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. Author manuscript; available in PMC: 2016 Sep 1.
Published in final edited form as: Anal Bioanal Chem. 2015 Jul 5;407(23):7239–7243. doi: 10.1007/s00216-015-8873-1

Fig. 1.

Fig. 1

I. Modular microfluidic electrochemical immunoarray system. II. Immunoassay strategy for detecting the four protein analytes in serum on (A) the primary antibody (Ab1)-modified electrode surface. (B) On-line capture of protein analytes onto the secondary antibody (Ab2)-MP-HRP in the capture chamber to form protein-bead bioconjugates. (C) Amperometric signal generation by injecting a mixture of hydroquinone and H2O2 into the detection chamber.