A technique for measuring interfacial concentrations of surfactants at the oil-water interface
- 1 August 1975
- journal article
- Published by IOP Publishing in Journal of Physics E: Scientific Instruments
- Vol. 8 (8) , 696-699
- https://doi.org/10.1088/0022-3735/8/8/023
Abstract
A technique has been developed for directly measuring the amount of surfactant, which is suitably labelled with a 14C atom, adsorbed at an oil-water interface. The technique entails using an oil-soluble, non-surface-active scintillant and a photomultiplier. The number of pulses detected is proportional to the 14C surfactant concentration at the interface and after suitable calibration this can be transformed into the surface concentration. As an example, the technique is used to measure the adsorption isotherm for cetyl-1-14C-trimethylammonium bromide at the toluene-water interface.Keywords
This publication has 13 references indexed in Scilit:
- Comparison of spread monolayers and adsorbed monolayers at an n-heptane/aqueous sodium chloride interfaceTransactions of the Faraday Society, 1965
- The Adsorption of Tritiated Sodium Dodecyl Sulfate at the Solution Surface Measured with a Windowless, High Humidity Gas Flow Proportional CounterThe Journal of Physical Chemistry, 1957
- The Radioactive Measurement of the Adsorption of Dissolved Substances on Liquid Surfaces and an Application to “Impurities” in Dodecyl Sodium Sulfate Solutions.The Journal of Physical Chemistry, 1951
- Determination and Significance of Polarographic Critical Micelle ConcentrationsJournal of the American Chemical Society, 1950
- A Radioactive Method for Measuring the Adsorption of Dissolved Substances on Liquid SurfacesNature, 1950
- A note on the direct determination of adsorption from solutionJournal of Colloid Science, 1949
- Measurement of the Adsorption of Surface-Active Agent at a Solution – Air Interface by a Radiotracer MethodNature, 1949
- Adsorption of lauryl sulphonic acid in the surface of its aqueous solution, and the Gibbs theoremProceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences, 1940
- The interferometer method for measuring absolute adsorption in the surface of solutionsTransactions of the Faraday Society, 1940
- Measurements of adsorption at the air-water interface by the microtome methodProceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences, 1936