Porous adsorbent for adsorbing low density lipoproteins

Claim 1

A porous adsorbent for adsorbing thereonto a low density lipoprotein: which comprises a carrier surface and, linked with the surface, at least one member selected from a silanol group and a synthetic polyanion member having a chain structure and a molecular weight of 600 or more, said synthetic polyanion member having at least one functional group selected from the group consisting of a carboxyl group, sulfonic group and phosphoric acid group, said adsorbent satisfying at least one requirement selected from the group consisting of such requirement that the silanol group is present on the surface at a density of 0.8 to 7.5 μmol/m 2 and such requirement that the amount of the negative charge of the synthetic polyanion member relative to that of the adsorbent is 1×10 -6 to 1×10 -3 equivalent per ml of the adsorbent; and which has pores, the pore diameters of pores occupying 70% or more of pore volume based on the total pore volume of the adsorbent being distributed in the range of 20 nm to 1,250 nm, the pore volume of pores of a pore diameter in the range of 0.8 D to 1.2 D in which D represents the pore diameter of any one of pores having pore diameters in the range of 20 nm to 1,250 nm being less than 80% based on the total pore volume of the adsorbent.