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. 2022 Feb 21;359:131591. doi: 10.1016/j.snb.2022.131591

Fig. 7.

Fig. 7

DPV responses of EDA-GCF, anti-SARS-CoV-2/EDA-GCF, and SARS-CoV-2 SP anti-SARS-CoV-2/EDA-GCF electrodes in [Fe(CN)6]3−/4− solution (inset shows the corresponding CV responses at a scan rate of 100 mV/s). (b) DPV responses of the anti-SARS-CoV-2/EDA-GCF sensor probe with the binding of different concentrations of SARS-CoV-2 SP (0, 2, 6, 20, 60, 200, 600, and 1000 ng/mL in PBS. (c) DPV responses of the anti-SARS-CoV-2/EDA-GCF sensor probe with the binding of different concentrations of SARS-CoV-2 SP (0, 2, 6, 20, 60, 200, 600, and 1000 ng/mL in diluted BP) (inset shows the corresponding calibration plot). (d) Bar diagram of the DPV current responses upon the binding of SARS-CoV-2 SP and different interferences and (e) DPV current responses of five different immunosensors upon the binding of SARS-CoV-2 SP. Insets in Fig. b,c show the calibration plots obtained using the DPV peak current as a function of the logarithm of concentration of SARS-CoV-2 SP; the error bars refer to the standard deviation evaluated from four replicate measurements.