【Detection principle】 This product uses fluorescence immunochromatography to quantitatively detect the content of fPL in whole blood and serum/plasma. Basic principle: T and C lines are respectively marked on the nitrocellulose membrane, and the T line is coated with an antibody a that specifically recognizes the fPL antigen. The binding pad is sprayed with another fluorescent nanomaterial-labeled antibody b that can specifically recognize fPL. The fPL in the sample first combines with the nanomaterial-labeled antibody b to form a complex, which is then chromatographed upwards. The complex and the T-line antibody a The combination forms a sandwich structure. When the excitation light is irradiated, the nanomaterial emits a fluorescent signal, and the strength of the signal is positively correlated with the fPL concentration in the sample.