Abstract

Pinki Sharma and L. K. Tiwary*

The mutual interaction between 5, 5-diphenyl hydantoin sodium salt (C₁₅H₁₁N₂NaO₂) also known as dilantin sodium (DS) and surfactants like sodium dodecyl sulphate (SDS) and cetyltrimethylammonium bromide (CTAB) has been studied by measuring the variation of their aggregation properties in pressence of each other. Critical micelle concentration (CMC) of DS determined by spectrophotometric and conductivity methods in found to be 0.15 mM and this value is seen to decrease significantly in presence of SDS and CTAB. The aggregation of SDS and CTAB are also highly catalysed in presence of DS. A threefold decrease in the CMC of SDS and CTAB have been observed on varying the concentration of DS in its premicellar region. Effect of temperature on micellization of SDS and CTAB have been studied at 30o, 40° and 50° C with and without DS. Physicochemical parameters has been calculated utilizing biphasic model.

Dilantin Sodium; Critical micelle concentration; Sodium dodecyle sulphate; Cetyltrimethylammonium bromide

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