THE PARTITIONING OF N-HEXANOL INTO MICELLES OF CETYLTRIMETHYLAMMONIUMBROMIDE IN AQUEOUS-SOLUTION - ULTRASONIC RELAXATION AND HEADSPACE ANALYSIS MEASUREMENTS

The partitioning of n-hexanol between aqueous solution and cetyltrimet hylammonium bromide micelles has been studied using head-space analysi s involving gas chromatography and ultrasonic relaxation. The study ha s been carried out over varying concentrations of hexanol up to 0.18 m ol dm-3 in both 0.05 and 0.075 mol dm-3 surfactant solutions. Over the concentration range in question the parameters that monitor the equil ibrium aspects of the partitioning process can be adequately described on the basis of a simple two-state process involving ''free'' and ''s olubilized'' hexanol. On the other hand, the kinetic parameters show m arked deviations at the higher hexanol concentrations which are close to the phase boundary.