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Effects on the micellar Solubilization of Organic Compounds by Surfactant Micelles : II. Nature and Position of Substituent Groups in Aromatic Acids

Higazy W., Mahmoud F.

Polish Journal of Chemistry

1999

Vol. 73, nr 9

1555-1562

The semiequilibrium dialysis method has been used to determine the quilibrium of solubilization of o-, m- and p-toluic acids in micelles of the cationic surfactant 1-hexadecylpyridinium chloride (CPC) in 0.1 M HCl, in a range of concentrations of the toluic acids and surfactant. Apparent solubilization constants, K, of the neutral acids have been correlated with mole fractions XA of the acid in the micelle.