The FOB Rapid Test is a one-step chromatographic sandwich immunoassay. The test consists of: 1) a conjugate pad containing HB monoclonal antibody conjugated with colloidal gold. 2) a nitrocellulose membrane strip containing a test line (T line) and a control line (C line). The T line is pre-coated with another HB antibody, and the C line is pre-coated with a control line antibody (goat-anti-mouse IgG antibody).
After addition of the sample, FOB will bind with a colloidal gold-labeled antibody on the conjugate release pad. The resulting complex flows over the nitrocellulose membrane where a specific capture reagent is pre-coated and a red line can be seen at the test zone (T). Unreacted colloidal gold-labeled antibodies in the sample are captured at the control zone (C). The intensity and speed at which the color develops depend on the FOB concentration in the sample.
