Collect. Czech. Chem. Commun. 1992, 57, 296-302

The Interaction of Azure B with Surfactants

Irena Němcová and Martina Dušková

Department of Analytical Chemistry, Charles University, 128 40 Prague 2


A study was made of the effect of anionogenic, cationogenic and nonionogenic surfactants (tensides) on the absorption spectra of azure B. It was found that the change in the absorption spectra in solutions containing sodium lauryl sulfate are produced by change in the polymerization of the dye. At low tenside concentrations, dimers and higher dye aggregates are formed as a result of a decrease in the dye cation repulsion caused by interaction with tenside monomer anions. Above the critical micelle concentration, the dye is solubilized in the micelles, where the monomer form of azure B predominates. The cationogenic tenside does not affect dye polymerization; monomer formation is preferred in the nonionogenic tenside after micelle formation.