A new electrochemically regenerated suppressor, which is based on solid-phase chemistry is described. An electrochemical process is used to regenerate the solid-phase suppressor for continuous unattended operation. Electrolysis of the detector effluent generates hydronium or hydroxide ions which automatically replace the eluent cations or anions on the suppressor. This suppressor improves and simplifies the instrumentation for suppressor-based ion chromatography.