Lead is a Physiological and nerve toxicant with high accumulating property and multiple affinities, and every country has close restraints on the residual quantity of lead in food and environment. The preparation of lead antigen and lead antibody is the basis and key point to build up quick testing kit for lead-enzyme immunity. This research considers adopting antigen and antibody reaction with high-specificity, along with the immune competition binding principle, to bridge and synthesize lead and BSA (Bovi...