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Radiometric determination of stability constants of mercury species complexes with L-cysteine

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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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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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Keywords

  • Physical Chemistry
  • Mercury
  • Inorganic Chemistry
  • Form Complex
  • High Stability