The technology principle
For example, syphilis antibody detection reagent was prepared using colloidal gold as indicator mark using the principle of double antigen sandwich method. Add one drop of serum and two drops of buffer solution to the sample hole of the test card. When the T line is reached by chromatography, the complex is immunologically bound to the syphilis recombinant antigen embedded in the T line, thus bridged colloidal gold is colored on the T line. When the remaining gold standard continued to be laminated to line C, the gold standard was colored with the gold of the bridged colloidal gold combined with the polyimmunological resistance buried here. If the serum does not contain syp-ab or less than a certain amount, the malaria recombinant antigen at the T line does not react with the gold standard, and the polyantibody at the C line is still immune to the gold standard, a single color will appear.