TY  - JOUR
AU  - Todorović, Žaklina N.
AU  - Radulović, Jelena M.
AU  - Sredović Ignjatović, Ivana D.
AU  - Ignjatović, Ljubiša M.
AU  - Onjia, Antonije E.
PY  - 2021
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/5924
AB  - Seventeen water-soluble substances (of sodium, ammonium, potassium, magnesium, calcium, formate, methanesulfonate, glyoxylate, chloride, nitrite, nitrate, glutarate, succinate, malate, malonate, sulfate and oxalate) in 94 samples of particle matter in the ambient air, collected over ten months, in a suburb of Belgrade (Serbia), were determined by ion chromatography. To apportion the sources of the air pollution, the log-transformed data were processed by applying multivariate techniques. Principal component and factor analysis identified three main factors controlling the data variability: stationary combustion processes with the highest loadings of oxalate, malonate and malate; landfill emission and secondary inorganic aerosol characterized by high levels of ammonium, nitrate and sulfate; a contribution of mineral dust composed of magnesium, calcium and chloride. The hierarchical cluster analysis pointed out a differentiation of the samples into five groups belonging to different variables inputs. For the classification of ambient air samples using nine selected ions, the recognition ability of linear discriminant analysis, k-nearest neighbors, and soft independent modeling of class analogy were 87.0, 94.6, and 97.8 %, respectively. Time-series analysis showed that the traffic emission is more pronounced in winter in contrast to the mineral dust influence, while the effect of waste combustion exhibits no trend.
PB  - Serbian Chemical Society
T2  - Journal of the Serbian Chemical Society
T1  - Ambient air particles: The use of ion chromatography and multivariate techniques in the analysis of water-soluble substances
EP  - 766
IS  - 7-8
SP  - 753
VL  - 86
DO  - 10.2298/JSC200826077T
ER  - 

@article{
author = "Todorović, Žaklina N. and Radulović, Jelena M. and Sredović Ignjatović, Ivana D. and Ignjatović, Ljubiša M. and Onjia, Antonije E.",
year = "2021",
abstract = "Seventeen water-soluble substances (of sodium, ammonium, potassium, magnesium, calcium, formate, methanesulfonate, glyoxylate, chloride, nitrite, nitrate, glutarate, succinate, malate, malonate, sulfate and oxalate) in 94 samples of particle matter in the ambient air, collected over ten months, in a suburb of Belgrade (Serbia), were determined by ion chromatography. To apportion the sources of the air pollution, the log-transformed data were processed by applying multivariate techniques. Principal component and factor analysis identified three main factors controlling the data variability: stationary combustion processes with the highest loadings of oxalate, malonate and malate; landfill emission and secondary inorganic aerosol characterized by high levels of ammonium, nitrate and sulfate; a contribution of mineral dust composed of magnesium, calcium and chloride. The hierarchical cluster analysis pointed out a differentiation of the samples into five groups belonging to different variables inputs. For the classification of ambient air samples using nine selected ions, the recognition ability of linear discriminant analysis, k-nearest neighbors, and soft independent modeling of class analogy were 87.0, 94.6, and 97.8 %, respectively. Time-series analysis showed that the traffic emission is more pronounced in winter in contrast to the mineral dust influence, while the effect of waste combustion exhibits no trend.",
publisher = "Serbian Chemical Society",
journal = "Journal of the Serbian Chemical Society",
title = "Ambient air particles: The use of ion chromatography and multivariate techniques in the analysis of water-soluble substances",
pages = "766-753",
number = "7-8",
volume = "86",
doi = "10.2298/JSC200826077T"
}

Todorović, Ž. N., Radulović, J. M., Sredović Ignjatović, I. D., Ignjatović, L. M.,& Onjia, A. E.. (2021). Ambient air particles: The use of ion chromatography and multivariate techniques in the analysis of water-soluble substances. in Journal of the Serbian Chemical Society
Serbian Chemical Society., 86(7-8), 753-766.
https://doi.org/10.2298/JSC200826077T

Todorović ŽN, Radulović JM, Sredović Ignjatović ID, Ignjatović LM, Onjia AE. Ambient air particles: The use of ion chromatography and multivariate techniques in the analysis of water-soluble substances. in Journal of the Serbian Chemical Society. 2021;86(7-8):753-766.
doi:10.2298/JSC200826077T .

