Comparative analysis of the transfer of alkaline and alkaline-earth cations across the water/1,2-dichloroethane interface
β Scribed by S.A. Dassie; L.M. Yudi; A.M. Baruzzi
- Publisher
- Elsevier Science
- Year
- 1995
- Tongue
- English
- Weight
- 620 KB
- Volume
- 40
- Category
- Article
- ISSN
- 0013-4686
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β¦ Synopsis
The transfer of alkaline and alkaline-earth cations across the water/l,Zdichloroethane interface in presence of l,lO-phenanthroline (phen) in the organic phase was studied using cyclic voltammetry in a concentration range wide enough to cover the following experimental conditions: C,,,(w) B C,,,(o) and C,,,(o) % C,.+(w).
The results obtained (when C,.+(w) ti C,,,,(o)) were compared with the theoretical voltammetric criteria reported by Homolka[l] for facilitated transfer. It appears that the transfer of all these cations occurs uia a facilitated mechanism. The stoichiometry of all complexes formed in the organic phase is also reported. The stability constants for Ca*+ -phen and Sr*+-phen complexes were estimated and compared with the tendency observed in the transfer potentials of these cations.
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