Research Article
Functionalised Au Coated Iron Oxide Nanocomposites Based Reusable Immunosensor for AFB1 Detection
Figure 7
(a) CV of the AFB1/BSA/aAFB1/4-ATP/Au immunoelectrode with respect to the r-IgG-Cys-Au-Fe3O4 concentration: (a) 10 μg mL−1, (b) 20 μg mL−1, (c) 30 μg mL−1, (d) 40 μg mL−1, and (e) 50 μg mL−1, in PBS (50 mM, pH 7.4, 0.9% NaCl) containing [Fe(CN)6]3−/4− (5 mM). (b) Calibration curve for competitive detection of AFB1. Inset (b) shows (i) CV of the AFB1/BSA/aAFB1/4-ATP/Au immunoelectrode with respect to the AFB1 concentration (0.05−5 ng mL−1). (c) Calibration curve for noncompetitive detection of AFB1. Inset (c) shows (i) CV of the AFB1/BSA/aAFB1/4-ATP/Au immunoelectrode with respect to the AFB1 concentration (0.5−5 ng mL−1).
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