditional stability constant of this complex at 298 K was found to be log beta(2) = 16.96 +/- 0.02 at pH 4.40. The complex shows strong fluorescence emission at 500 nm upon excitation at 410 nm. The fluorescence intensity is pH dependent with maximum emission at pH 4.40. Since the complexation reaction enhances the fluorescence of morin, this property was used for the determination of morin in human serum. A linear dependence of the intensity of fluorescence of the complex on the concentration of morin was obtained in morin concentration range from 1.5-30.5 ng mL(-1), relative standard error of measurements was 1.4%. The LOD was 0.02 ng mL(-1) while LOQ was 1.0 ng mL(-1). Serum concentration of morin was also determined using HPLC as a reference method. A C-18 Hypersil Gold AQ column was used with acetonitrile-0.1% v/v phosphoric acid (30:70% v/v) as the mobile phase at 1.0 mL min(-1) flow rate and UV detection at 250 nm. Acceptable relative standard errors (less than 5%) between determinations obtained by the two methods indicate that the fluorescence method is reliable.
PB  - Slovensko Kemijsko Drustvo, Ljubljana
T2  - Acta Chimica Slovenica
T1  - Spectrofluorimetric and HPLC Determination of Morin in Human Serum
VL  - 56
IS  - 4
SP  - 967
EP  - 972
UR  - https://hdl.handle.net/21.15107/rcub_farfar_1205
ER  - 
@article{
author = "Pavun, Leposava and Đikanović, Daniela and Đurđević, Predrag and Jelikić-Stankov, Milena and Malešev, Dušan and Ćirić, Andrija",
year = "2009",
abstract = "Morin is a flavonol antioxidant. In ethanol-water mixtures (70 wt% of ethanol) it reacts with Al(3+) to give Al(Morin)(2) in the pH range 3-6. The conditional stability constant of this complex at 298 K was found to be log beta(2) = 16.96 +/- 0.02 at pH 4.40. The complex shows strong fluorescence emission at 500 nm upon excitation at 410 nm. The fluorescence intensity is pH dependent with maximum emission at pH 4.40. Since the complexation reaction enhances the fluorescence of morin, this property was used for the determination of morin in human serum. A linear dependence of the intensity of fluorescence of the complex on the concentration of morin was obtained in morin concentration range from 1.5-30.5 ng mL(-1), relative standard error of measurements was 1.4%. The LOD was 0.02 ng mL(-1) while LOQ was 1.0 ng mL(-1). Serum concentration of morin was also determined using HPLC as a reference method. A C-18 Hypersil Gold AQ column was used with acetonitrile-0.1% v/v phosphoric acid (30:70% v/v) as the mobile phase at 1.0 mL min(-1) flow rate and UV detection at 250 nm. Acceptable relative standard errors (less than 5%) between determinations obtained by the two methods indicate that the fluorescence method is reliable.",
publisher = "Slovensko Kemijsko Drustvo, Ljubljana",
journal = "Acta Chimica Slovenica",
title = "Spectrofluorimetric and HPLC Determination of Morin in Human Serum",
volume = "56",
number = "4",
pages = "967-972",
url = "https://hdl.handle.net/21.15107/rcub_farfar_1205"
}
Pavun, L., Đikanović, D., Đurđević, P., Jelikić-Stankov, M., Malešev, D.,& Ćirić, A.. (2009). Spectrofluorimetric and HPLC Determination of Morin in Human Serum. in Acta Chimica Slovenica
Slovensko Kemijsko Drustvo, Ljubljana., 56(4), 967-972.
https://hdl.handle.net/21.15107/rcub_farfar_1205
Pavun L, Đikanović D, Đurđević P, Jelikić-Stankov M, Malešev D, Ćirić A. Spectrofluorimetric and HPLC Determination of Morin in Human Serum. in Acta Chimica Slovenica. 2009;56(4):967-972.
https://hdl.handle.net/21.15107/rcub_farfar_1205 .
Pavun, Leposava, Đikanović, Daniela, Đurđević, Predrag, Jelikić-Stankov, Milena, Malešev, Dušan, Ćirić, Andrija, "Spectrofluorimetric and HPLC Determination of Morin in Human Serum" in Acta Chimica Slovenica, 56, no. 4 (2009):967-972,
https://hdl.handle.net/21.15107/rcub_farfar_1205 .
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