SEARCH Articles Figures Tables Effect of reference electrode on potassium determination. Single measurements in NaCl or KCl with reference electrode against a 3 M KCl agar bridge 2 mm in diameter, upper lines, and with liquid ion-exchanger electrode against the reference electrode, lower lines. The reference electrode was filled with a solution of 3 M lithium acetate with or without addition of agar 2 g 100 ml. [Publishers Imprint]