Photochemical biosensors have been developed for immunoassay: (1)
Luminescent immunosensor, and (2) Electrochemical luminescent (ECL)
immunosensor. A luminescent immunosensor is based on enzyme-linked immunoassay
in which such a luminescence catalyzing enzyme as peroxidase
is used as label. An ECL immunosensor utilizes the inhibition of ECL
by antigen-antibody reaction