Iontophoretic electrode with solution containment system

A solution containment system for use in connection with an iontophoretic bioelectrode having a solution containing receptacle. The solution containment system includes a nipple (12) formed in the wall (4) of the receptacle, a capsule disposed in the nipple (12), and a liquid absorbing material contained in the capsule. The capsule is burstable when squeezed so that the liquid absorbing material is released into the interior of the receptacle to absorb any solution left over from use of the bioelectrode.