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(A) Electroreduction of a diazonium salt on a SPE, for covalent immobilization of β-lactoglobulin antibodies; (B) DPVs of the immunosensor incubated with different concentrations of β-lactoglobulin (inset: calibration curve); (C) Comparison of the DPV response of the graphene-modified electrodes to 1000 ng mL−1 ovalbumin, BSA, casein, lysozyme, and 100 ng mL−1 β-lactoglobulin. Reprinted from [52], Copyright 2012, with permission from Elsevier.
