The silver/sulfide ISE uses a silver/sulfide pellet. The pellet is practically insoluble in the test solutions being measured and produces a potential change due to changes in the sample’s ion activity. When the ionic strength of the sample is fixed by the addition of ISA, the voltage is proportional to the concentration of silver ions in solution and the electrode follows the Nernst equation.
The silver ISE is available as either a combination design that is complete with a reference cell or a half-cell that is used with a reference electrode. The ISE is a convenient way to measure silver.