Abstract
EMF measurements in water at 25°C have been made using surfactant ion and counterion electrodes on two homologous series of long chain surfactants, the sodium alkylsulfates (R=n-C8H17 to n-C14H29) and the alkyltrimethylammonium bromides (R=C10H21 to C16H33). The data show evidence of association below the critical micelle concentration (CMC) but not of micelle ordering due to coulombic repulsion above this concentration.
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Kale, K.M., Cussler, E.L. & Evans, D.F. Surfactant ion electrode measurements of sodium alkylsulfate and alkyltrimethylammonium bromide micellar solutions. J Solution Chem 11, 581–592 (1982). https://doi.org/10.1007/BF00649258
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DOI: https://doi.org/10.1007/BF00649258