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Open AccessArticle

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

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SINTERFACE Technologies, Berlin D12489, Germany
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Institute of Industrial Engineering, Kazakh National Research Technical University Named after K.I. Satpaev, Almaty 050013, Kazakhstan
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Institute of Biocolloid Chemistry, National Academy of Sciences of Ukraine, Kyiv (Kiev) 03680, Ukraine
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Institute of Colloid Chemistry and Chemistry of Water, National Academy of Sciences of Ukraine, Kyiv (Kiev) 03680, Ukraine
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MPI Colloids and Interfaces, Potsdam 14424, Germany
*
Author to whom correspondence should be addressed.
Colloids Interfaces 2018, 2(3), 28; https://doi.org/10.3390/colloids2030028
Received: 8 June 2018 / Revised: 4 July 2018 / Accepted: 11 July 2018 / Published: 15 July 2018
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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MDPI and ACS Style

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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