Kinetic determination of iodide traces based on the manganese(III) metaphosphate-arsenic(III) reaction in the presence of orthophosphoric acid
Abstract
The kinetics of the iodide-catalyzed Mn(III) metaphosphate-As(III) reaction was studied in the presence of orthophosphoric acid. The reaction rate was followed spectrophotometrically at 516 nm. It was established that orthophosphoric acid increased the reaction rate and that the extent of the non-catalytic reaction was extremely small. A kinetic equation was postulated and the apparent rate constant calculated. The dependence of the reaction rate on temperature was investigated and the energy of activation and other kinetic parameters determined. Iodide was determined under the optimal experimental conditions in the range 0.6-2.5 ng.mL(-1) with a relative standard deviation of up to 6.7% and a detection limit of 0.12 ng mL(-1). The effect of foreign ions on the accuracy of the determinations was also investigated.
Keywords:
manganese(III) metaphosphate-arsenic(III) reaction / orthophosphoric acid / kinetics / iodide / kinetic determinationSource:
MICROCHIMICA ACTA, 2004, 144, 1-3, 51-56Publisher:
- Springer-Verlag Wien, Vienna
DOI: 10.1007/s00604-003-0100-7
ISSN: 1436-5073
WoS: 000188300100008
Scopus: 2-s2.0-19944371014
Collections
Institution/Community
Hemijski fakultet / Faculty of ChemistryTY - JOUR AU - Milovanović, Gordana A. AU - Pastor, Ferenc AU - Petkovic, GM AU - Todorović, Marija B. PY - 2004 UR - https://cherry.chem.bg.ac.rs/handle/123456789/563 AB - The kinetics of the iodide-catalyzed Mn(III) metaphosphate-As(III) reaction was studied in the presence of orthophosphoric acid. The reaction rate was followed spectrophotometrically at 516 nm. It was established that orthophosphoric acid increased the reaction rate and that the extent of the non-catalytic reaction was extremely small. A kinetic equation was postulated and the apparent rate constant calculated. The dependence of the reaction rate on temperature was investigated and the energy of activation and other kinetic parameters determined. Iodide was determined under the optimal experimental conditions in the range 0.6-2.5 ng.mL(-1) with a relative standard deviation of up to 6.7% and a detection limit of 0.12 ng mL(-1). The effect of foreign ions on the accuracy of the determinations was also investigated. PB - Springer-Verlag Wien, Vienna T2 - MICROCHIMICA ACTA T1 - Kinetic determination of iodide traces based on the manganese(III) metaphosphate-arsenic(III) reaction in the presence of orthophosphoric acid VL - 144 IS - 1-3 SP - 51 EP - 56 DO - 10.1007/s00604-003-0100-7 ER -
@article{ author = "Milovanović, Gordana A. and Pastor, Ferenc and Petkovic, GM and Todorović, Marija B.", year = "2004", abstract = "The kinetics of the iodide-catalyzed Mn(III) metaphosphate-As(III) reaction was studied in the presence of orthophosphoric acid. The reaction rate was followed spectrophotometrically at 516 nm. It was established that orthophosphoric acid increased the reaction rate and that the extent of the non-catalytic reaction was extremely small. A kinetic equation was postulated and the apparent rate constant calculated. The dependence of the reaction rate on temperature was investigated and the energy of activation and other kinetic parameters determined. Iodide was determined under the optimal experimental conditions in the range 0.6-2.5 ng.mL(-1) with a relative standard deviation of up to 6.7% and a detection limit of 0.12 ng mL(-1). The effect of foreign ions on the accuracy of the determinations was also investigated.", publisher = "Springer-Verlag Wien, Vienna", journal = "MICROCHIMICA ACTA", title = "Kinetic determination of iodide traces based on the manganese(III) metaphosphate-arsenic(III) reaction in the presence of orthophosphoric acid", volume = "144", number = "1-3", pages = "51-56", doi = "10.1007/s00604-003-0100-7" }
Milovanović, G. A., Pastor, F., Petkovic, G.,& Todorović, M. B.. (2004). Kinetic determination of iodide traces based on the manganese(III) metaphosphate-arsenic(III) reaction in the presence of orthophosphoric acid. in MICROCHIMICA ACTA Springer-Verlag Wien, Vienna., 144(1-3), 51-56. https://doi.org/10.1007/s00604-003-0100-7
Milovanović GA, Pastor F, Petkovic G, Todorović MB. Kinetic determination of iodide traces based on the manganese(III) metaphosphate-arsenic(III) reaction in the presence of orthophosphoric acid. in MICROCHIMICA ACTA. 2004;144(1-3):51-56. doi:10.1007/s00604-003-0100-7 .
Milovanović, Gordana A., Pastor, Ferenc, Petkovic, GM, Todorović, Marija B., "Kinetic determination of iodide traces based on the manganese(III) metaphosphate-arsenic(III) reaction in the presence of orthophosphoric acid" in MICROCHIMICA ACTA, 144, no. 1-3 (2004):51-56, https://doi.org/10.1007/s00604-003-0100-7 . .