Table 1.

Results from the fitting of impedance data to the modified Randles circuit—SD = standard deviation, Χ/$\sqrt{\mathrm{N}}$ = error of fitting normalized to the number of data points.

c(Protein A)/nM	Rsol/Ω·cm2	SD	CPE/µF·s(α-1)	SD	α	Rct/Ω·cm2	SD	σ/Ω·s−1/2	SD	Χ/$\sqrt{\mathrm{N}}$
7	44.4	0.2	0.362	0.005	0.95	505.3	0.5	5769	2	0.0122
24	46.2	0.1	0.375	0.004	0.94	593.3	0.5	5847	2	0.0124
70	45.4	0.1	0.359	0.004	0.95	627.9	0.5	5861	2	0.0120
240	46.1	0.1	0.341	0.004	0.95	647.3	0.5	5834	2	0.0105
700	45.3	0.1	0.361	0.004	0.95	657.2	0.5	5811	2	0.0118