TY  - JOUR
AU  - Kulizić, Mihajlo
AU  - Stanković, Milan
AU  - Rašić, Marija
AU  - Mijatović, Aleksandar
AU  - Baošić, Rada
AU  - Lolić, Aleksandar
PY  - 2023
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/5406
AB  - In this paper, a simple, sensitive, and precise flow injection system was optimized and applied to ascorbic acid determination with a carbon paste electrode modified with the Schiff base copper complex. The modified sensor showed increased sensitivity toward ascorbic acid oxidation with a decrease of oxidation potential by 200 mV. Under optimized flow parameters, working potential, gasket thickness, sample and reaction coil volumes, and flow rate, the developed flow system gave a linear response from 5 to 75 μmol/L of ascorbic acid. The calculated limit of detection was 4.5 μmol/L, calculated as 3σ/s which corresponds to the absolute value of 40 ng for the 50 μL sample coil. The precision for six consecutive injections of 5 and 75 μmol/L ascorbic acid solutions was determined as a relative standard deviation of 5.8 % and 1.5 %, respectively. The flow injection system enabled up to 120 analyses per hour. An optimized flow system was applied to the determination of ascorbic acid in dietary supplements, after simple preparation.
PB  - John Wiley and Sons Inc
T2  - ChemistrySelect
T1  - A Simple Flow Injection System for Amperometric Detection of Ascorbic Acid Using Carbon Paste/Copper Schiff Base Composite Electrode
VL  - 8
IS  - 48
DO  - 10.1002/slct.202304631
ER  - 

@article{
author = "Kulizić, Mihajlo and Stanković, Milan and Rašić, Marija and Mijatović, Aleksandar and Baošić, Rada and Lolić, Aleksandar",
year = "2023",
abstract = "In this paper, a simple, sensitive, and precise flow injection system was optimized and applied to ascorbic acid determination with a carbon paste electrode modified with the Schiff base copper complex. The modified sensor showed increased sensitivity toward ascorbic acid oxidation with a decrease of oxidation potential by 200 mV. Under optimized flow parameters, working potential, gasket thickness, sample and reaction coil volumes, and flow rate, the developed flow system gave a linear response from 5 to 75 μmol/L of ascorbic acid. The calculated limit of detection was 4.5 μmol/L, calculated as 3σ/s which corresponds to the absolute value of 40 ng for the 50 μL sample coil. The precision for six consecutive injections of 5 and 75 μmol/L ascorbic acid solutions was determined as a relative standard deviation of 5.8 % and 1.5 %, respectively. The flow injection system enabled up to 120 analyses per hour. An optimized flow system was applied to the determination of ascorbic acid in dietary supplements, after simple preparation.",
publisher = "John Wiley and Sons Inc",
journal = "ChemistrySelect",
title = "A Simple Flow Injection System for Amperometric Detection of Ascorbic Acid Using Carbon Paste/Copper Schiff Base Composite Electrode",
volume = "8",
number = "48",
doi = "10.1002/slct.202304631"
}

Kulizić, M., Stanković, M., Rašić, M., Mijatović, A., Baošić, R.,& Lolić, A.. (2023). A Simple Flow Injection System for Amperometric Detection of Ascorbic Acid Using Carbon Paste/Copper Schiff Base Composite Electrode. in ChemistrySelect
John Wiley and Sons Inc., 8(48).
https://doi.org/10.1002/slct.202304631

Kulizić M, Stanković M, Rašić M, Mijatović A, Baošić R, Lolić A. A Simple Flow Injection System for Amperometric Detection of Ascorbic Acid Using Carbon Paste/Copper Schiff Base Composite Electrode. in ChemistrySelect. 2023;8(48).
doi:10.1002/slct.202304631 .

Kulizić, Mihajlo, Stanković, Milan, Rašić, Marija, Mijatović, Aleksandar, Baošić, Rada, Lolić, Aleksandar, "A Simple Flow Injection System for Amperometric Detection of Ascorbic Acid Using Carbon Paste/Copper Schiff Base Composite Electrode" in ChemistrySelect, 8, no. 48 (2023),
https://doi.org/10.1002/slct.202304631 . .

