THE LIQUID-JUNCTION POTENTIAL ON THE DIAP HRAGM OF REFERENCE ELECTRODES

The electrolyte solution flow through porous ceramic diaphragms is use d for evaluating measurements of streaming potentials. With porous mag nesia silicate diaphragms, by salt concentrations from 1 x 10(-5) to 1 M KCl, the values of zeta potentials are negative. Increases in salt concentrations lower the zeta potentials through a decrease in double layer thickness. In presence of concentrated salt solutions the stream ing potential has a very small effect on liquid junction potential of reference electrodes.