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RESEARCH PRODUCT

Speciation of trialkyltin(IV) cations in natural fluids

Demetrio MileaFrank J. MilleroSilvio SammartanoAntonio GianguzzaClaudia Foti

subject

chemistry.chemical_classificationfood.ingredientChemistryHydrolysisSea saltmedia_common.quotation_subjectInorganic chemistryIonic bondingArtificial seawaterSalt (chemistry)General ChemistryOceanographytrialkyltin(IV)SpeciationHydrolysisfoodIonic strengthEnvironmental ChemistrySeawaterIonic strength Protonation protonation constantsHydrolysis; trialkyltin(IV); Natural FluidsNatural FluidsWater Science and Technologymedia_common

description

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.

yearjournalcountryeditionlanguage
2004-01-01Marine Chemistry
https://doi.org/10.1016/j.marchem.2003.10.004