Abstract
Liquid-liquid distribution method has been applied for the determination of the composition and stability constants of mercury species with L-cysteine /H2L/. In the pH range 2–8, mercury /II/ forms a complex Hg/HL/2 with very high stability constant /lg β2 = 40.0/, whereas methylmercury and phenylmercury form complexes CH3HgHL /lg β1 = 15.56/ and C6H5HgHL /lg β1 = 16.5/. At pH≥13, anionic complexes HgL 2−2 /lg β2 = 42.7/, CH3HgL− /lg β1 = 16.58/ and lg β1 = 17.7 are formed.
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W. Stricks, I.M. Kolthoff,J. Am. Chem. Soc., 75 /1953/ 5673.
D.J. Perkins,Biochem. J., 55 /1953/ 649.
G.R. Lenz, A.E. Martell,Biochem., 3 /1964/ 745.
J. Starý,Anal. Chim. Acta, 28 /1963/ 132.
G. Iwantscheff, Das Dithizon und seine Anwendung in der Mikro- und Spurenanalyse, Verlag Chemie, Weinheim, 1958.
J. Starý, K. Kratzer, J. Prášilová,Anal. Chim. Acta, 100 /1978/ 627.
J. Starý, J. Prášilová,Radiochem. Radioanal Lett. 26 /1976/ 33.
J. Starý, J. Prášilová,Radiochem. Radioanal. Lett., 26 /1976/ 198.
J. Starý, H. Freiser, Equilibrium Constants of Liquid-Liquid Distribution Reactions, Part IV. Chelating Extractants, Pergamon Press, Oxford, 1978.
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Starý, J., Kratzer, K. Radiometric determination of stability constants of mercury species complexes with L-cysteine. Journal of Radioanalytical and Nuclear Chemistry Letters 126, 69–75 (1988). https://doi.org/10.1007/BF02164804
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DOI: https://doi.org/10.1007/BF02164804