Elimination of prozone phenomenon in immunoassay reagents

摘要

An object is to provide an immunochromatography detection method and an immunochromatography kit in which a prozone phenomenon occurring in a sandwich method when using an analyte in which an antigen is present in a large excess amount is suppressed/excluded. The object was achieved by retaining a nonionic and hydrophilic surfactant having an HLB value of 14 to 18 in a sample addition part of an immunochromatography device, and also using a membrane having a fast flow speed as a membrane to be used for a chromatography medium.