Chemical 4-(diethoxyphosphorothioyloxy) benzoic acid(BPB) represented the general structure of organophosphorus pesticides(Ops) was synthesized and used as hapten coupled with carrier protein KLH for Balb/c mice immunization. Through hybridoma technology,several cell lines were selected and one cell line was proved to possess the ability of secreting monoclonal antibody with broad specicity against multiple Ops. Thereafter,an indirect competitive enzymelinked immunosorbent assay(ic-ELISA) was developed for...