Abstract: In the present paper,we suggest a equation to describe the coefficients K_ij^pot of the liquid ion-exchanger membrane anion-selective electrodes and the interfering anion constructional parameters(z/r²)_j .With the equation, more than forty electrode's data are treated.The results show that there is a good correlation between K_ij^pot of the electrodes and (2/r²)_j of the anions.