Speciation of trialkyltin (IV) cations in natural fluids

Antonio Gianguzza, Frank J. Millero, Claudia Foti, Demetrio Milea, Silvio Sammartano, Claudia Foti, Sergio Sammartano

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The hydrolysis of (CH(3))(3)Sn(+), (C(2)H(5))(3)Sn(+) and (C(3)H(7))(3)Sn(+) has been studied in a Synthetic Seawater (SSW) ionic medium simulating the major composition of natural seawater, at different salinities (5 less than or equal to S less than or equal to 45), and at t = 25 degreesC. Interactions with anionic components of SSW, considered as single sea salt, are determined by means of a complex formation model. By potentiometric measurements (ISE-H(+) and ISE-F(-) electrodes), the model has been extended to also consider interactions of organotins with carbonate and fluoride ions, which are other important components of seawater. Literature and new values of hydrolysis constants in different ionic media (NaNO(3), NaCl, Na(2)SO(4) and SSW) are used to determine Pitzer interaction parameters. Predictive equations for the calculation of unknown hydrolysis constants and Pitzer interaction parameters of other trialkyltin(IV) cations, such as tributyltin(IV), are proposed.
Lingua originaleEnglish
pagine (da-a)157-167
Numero di pagine11
RivistaMarine Chemistry
Stato di pubblicazionePublished - 2004


All Science Journal Classification (ASJC) codes

  • Oceanography
  • Chemistry(all)
  • Environmental Chemistry
  • Water Science and Technology

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Gianguzza, A., Millero, F. J., Foti, C., Milea, D., Sammartano, S., Foti, C., & Sammartano, S. (2004). Speciation of trialkyltin (IV) cations in natural fluids. Marine Chemistry, 85, 157-167.