TY  - JOUR
AU  - Vukčević, Marija
AU  - Kalijadis, Ana
AU  - Jovanović, Zoran M.
AU  - Laušević, Zoran
AU  - Laušević, Mila
PY  - 2011
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/1763
AB  - The surface of carbon monolith (CM) was chemically treated in order to obtain antibacterial filters with silver deposit for water treatment. The chemical treatment involved submerging the as-received CM in HNO(3), KOH and H(2)O(2) solution. The specific surface area was examined by N(2) adsorption. Silver deposition at the surface of CM samples was performed using cheap and simple procedure of immersing CM samples in aqueous solution of AgNO(3). Temperature programmed desorption method has been used in order to investigate the nature and thermal stability of surface oxygen groups before and after silver deposition. The composition and crystalinity of silver deposits have been examined by X-ray diffraction. Chemical treatment does not cause any drastic changes of CM specific surface area, but increases a total amount of surface oxides. Amount of deposited silver is several times higher for all chemically treated samples. The results show that increasing the amount of CO yielding groups on CM surface leads to increased amount of Ag deposit and decreases its crystallite sizes
PB  - Polish Acad Sciences Inst Physics, Warsaw
T2  - Acta Physica Polonica A
T1  - Carbon Monolith Surface Chemistry Influence on the Silver Deposit Amount and Crystallite Size
EP  - 288
IS  - 2
SP  - 284
VL  - 120
DO  - 10.12693/APhysPolA.120.284
ER  - 

@article{
author = "Vukčević, Marija and Kalijadis, Ana and Jovanović, Zoran M. and Laušević, Zoran and Laušević, Mila",
year = "2011",
abstract = "The surface of carbon monolith (CM) was chemically treated in order to obtain antibacterial filters with silver deposit for water treatment. The chemical treatment involved submerging the as-received CM in HNO(3), KOH and H(2)O(2) solution. The specific surface area was examined by N(2) adsorption. Silver deposition at the surface of CM samples was performed using cheap and simple procedure of immersing CM samples in aqueous solution of AgNO(3). Temperature programmed desorption method has been used in order to investigate the nature and thermal stability of surface oxygen groups before and after silver deposition. The composition and crystalinity of silver deposits have been examined by X-ray diffraction. Chemical treatment does not cause any drastic changes of CM specific surface area, but increases a total amount of surface oxides. Amount of deposited silver is several times higher for all chemically treated samples. The results show that increasing the amount of CO yielding groups on CM surface leads to increased amount of Ag deposit and decreases its crystallite sizes",
publisher = "Polish Acad Sciences Inst Physics, Warsaw",
journal = "Acta Physica Polonica A",
title = "Carbon Monolith Surface Chemistry Influence on the Silver Deposit Amount and Crystallite Size",
pages = "288-284",
number = "2",
volume = "120",
doi = "10.12693/APhysPolA.120.284"
}

Vukčević, M., Kalijadis, A., Jovanović, Z. M., Laušević, Z.,& Laušević, M.. (2011). Carbon Monolith Surface Chemistry Influence on the Silver Deposit Amount and Crystallite Size. in Acta Physica Polonica A
Polish Acad Sciences Inst Physics, Warsaw., 120(2), 284-288.
https://doi.org/10.12693/APhysPolA.120.284

Vukčević M, Kalijadis A, Jovanović ZM, Laušević Z, Laušević M. Carbon Monolith Surface Chemistry Influence on the Silver Deposit Amount and Crystallite Size. in Acta Physica Polonica A. 2011;120(2):284-288.
doi:10.12693/APhysPolA.120.284 .

Vukčević, Marija, Kalijadis, Ana, Jovanović, Zoran M., Laušević, Zoran, Laušević, Mila, "Carbon Monolith Surface Chemistry Influence on the Silver Deposit Amount and Crystallite Size" in Acta Physica Polonica A, 120, no. 2 (2011):284-288,
https://doi.org/10.12693/APhysPolA.120.284 . .

