Patent ID: 8425842

Claim:
A suppressor for suppressing a background electrical conductivity of an eluate discharged from a separation column of an ion analyzer, the suppressor comprising: an ion-exchange membrane; an eluate channel being in contact with one side of the ion-exchange membrane, the eluate channel serving as a channel through which an eluate discharged from the separation column flows, and having inside no obstacle to the flow; a regenerant channel being in contact with the other side of the ion-exchange membrane, the regenerant channel serving as a channel through which a regenerant for regenerating ionic functional groups of the ion-exchange membrane flows, having been disposed so as to have no region opposed to the eluate channel and extending in parallel to the eluate channel in such a nearby position that the ionic functional groups can move to the eluate channel through the ion-exchange membrane, and having inside no obstacle to the flow; and an ion-exchange membrane support member being in contact with at least a region being opposed to the regenerant channel on the one side of the ion-exchange membrane and a region being opposed to the eluate channel on the other side of the ion-exchange membrane, to support the ion-exchange membrane with wall surfaces.