Principle of Assay
Aflatoxin M1 ELISA Test Kit (A327178) employs the competitive enzyme immunoassay technique for the quantitative measurement of Aflatoxin M1 in milk or dairy. The 96-well microtiter plate has been pre-coated with Aflatoxin M1. During the incubation, Aflatoxin M1 present in the samples or standards competes with the fixed amount of immobilized Aflatoxin M1 for binding sites of the Anti-Aflatoxin M1 Antibody, a HRP-Conjugated Secondary Antibody is added to the wells at the same time. The more Aflatoxin M1 present in a sample or standard, the less Anti-Aflatoxin M1 Antibody that binds to the plate. Following incubation, unbound HRP-Conjugated Secondary Antibody is removed by washing. Following incubation and washing, TMB substrate solution is then used to visualize the HRP enzymatic reaction by catalysis to produce a blue-coloured product that changes to yellow after addition of acidic stop solution. The density of yellow is inversely proportional to the amount of Aflatoxin M1 present in each sample or standard. The concentration of Aflatoxin M1 can then be calculated by reading the O.D. absorbance at 450nm in a microplate reader and referring to the standard curve.
