Use of the chemiluminescence-producing alkaline phosphatase substrate 3-(4-methoxyspiro[1,2-dioxetane-3,2'-tricyclo-[3.3.1.1(3,7)]decan]-4-yl)phenyl phosphate (AMPPD, also known as adamantyl-1,2-dioxetane phosphate), or its dioxetane relatives provides a substantial increase in sensitivity over colorimetric substrates and radiochemical methods currently used for the detection of antigen-antibody complexes immobilized on nylon or PVDF membranes.
