Determination of total halogens in coal was investigated with oxygen bomb combustion followed by ion chromatography. Experimental parameters were optimized by fractional factorial design and response surface methodology. Fractional factorial design was employed in screening experiments to evaluate the influence of the oxygen pressure, catalyst, absorption solution, reduction reagent, bomb cooling time, and a combustion aid on the combustion of coal in an oxygen bomb. Response surface methodology was conducted to further refine the results obtained by fractional factorial design and to define parameters for the procedure. The accuracy and precision of combustion with ion chromatography were evaluated by the use of two certified reference materials and by fortified in-house coal standards. The limits of detection and quantification for total halogens were 0.84 and 2.80 milligrams per kilogram, respectively, for 500 milligram samples. Ion chromatography provided relative standard deviatio...ns less than 4 percent, recoveries exceeding 95 percent, and was convenient. This method is recommended for routine determination of total halogens in coal because of its reliability.
Keywords:
Total coal halogens / Fractional factorial design / Ion chromatography / Combustion / Response surface methodology
This is peer-reviewed version of the following article: Sredović-Ignjatović, I.; Onjia, A. E.; Ignjatović, L. M.; Todorović, Z. N.; Rajaković, L. V. Experimental Design Optimization of the Determination of Total Halogens in Coal by Combustion-Ion Chromatography. Analytical Letters 2015, 48 (16), 2597–2612. https://doi.org/10.1080/00032719.2015.1041029
TY - JOUR
AU - Sredović-Ignjatović, Ivana
AU - Onjia, Antonije E.
AU - Ignjatović, Ljubiša M.
AU - Todorović, Zaklina N.
AU - Rajaković, Ljubinka V.
PY - 2015
UR - http://aspace.agrif.bg.ac.rs/handle/123456789/5764
AB - Determination of total halogens in coal was investigated with oxygen bomb combustion followed by ion chromatography. Experimental parameters were optimized by fractional factorial design and response surface methodology. Fractional factorial design was employed in screening experiments to evaluate the influence of the oxygen pressure, catalyst, absorption solution, reduction reagent, bomb cooling time, and a combustion aid on the combustion of coal in an oxygen bomb. Response surface methodology was conducted to further refine the results obtained by fractional factorial design and to define parameters for the procedure. The accuracy and precision of combustion with ion chromatography were evaluated by the use of two certified reference materials and by fortified in-house coal standards. The limits of detection and quantification for total halogens were 0.84 and 2.80 milligrams per kilogram, respectively, for 500 milligram samples. Ion chromatography provided relative standard deviations less than 4 percent, recoveries exceeding 95 percent, and was convenient. This method is recommended for routine determination of total halogens in coal because of its reliability.
PB - Taylor & Francis Inc, Philadelphia
T2 - Analytical Letters
T1 - Experimental Design Optimization of the Determination of Total Halogens in Coal by Combustion-Ion Chromatography
EP - 2612
IS - 16
SP - 2597
VL - 48
DO - 10.1080/00032719.2015.1041029
ER -
@article{
author = "Sredović-Ignjatović, Ivana and Onjia, Antonije E. and Ignjatović, Ljubiša M. and Todorović, Zaklina N. and Rajaković, Ljubinka V.",
year = "2015",
abstract = "Determination of total halogens in coal was investigated with oxygen bomb combustion followed by ion chromatography. Experimental parameters were optimized by fractional factorial design and response surface methodology. Fractional factorial design was employed in screening experiments to evaluate the influence of the oxygen pressure, catalyst, absorption solution, reduction reagent, bomb cooling time, and a combustion aid on the combustion of coal in an oxygen bomb. Response surface methodology was conducted to further refine the results obtained by fractional factorial design and to define parameters for the procedure. The accuracy and precision of combustion with ion chromatography were evaluated by the use of two certified reference materials and by fortified in-house coal standards. The limits of detection and quantification for total halogens were 0.84 and 2.80 milligrams per kilogram, respectively, for 500 milligram samples. Ion chromatography provided relative standard deviations less than 4 percent, recoveries exceeding 95 percent, and was convenient. This method is recommended for routine determination of total halogens in coal because of its reliability.",
publisher = "Taylor & Francis Inc, Philadelphia",
journal = "Analytical Letters",
title = "Experimental Design Optimization of the Determination of Total Halogens in Coal by Combustion-Ion Chromatography",
pages = "2612-2597",
number = "16",
volume = "48",
doi = "10.1080/00032719.2015.1041029"
}
Sredović-Ignjatović, I., Onjia, A. E., Ignjatović, L. M., Todorović, Z. N.,& Rajaković, L. V.. (2015). Experimental Design Optimization of the Determination of Total Halogens in Coal by Combustion-Ion Chromatography. in Analytical Letters
Taylor & Francis Inc, Philadelphia., 48(16), 2597-2612.
https://doi.org/10.1080/00032719.2015.1041029
Sredović-Ignjatović I, Onjia AE, Ignjatović LM, Todorović ZN, Rajaković LV. Experimental Design Optimization of the Determination of Total Halogens in Coal by Combustion-Ion Chromatography. in Analytical Letters. 2015;48(16):2597-2612.
doi:10.1080/00032719.2015.1041029 .
Sredović-Ignjatović, Ivana, Onjia, Antonije E., Ignjatović, Ljubiša M., Todorović, Zaklina N., Rajaković, Ljubinka V., "Experimental Design Optimization of the Determination of Total Halogens in Coal by Combustion-Ion Chromatography" in Analytical Letters, 48, no. 16 (2015):2597-2612,
https://doi.org/10.1080/00032719.2015.1041029 . .
