【Detection principle】 This product uses fluorescence immunochromatography to quantitatively detect FHW in serum/plasma. Basic principle: The nitrocellulose membrane is marked with T and C lines, and the T line is coated with an antibody a that specifically recognizes FHW. The binding pad is sprayed with another fluorescent nanomaterial-labeled antibody b that can specifically recognize FHW, and the FHW in the sample first binds to the nanomateriallabeled antibody b to form a complex, and then upward chromatography, the complex binds to the T-line antibody a to form a sandwich structure, and when the excitation light is irradiated, the nanomaterial emits a fluorescent signal, and the strength of the signal is positively correlated with the concentration of FHW in the sample.