Todorović, Žaklina N., Radulović, Jelena M., Sredović Ignjatović, Ivana D., Ignjatović, Ljubiša M., Onjia, Antonije E., "Ambient air particles: The use of ion chromatography and multivariate techniques in the analysis of water-soluble substances" in Journal of the Serbian Chemical Society, 86, no. 7-8 (2021):753-766,
https://doi.org/10.2298/JSC200826077T . .

TY  - JOUR
AU  - Ignjatović, Ljubiša M.
AU  - Sredović-Ignjatović, Ivana
PY  - 2015
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/3855
AB  - The reduction of the greenhouse gas emissions and the assessment of renewable energy sources are among today’s most challenging tasks. In this context biofuels have emerged as promising alternatives. Successful commercialization and market acceptance of biofuels are dependent on the presence of ions that induce negative impact on the vehicle components and on the environment. In this context ion chromatography (IC) plays a decisive role. Besides the quantitation of cations, glycerol and antioxidants in biodiesel, a direct-injection IC method allows the determination of the chloride and sulfate content in bioethanol and has become an invaluable tool for the process control and monitoring of biogas reactor samples. This work provides an use of IC methods combined with inline sample preparation for the determination of anions and cations in organic biofuels and volatile organic acids in process solutions: Traces of anions in a gasoline/ethanol blend can be determined in the ppb range after matrix elimination; Alkali metals and water-extractable alkaline earth metals in biodiesel are determined after extraction with nitric acid and subsequent dialysis; In biogas reactor samples, low-molecular-weight organic acids stem from the biodegradation of organic matter can be determined applying ion exclusion chromatography after dialysis or ultrafiltration.
PB  - University of East Sarajevo, Faculty of Technology
T2  - Journal of Engineering & Processing Management
T1  - Ion-chromatographic determination of ions in biodiesel, bioethanol and biogas
EP  - 124
IS  - 1
SP  - 115
VL  - 7
UR  - https://hdl.handle.net/21.15107/rcub_agrospace_3855
ER  - 

@article{
author = "Ignjatović, Ljubiša M. and Sredović-Ignjatović, Ivana",
year = "2015",
abstract = "The reduction of the greenhouse gas emissions and the assessment of renewable energy sources are among today’s most challenging tasks. In this context biofuels have emerged as promising alternatives. Successful commercialization and market acceptance of biofuels are dependent on the presence of ions that induce negative impact on the vehicle components and on the environment. In this context ion chromatography (IC) plays a decisive role. Besides the quantitation of cations, glycerol and antioxidants in biodiesel, a direct-injection IC method allows the determination of the chloride and sulfate content in bioethanol and has become an invaluable tool for the process control and monitoring of biogas reactor samples. This work provides an use of IC methods combined with inline sample preparation for the determination of anions and cations in organic biofuels and volatile organic acids in process solutions: Traces of anions in a gasoline/ethanol blend can be determined in the ppb range after matrix elimination; Alkali metals and water-extractable alkaline earth metals in biodiesel are determined after extraction with nitric acid and subsequent dialysis; In biogas reactor samples, low-molecular-weight organic acids stem from the biodegradation of organic matter can be determined applying ion exclusion chromatography after dialysis or ultrafiltration.",
publisher = "University of East Sarajevo, Faculty of Technology",
journal = "Journal of Engineering & Processing Management",
title = "Ion-chromatographic determination of ions in biodiesel, bioethanol and biogas",
pages = "124-115",
number = "1",
volume = "7",
url = "https://hdl.handle.net/21.15107/rcub_agrospace_3855"
}

Ignjatović, L. M.,& Sredović-Ignjatović, I.. (2015). Ion-chromatographic determination of ions in biodiesel, bioethanol and biogas. in Journal of Engineering & Processing Management
University of East Sarajevo, Faculty of Technology., 7(1), 115-124.
https://hdl.handle.net/21.15107/rcub_agrospace_3855

Ignjatović LM, Sredović-Ignjatović I. Ion-chromatographic determination of ions in biodiesel, bioethanol and biogas. in Journal of Engineering & Processing Management. 2015;7(1):115-124.
https://hdl.handle.net/21.15107/rcub_agrospace_3855 .

Ignjatović, Ljubiša M., Sredović-Ignjatović, Ivana, "Ion-chromatographic determination of ions in biodiesel, bioethanol and biogas" in Journal of Engineering & Processing Management, 7, no. 1 (2015):115-124,
https://hdl.handle.net/21.15107/rcub_agrospace_3855 .