Patent ID: 7901573

Claim:
A separation column of a monolith type comprising: a cylindrical monolith rod formed from a porous block to take in a sample and mobile phase; a coating formed around the circumferential surface of the monolith rod; and a rod retainer disposed around the outer surface of the coating; wherein the rod retainer is formed by pressure molding an inorganic material having a melting point between 100° C. and 200° C., and further comprising a denting portion formed at an end of the column body; wherein: the denting portion is filled with the material of the coating or a material substantially equivalent in corrosion resistance to the material of the coating, the denting portion is configured not to be in direct contact with the mobile phase, and the rod retainer having a lower corrosion resistance compared with the coating does not contact the mobile phase, and the denting portion is pressed by a gasket.