Study of the temperature behaviour of all-solid-state nonactin ammonium electrodes with PVC membrane applied to graphite–epoxy supports of varied composition

A study of the effect of the temperature on the response of all-solid-state ammonium selective electrodes prepared by casting PVC membranes with nonactin on supports of graphite-epoxy composites containing a variable amount of graphite up to 60% is presented. It is shown that while supports made of composites with 30% or less of graphite provide no adequate response characteristics, the variation of the percentage of graphite between 40 and 60% has no influence neither on the slope and standard potential temperature coefficients of the electrodes, nor on their isopotential point concentrations. The temperature hysteresis of the electrodes was found to be limited and also independent of the amount of graphite in the composite.