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Plot of the relative changes of Rct values vs. concentration of AFM1 (ΔRct/Rcto = (Rct − Rcto)/Rcto, where Rcto, Rct are charge transfer resistances without and with certain concentration of AFM1, respectively) in a PBS and in a spiked milk samples (see the legend). Results represent mean ± SD from 3 independent experiments in each series. Experiments were performed at presence of 5 mM (1:1) [Fe(CN)6]3−/4− as a redox probe.
