BioChemie: Eine indische Zeitschrift
ISSN (PRINT): 0974-7427

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Application of Lee-Wheaton equation for some ionic surfactants in aqueous solution

Rabah A.Khalil*, Ahlam M.Jameel, Abdussamed M.A.Saeed


This paper reports conductmetric investigations of some ionic surfactants using Lee-Wheaton equation. Two sets of electrical conductivities of aqueous solutions of anionic sodium dodecyl sulfate (SDS), sodium dodecyl benzene sulfate (SDBS) and cationic cetyltrimethylammonium bromide (CTAB), belowand above criticalmicelle concentrations (CMC) have been measured at different temperatures. At concentrations below than CMC application of KohlrauschÂ’s model show abnormal relationships for all surfactants and application of Lee-Wheaton equation cannot proceed.While, at concentrations over CMC, Lee-Wheaton model is applicable with no logical results. It was concluded that Lee-Wheaton equation does not recognizes the formation of micelles and care should be taken for treating self assembly compounds using this equation.


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