Collect. Czech. Chem. Commun. 1991, 56, 2100-2106

The interactions of tensides with calconalide I

Irena Němcováa, Oldřich Valclb and Jiří Makovičkac

a Department of Analytical Chemistry, Charles University, 128 40 Prague 2
b State Veterinary Institute, 463 11 Liberec 30
c Computer Laboratory, Charles University, 128 40 Prague 2


A study was made of the effect of cationogenic, anionogenic and nonionogenic tensides on the absorption spectra and dissociation constant of calconalide I. It was found that the changes in the absorption spectra are a result of influences on the dissociation of the dye and a shift in the equilibrium between the tautomeric forms. The mechanism of the effect of the tenside on dye dissociation was also discussed.