Experimental Design Optimization of the Determination of Total Halogens in Coal by Combustion-Ion Chromatography
Authors
Sredović-Ignjatović, Ivana
Onjia, Antonije E.

Ignjatović, Ljubiša M.

Todorović, Zaklina N.

Rajaković, Ljubinka V.
Article (Accepted Version)
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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 methodologySource:
Analytical Letters, 2015, 48, 16, 2597-2612Publisher:
- Taylor & Francis Inc, Philadelphia
Funding / projects:
Note:
- 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
DOI: 10.1080/00032719.2015.1041029
ISSN: 0003-2719
WoS: 000360295100007
Scopus: 2-s2.0-84939218378
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Poljoprivredni fakultetTY - 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 . .