Selective adsorption of metal cations onto AOT and dodecyl sulfate films at the air/solution interface
- 1 January 1998
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Faraday Transactions
- Vol. 94 (2) , 253-257
- https://doi.org/10.1039/a706680e
Abstract
The selective binding of alkali and alkaline earth metal cations to adsorbed films of sodium bis(2,2′)ethylhexylsulfosuccinate (AOT) and sodium dodecyl sulfate (SDS) at air/solution interfaces has been studied by ion flotation. The selectivity orders obtained for both anionic surfactant films are Li+++++ and Mg2+2+2+2+, although differences in absolute selectivities were found for the two surfactants. Selectivity was found to be determined by slight dehydration of the adsorbing ions.Keywords
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