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Multiplex electrochemical detection based on Qdots for distinguishable signals. (A) Different capture antibodies attached to a magnetic bead, followed by (B) binding of the corresponding target antigens on the magnetic beads; (C) Binding of the Qdot-labeled secondary antibodies to form a sandwich type assay (D) acid dissolution of Qdots and subsequent electrochemical stripping detection. Adapted from ref. 65. Copyright 2004 American chemical society.
