Протолитические свойства диоксанлигнина ели в смесях воды с ацетонитрилом

The pKa values of the three types of phenolic structural fragments of fir Dioxanlignin in the mixtures of water with acetonitrile in the solvent composition range 0-90% are determined by UV-spectrophotometric potentiometric titration method. Using the linear solvation energy relationship (LSER) concept the contributions of different solutesolvent interactions into the acidity alteration are calculated.