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Colloids Interfaces 2018, 2(3), 28; https://doi.org/10.3390/colloids2030028

Direct Determination of the Distribution Coefficient of Tridecyl Dimethyl Phosphine Oxide between Water and Hexane

1
SINTERFACE Technologies, Berlin D12489, Germany
2
Institute of Industrial Engineering, Kazakh National Research Technical University Named after K.I. Satpaev, Almaty 050013, Kazakhstan
3
Institute of Biocolloid Chemistry, National Academy of Sciences of Ukraine, Kyiv (Kiev) 03680, Ukraine
4
Institute of Colloid Chemistry and Chemistry of Water, National Academy of Sciences of Ukraine, Kyiv (Kiev) 03680, Ukraine
5
MPI Colloids and Interfaces, Potsdam 14424, Germany
*
Author to whom correspondence should be addressed.
Received: 8 June 2018 / Revised: 4 July 2018 / Accepted: 11 July 2018 / Published: 15 July 2018
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Abstract

Drop profile analysis tensiometry is applied to determine the distribution coefficient of a nonionic surfactant for a water/hexane system. The basic idea is to measure the interfacial tension isotherm in two configurations: a hexane drop immersed in the surfactant aqueous solutions at different bulk concentrations, and a water drop immersed into a hexane solution of the same surfactant. Both types of experiments lead to an isotherm for the equilibrium interfacial tensions with the same slope but with a concentration shift between them. This shift refers exactly to the value of the distribution coefficient. View Full-Text
Keywords: adsorption kinetics; nonionic surfactant; diffusion-controlled adsorption; water-oil interface; distribution coefficient; surfactant partitioning; drop profile analysis tensiometry adsorption kinetics; nonionic surfactant; diffusion-controlled adsorption; water-oil interface; distribution coefficient; surfactant partitioning; drop profile analysis tensiometry
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Fainerman, V.B.; Sharipova, A.A.; Aidarova, S.B.; Kovalchuk, V.I.; Aksenenko, E.V.; Makievski, A.V.; Miller, R. Direct Determination of the Distribution Coefficient of Tridecyl Dimethyl Phosphine Oxide between Water and Hexane. Colloids Interfaces 2018, 2, 28.

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