TY  - JOUR
AU  - Trtić-Petrović, Tatjana M.
AU  - Đorđević, Jelena S.
AU  - Dujaković, Nikolina
AU  - Kumrić, Ksenija
AU  - Vasiljević, Tatjana
AU  - Laušević, Mila
PY  - 2010
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5590
AB  - An optimised extraction and cleanup method for the analysis of pesticide in natural water samples is presented. Sixteen pesticides of different polarity and from the different chemical classes (organophosphates, triazines, benzimidazoles, carbamates, carbamides, neonicotinoides, methylureas, phenylureas and benzohydrazides), most frequently used in Serbia, were selected for the analysis. Liquid-phase microextraction in a single hollow fibre (HF-LPME) has been applied for sample preparation. The concentrations of pesticides were determined using HPLC-MS/MS method with electrospray ionisation. The extraction behaviour and selection of the experimental conditions was predicted based on log D and pK (a) values of targeted pesticides, which were calculated applying the computer software ACD/Labs PhysChem Suite v12. The influence of the donor pH and concentration of pesticides, organic phase composition as well as the extraction time on the extraction efficiency was investigated. Optimum extraction conditions were evaluated with respect to the investigated parameters of the extraction. The extraction method was validated for 10 out of 16 studied pesticides. Linear range of the pesticides was 0.1-5 A mu g L(-1) with the correlation coefficient from 0.991 to 0.9998, and the relative standard deviation for three standard measurements was between 0.2 and 11.8%. The limits of detections ranged from 0.026 to 0.237 A mu g L(-1) and the limits of quantifications from 0.094 to 0.793 A mu g L(-1). The optimised two-phase HF-LPME method was successfully applied for determination of moderately polar as well low-polar pesticides in the environmental water samples.
T2  - Analytical and Bioanalytical Chemistry
T1  - Determination of selected pesticides in environmental water by employing liquid-phase microextraction and liquid chromatography-tandem mass spectrometry
EP  - 2243
IS  - 6
SP  - 2233
VL  - 397
DO  - 10.1007/s00216-010-3725-5
ER  - 

@article{
author = "Trtić-Petrović, Tatjana M. and Đorđević, Jelena S. and Dujaković, Nikolina and Kumrić, Ksenija and Vasiljević, Tatjana and Laušević, Mila",
year = "2010",
abstract = "An optimised extraction and cleanup method for the analysis of pesticide in natural water samples is presented. Sixteen pesticides of different polarity and from the different chemical classes (organophosphates, triazines, benzimidazoles, carbamates, carbamides, neonicotinoides, methylureas, phenylureas and benzohydrazides), most frequently used in Serbia, were selected for the analysis. Liquid-phase microextraction in a single hollow fibre (HF-LPME) has been applied for sample preparation. The concentrations of pesticides were determined using HPLC-MS/MS method with electrospray ionisation. The extraction behaviour and selection of the experimental conditions was predicted based on log D and pK (a) values of targeted pesticides, which were calculated applying the computer software ACD/Labs PhysChem Suite v12. The influence of the donor pH and concentration of pesticides, organic phase composition as well as the extraction time on the extraction efficiency was investigated. Optimum extraction conditions were evaluated with respect to the investigated parameters of the extraction. The extraction method was validated for 10 out of 16 studied pesticides. Linear range of the pesticides was 0.1-5 A mu g L(-1) with the correlation coefficient from 0.991 to 0.9998, and the relative standard deviation for three standard measurements was between 0.2 and 11.8%. The limits of detections ranged from 0.026 to 0.237 A mu g L(-1) and the limits of quantifications from 0.094 to 0.793 A mu g L(-1). The optimised two-phase HF-LPME method was successfully applied for determination of moderately polar as well low-polar pesticides in the environmental water samples.",
journal = "Analytical and Bioanalytical Chemistry",
title = "Determination of selected pesticides in environmental water by employing liquid-phase microextraction and liquid chromatography-tandem mass spectrometry",
pages = "2243-2233",
number = "6",
volume = "397",
doi = "10.1007/s00216-010-3725-5"
}

Trtić-Petrović, T. M., Đorđević, J. S., Dujaković, N., Kumrić, K., Vasiljević, T.,& Laušević, M.. (2010). Determination of selected pesticides in environmental water by employing liquid-phase microextraction and liquid chromatography-tandem mass spectrometry. in Analytical and Bioanalytical Chemistry, 397(6), 2233-2243.
https://doi.org/10.1007/s00216-010-3725-5

Trtić-Petrović TM, Đorđević JS, Dujaković N, Kumrić K, Vasiljević T, Laušević M. Determination of selected pesticides in environmental water by employing liquid-phase microextraction and liquid chromatography-tandem mass spectrometry. in Analytical and Bioanalytical Chemistry. 2010;397(6):2233-2243.
doi:10.1007/s00216-010-3725-5 .

Trtić-Petrović, Tatjana M., Đorđević, Jelena S., Dujaković, Nikolina, Kumrić, Ksenija, Vasiljević, Tatjana, Laušević, Mila, "Determination of selected pesticides in environmental water by employing liquid-phase microextraction and liquid chromatography-tandem mass spectrometry" in Analytical and Bioanalytical Chemistry, 397, no. 6 (2010):2233-2243,
https://doi.org/10.1007/s00216-010-3725-5 . .