Measurement value lowering inhibitor for immunoassay method and immunoassay method using the same

摘要

A measurement value lowering inhibitor for immunoassay method that is capable of enhancing the accuracy of immunoassay method through suppressing of any influences of interfering substances existing in an analyte sample; and using the inhibitor, an immunoassay method in which any measurement value lowering by interfering substances is suppressed and a reagent for immunoassay method. The measurement value lowering inhibitor for immunoassay method used to suppress any measurement value lowering by interfering substances is comprised of an ionic surfactant consisting of a polymer obtained by polymerization of a hydrophobic cyclic monomer having an ionic functional group, which has a molecular weight of 1000 to 10×104.