Direct determination of the distribution coefficient of tridecyl dimethyl 
phosphine oxide between water and hexane

Fainerman, Valentin B.; Sharipova, Altynay A.; Aidarova, Saule B.; Kovalchuk, Volodymyr I.; Aksenenko, Eugene V.; Makievski, Alexander V.; Miller, Reinhard

doi:10.3390/colloids2030028

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Direct determination of the distribution coefficient of tridecyl dimethyl phosphine oxide between water and hexane

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Miller, Reinhard
Reinhard Miller, Biomaterialien, Max Planck Institute of Colloids and Interfaces, Max Planck Society;

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引用

Fainerman, V. B., Sharipova, A. A., Aidarova, S. B., Kovalchuk, V. I., Aksenenko, E. V., Makievski, A. V., & Miller, R. (2018). Direct determination of the distribution coefficient of tridecyl dimethyl phosphine oxide between water and hexane. Colloids and Interfaces, 2(3):. doi:10.3390/colloids2030028.

引用: https://hdl.handle.net/21.11116/0000-0002-5301-F

要旨

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.