TY  - JOUR
AU  - Đogo-Mračević, Svetlana
AU  - Laketić, Tatjana
AU  - Stanković, Milan
AU  - Lolić, Aleksandar
PY  - 2023
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/4983
AB  - The aim of this research was to determine the content of arsenic (As), cadmium (Cd), lead (Pb), and nickel (Ni) in selected lipsticks and face foundations of different price categories and the health risk assessment associated with these toxic elements via dermal and oral exposure. The samples (10 lipstick and 10 face foundations) were purchased from local markets in Belgrade, Serbia. The samples were prepared by acid digestion and analyzed by atomic absorption spectrometry (flame atomization for Cd, Pb, and Ni and electrothermal atomization for As). Arsenic was found in 50% of lipstick samples and in only two face foundation samples with the highest concentration of 0.28 mg/kg in the lipstick sample. Lead concentration was in the range of 1.15 to 5.12 mg/kg in ten samples. Nickel was found in five samples out of 20, with the highest concentration of 4.20 mg/kg. Cadmium was found in only one face foundation sample in the cheaper price range (1.11 mg/kg). The obtained results indicate that concentrations of As, Pb, Cd, and Ni were within the permissible limits according to Serbian legislation. Health risk associated with these elements was assessed as non-carcinogenic and carcinogenic risk. Obtained hazard quotients (HQs) and hazard indexes (HIs) were below 1, indicating the absence of significant non-carcinogenic health risk due to exposure to these toxic elements (TEs). The carcinogenic risk results show that investigated cosmetic products can be considered low-risky due to the possibility of causing malignant disease.
PB  - Springer Nature
T2  - Environmental Monitoring and Assessment
T1  - Toxic element determination in selected cosmetic products: health risk assessment
VL  - 195
IS  - 9
DO  - 10.1007/s10661-023-11664-1
ER  - 

@article{
author = "Đogo-Mračević, Svetlana and Laketić, Tatjana and Stanković, Milan and Lolić, Aleksandar",
year = "2023",
abstract = "The aim of this research was to determine the content of arsenic (As), cadmium (Cd), lead (Pb), and nickel (Ni) in selected lipsticks and face foundations of different price categories and the health risk assessment associated with these toxic elements via dermal and oral exposure. The samples (10 lipstick and 10 face foundations) were purchased from local markets in Belgrade, Serbia. The samples were prepared by acid digestion and analyzed by atomic absorption spectrometry (flame atomization for Cd, Pb, and Ni and electrothermal atomization for As). Arsenic was found in 50% of lipstick samples and in only two face foundation samples with the highest concentration of 0.28 mg/kg in the lipstick sample. Lead concentration was in the range of 1.15 to 5.12 mg/kg in ten samples. Nickel was found in five samples out of 20, with the highest concentration of 4.20 mg/kg. Cadmium was found in only one face foundation sample in the cheaper price range (1.11 mg/kg). The obtained results indicate that concentrations of As, Pb, Cd, and Ni were within the permissible limits according to Serbian legislation. Health risk associated with these elements was assessed as non-carcinogenic and carcinogenic risk. Obtained hazard quotients (HQs) and hazard indexes (HIs) were below 1, indicating the absence of significant non-carcinogenic health risk due to exposure to these toxic elements (TEs). The carcinogenic risk results show that investigated cosmetic products can be considered low-risky due to the possibility of causing malignant disease.",
publisher = "Springer Nature",
journal = "Environmental Monitoring and Assessment",
title = "Toxic element determination in selected cosmetic products: health risk assessment",
volume = "195",
number = "9",
doi = "10.1007/s10661-023-11664-1"
}

Đogo-Mračević, S., Laketić, T., Stanković, M.,& Lolić, A.. (2023). Toxic element determination in selected cosmetic products: health risk assessment. in Environmental Monitoring and Assessment
Springer Nature., 195(9).
https://doi.org/10.1007/s10661-023-11664-1

Đogo-Mračević S, Laketić T, Stanković M, Lolić A. Toxic element determination in selected cosmetic products: health risk assessment. in Environmental Monitoring and Assessment. 2023;195(9).
doi:10.1007/s10661-023-11664-1 .

Đogo-Mračević, Svetlana, Laketić, Tatjana, Stanković, Milan, Lolić, Aleksandar, "Toxic element determination in selected cosmetic products: health risk assessment" in Environmental Monitoring and Assessment, 195, no. 9 (2023),
https://doi.org/10.1007/s10661-023-11664-1 . .

