Blocking agents, carriers antigen or antibody is immobilized for a target substance, in vitro diagnostic reagents and kits comprising same, and method for detecting a target substance

摘要

PROBLEM TO BE SOLVED: To provide a blocking agent having excellent effect to reduce noises in detecting a target substance in a specimen by in vitro diagnosis, a carrier on which an antigen or an antibody against the target substance is immobilized, a reagent and a kit for in vitro diagnosis comprising said carrier, and a method for detecting the target substance.SOLUTION: The blocking agent contains a polymer having a recurring unit, the recurring unit having a sulfinyl group in its side chain.