Application of Isotachophoresis for Determination of Anionic Forms of Phosphonic Acids

• Autorzy: Górecki H. , Szczygieł B , Drela I.
• Języki publikacji: EN

Abstrakty

EN

Using a capillary electrophoresis analyser, the concentrations of anionic forms of 2-phosphonobutane-1,2,4-tricarboxylic acid (PBTC) and N-trismethylenephosphonic acid (NTMP) were determined by the isotachophoresis method. The measurements were performed at pH = 4.2, 6.0 and 8.0. In each case the proper leading/terminating electrolyte system was selected on the basis of literature and authors'own research. The results of isotachophoretic analyses were found to be in good agreement with the results derived from dissociation constants determined by potentiometric method. Considerable difficulties were encountered in interpretation of the results obtained for pH = 8.0 since individual steps in the isotachopherograms were fuzzy and distorted probably due to incomplete separation of the analysed sample into zones. Knowledge of the kind and concentration of ligand forms of chelating compounds, to which PBTC and NTMP belong, can be useful for reclamation of soils polluted with heavy metals.

Słowa kluczowe

EN

capillary electrophoresis; isotachopherogram; phosphonic acids; stability constants; species distribution

• Wydawca: Polskie Towarzystwo Chemiczne
• Czasopismo: Polish Journal of Chemistry
• Rocznik: 2004
• Tom: Vol. 78 / nr 9
• Strony: 1691--1702
• Opis fizyczny: Bibliogr. 11 poz., rys.

Twórcy

autor

Górecki H.

• Institute of Inorganic Technology and Mineral Fertilizers, Department of Chemistry, Wrocław University of Technology, Wyb. St. Wyspianskiego 27, 50-370 Wrocław, Poland

autor

Szczygieł B

• Institute of Inorganic Technology and Mineral Fertilizers, Department of Chemistry, Wrocław University of Technology, Wyb. St. Wyspianskiego 27, 50-370 Wrocław, Poland

autor

Drela I.

• Institute of Inorganic Technology and Mineral Fertilizers, Department of Chemistry, Wrocław University of Technology, Wyb. St. Wyspianskiego 27, 50-370 Wrocław, Poland

Bibliografia

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• 8. Szczygieł B., An evaluation of isotachophoresis as a mean for rapid determination of usefulness organophosphorus ligands for removal heavy metals from soils by electrokinetics. Chemistry for Agri culture, vol. 4, p. 622-627, Czech-Pol Trade, Prague, 2002.
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