【Detection principle】 fSAA content in whole blood, serum/plasma was quantitatively determined by fluorescence immunochromatography. Basic principle: the nitric acid fiber membrane is marked with T and C lines, and the T line is coated with a specific antibody to recognize fSAA antigen. Binding specificity spray mat can identify fSAA another fluorescence labeled antibody b, nanomaterials fSAA and nano material tag first antibody in the sample b to form complexes, and then to the upper analysis, a combination of the complexes and T line antibody, form a sandwich structure, when the excitation light, nanometer material emission fluorescence signal, and the signal strength and fSAA concentration in the samples into positive correlation.