Potentiometric determination of the ionization constants of ethylenediamine-N,N′-diglutaric acid at 298.15 K

Step ionization constants of ethylenediamine- N,N ′-diglutaric acid at 298.15 K and ionic strength values of 0.1, 0.5, and 1.0 (KNO 3 ) are determined by means of potentiometry. The resulting data are extrapolated to zero ionic strength using an equation with one individual parameter, and the thermodynamic ionization constants are calculated. A correlation is made between the obtained results and the corresponding data for related compounds.