TY  - JOUR
AU  - Đogo-Mračević, Svetlana
AU  - Krstić, Marko
AU  - Lolić, Aleksandar
AU  - Ražić, Slavica
PY  - 2020
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/3471
AB  - A chemical characterization and biological activity of 7 honey types (multifloral, linden, rapeseed, sunflower,
phacelia, acacia and honeydew honey) from different regions of Serbia were presented. The physicochemical
characteristics, mineral content, antioxidant and antimicrobial activity were estimated and discussed. All honeys
showed good nutritional characteristics, according to the adopted criteria of the standard codex for honey. The
concentrations of 15 elements in honey samples were determined using inductively coupled plasma optical
emission spectroscopy (ICP-OES). Limits of quantification were in the range from 0.003 mg/kg (Cd, Cr, Cu, Mn,
and Pb) to 1.50 mg/kg for sodium. Precision was expressed as relative standard deviation and its values were
lower than 1.50%. Accuracy was evaluated with certified reference material (fish protein, DORM 4, NRC and
cooking chocolate, SRM 2384, NIST) and obtained recovery percentages were 71-127%. The content of the most
abundant elements (K, Mg, and Na) and microelements (Al, Cu, Fe, Mn, Ni, Se, Si, and Zn) showed a significant
variability in accordance of their botanical and geographical origin, but also the influence of harvest conditions.
The levels of toxic metals (As, Cd, Cr, and Pb) are much lower than the maximal allowed for these metals
according to European Commission Regulation. The antioxidant activity was evaluated by DPPH
(Diphenylpicrylhydrazyl) assay while antimicrobial activity against Gram positive and Gram negative bacteria
(E. coli and S. aureus) and fungi Candidi albicans was estimated by microdilution assay. The free radical
scavenging assay (%RSA) varies significantly among the honey samples. The highest antioxidant activity was
observed with honeydew honeys (over 75% RSA) and the lowest was observed in the acacia, ranging from 22.96
to 24.57% RSA. All honeys tested in this study exhibited antibacterial activity, with inhibition of bacterial
growth, generally the higher against E. coli (80% for linden honeys) than against S. aureus (mostly much lower
than 50%). Activity against Candidi albicans was almost negligible. The dataset composed of all experimental
results was subjected to a chemometric evaluation and cluster analysis as hierarchical nonsupervised method
was applied. According to the obtained outcome of applied algorithms, both botanical and geographical origin
have important role in the elemental composition, antioxidant and antimicrobial activities.
PB  - Elsevier
T2  - Microchemical Journal
T1  - Comparative study of the chemical composition and biological potential of honey from different regions of Serbia
VL  - 152
IS  - 104420
SP  - 1
EP  - 9
DO  - 10.1016/j.microc.2019.104420
ER  - 

@article{
author = "Đogo-Mračević, Svetlana and Krstić, Marko and Lolić, Aleksandar and Ražić, Slavica",
year = "2020",
abstract = "A chemical characterization and biological activity of 7 honey types (multifloral, linden, rapeseed, sunflower,
phacelia, acacia and honeydew honey) from different regions of Serbia were presented. The physicochemical
characteristics, mineral content, antioxidant and antimicrobial activity were estimated and discussed. All honeys
showed good nutritional characteristics, according to the adopted criteria of the standard codex for honey. The
concentrations of 15 elements in honey samples were determined using inductively coupled plasma optical
emission spectroscopy (ICP-OES). Limits of quantification were in the range from 0.003 mg/kg (Cd, Cr, Cu, Mn,
and Pb) to 1.50 mg/kg for sodium. Precision was expressed as relative standard deviation and its values were
lower than 1.50%. Accuracy was evaluated with certified reference material (fish protein, DORM 4, NRC and
cooking chocolate, SRM 2384, NIST) and obtained recovery percentages were 71-127%. The content of the most
abundant elements (K, Mg, and Na) and microelements (Al, Cu, Fe, Mn, Ni, Se, Si, and Zn) showed a significant
variability in accordance of their botanical and geographical origin, but also the influence of harvest conditions.
The levels of toxic metals (As, Cd, Cr, and Pb) are much lower than the maximal allowed for these metals
according to European Commission Regulation. The antioxidant activity was evaluated by DPPH
(Diphenylpicrylhydrazyl) assay while antimicrobial activity against Gram positive and Gram negative bacteria
(E. coli and S. aureus) and fungi Candidi albicans was estimated by microdilution assay. The free radical
scavenging assay (%RSA) varies significantly among the honey samples. The highest antioxidant activity was
observed with honeydew honeys (over 75% RSA) and the lowest was observed in the acacia, ranging from 22.96
to 24.57% RSA. All honeys tested in this study exhibited antibacterial activity, with inhibition of bacterial
growth, generally the higher against E. coli (80% for linden honeys) than against S. aureus (mostly much lower
than 50%). Activity against Candidi albicans was almost negligible. The dataset composed of all experimental
results was subjected to a chemometric evaluation and cluster analysis as hierarchical nonsupervised method
was applied. According to the obtained outcome of applied algorithms, both botanical and geographical origin
have important role in the elemental composition, antioxidant and antimicrobial activities.",
publisher = "Elsevier",
journal = "Microchemical Journal",
title = "Comparative study of the chemical composition and biological potential of honey from different regions of Serbia",
volume = "152",
number = "104420",
pages = "1-9",
doi = "10.1016/j.microc.2019.104420"
}

Đogo-Mračević, S., Krstić, M., Lolić, A.,& Ražić, S.. (2020). Comparative study of the chemical composition and biological potential of honey from different regions of Serbia. in Microchemical Journal
Elsevier., 152(104420), 1-9.
https://doi.org/10.1016/j.microc.2019.104420

Đogo-Mračević S, Krstić M, Lolić A, Ražić S. Comparative study of the chemical composition and biological potential of honey from different regions of Serbia. in Microchemical Journal. 2020;152(104420):1-9.
doi:10.1016/j.microc.2019.104420 .

Đogo-Mračević, Svetlana, Krstić, Marko, Lolić, Aleksandar, Ražić, Slavica, "Comparative study of the chemical composition and biological potential of honey from different regions of Serbia" in Microchemical Journal, 152, no. 104420 (2020):1-9,
https://doi.org/10.1016/j.microc.2019.104420 . .