【Detection principle】 This product uses fluorescence immunochromatography to detect antigen in serum and plasma.Basic principle: there are t and C lines on the nitrocellulose membrane, and the Tline is coated with antibody A which can specifically recognize CHW antigen.The binding pad is sprayed with another fluorescent nanomaterial labeled antibody B which can specifically recognize CHW. The target detection object in the sample first combines with the antibody B labeled with the nanomaterial to form a complex, and then upward chromatography is carried out. The complex combines with T-line antibody A to form a sandwich structure. When the excitation light is irradiated, the nano material emits a fluorescence signal, The strength of the signal is positively correlated with the CHW antigen concentration in the sample.