Figure 2.

(A) Reactions involved in the ACTH immunosensor using SPEs modified with phenylboronic acid; (B) DPV obtained with the Strept-AlkP–Biotin-ACTH/anti-ACTH/SPCE electrode for 0 (1), 0.05 (2), 0.50 (3), and 1.00 (4) pg mL⁻¹ ACTH. Reprinted from [16], Copyright 2012, with permission from Elsevier; (C) Above, scheme of the immunosensor principle for SA and TC antibiotics. Below, surface chemistry involved for covalent binding of Protein G; (D) Calibration curves obtained with the SPY/TC immunosensor for SPY and TC in a 1:1 PBS:milk mixture. Reprinted from [17], Copyright 2013, with permission from Elsevier.