Patent ID: 8584869

Claim:
An absorbent having a zeta potential of −20 mV or more and having an ability to absorb granulocytes, monocytes and cytokine in blood, wherein said absorbent comprises a water-insoluble carrier having a functional group bound thereto, wherein the shape of said water-insoluble carrier is selected from the group consisting of a fiber or a hollow fiber having a fiber diameter of more than 3 μm, and a bead with a protrusion having a diameter of more than 3 μm on its surface, wherein an absorption rate for lymphocytes is 40% or less, wherein said water-insoluble carrier comprises a water-insoluble polymer having a quaternary ammonium salt and/or a straight amino group bound to a linking group selected from the group consisting of an alkyl group, an acetyl group, and an acetamidemethyl group, the quaternary ammonium salt being a group obtained by immobilizing at least one amine selected from the group consisting of N,N-dimethylhexylamine, N,N-dimethyloctylamine, and N,N-dimethyllaurylamine, and said straight amino group being obtained by immobilizing tetraethylenepentamine, and wherein a density of the quaternary ammonium salt and/or the straight amino group in said water-insoluble carrier is 0.01 to 2.0 mol per 1 mol of a repeating unit of said water-insoluble polymer.