Measurement of the Dissociation Constants of some Carboxy Azo Dyes and their Comparison with Values Obtained from A--pH Curves

Vladimír Kubíček (kubicek@faf.cuni.cz)

Department of Biophysics and Physical Chemistry, Charles University in Prague, Faculty of Pharmacy in Hradec Králové, Czech Republic

Summary

The pK values of some carboxy azo dyes measured by spectrophotometric method were compared with the pK values of the same dyes estimated from A—pH curves. Very good agreement of the measured and the estimated values was reached for the most of the dyes.