Enzyme linked immunosorbent assay (enzyme-linked immunosorbent assay) was invented by Engvail and Perlmann in Sweden in 1971. The basic principle is based on the specific reaction of antigen antibody and enzyme labeling technique. At the time of determination, the specimen (the antibody or antigen) is reacted with the antigen or antibody on the surface of the solid support. The antigen antibody complex formed on the solid phase carrier is separated from other substances in the liquid by a washing method. The enzyme labeled antigen or antibody is also bound to the solid phase carrier by reaction. At the same time, the amount of enzyme on the solid phase was proportional to the amount of the substance in the sample. After adding the substrate of the enzyme reaction, the substrate is catalyzed by the enzyme into a colored product, and the quantity of the product is directly related to the amount of the substance in the sample. Because of the high catalytic efficiency of the enzyme, the result of the immune reaction was amplified indirectly, and the method was highly sensitive.

ELISA can design a variety of different types of detection methods, mainly sandwich method (sandwich), indirect method (indirect), as well as competition (Competitive) three main. Our products are mainly used in direct competition law has the following benefits:

► Have a more simple principle: one-step antigen antibody reaction time can be as short as 20 minutes to complete

► Have a reagent composition is simple, the 3 core reagent: immobilized antibody, substrate, enzyme label plate

► The two components were compared with domestic reagent (A, B solution) for chromogenic agent using mixed substrate technology more convenient and save time