Crystal Violet Partitioning in Anionic Surfactants Micellar Media: UV-Visible Spectroscopy Study

Abstract

Simple and differential Uv/Visible spectroscopic method were used to monitored the interaction of Sodium dodecyl sulphate (SDS) and Sodium – N- laouryl sarcosinate (SLS) with crystal violet (CV) in pre-micellar and post-micellar concentration range. The results showed that the peak of CV at 590nm was unperturbed in CV/SDS system, but the intensity increased as surfactant concentration increased, unlike in the CV/SLS system. This is an indication that strong interaction occurred between CV and surfactants molecule. Absorption data were also used to obtain partition coefficient () values and binding constant () values from which the free energy of partition () and the free energy of binding () were estimated. From the partition coefficient () values, it could be inferred that the solubilization of CV is more pronounced and spontaneous in the SDS than in the SLS micellar media.