Figure 5.

Detection Performance of the Constructed PSA ECL Immunosensor

(A) Linear relationship between the ECL intensity and PSA concentrations.

(B) Selectivity of the ECL immunosensor: blank, AFP (10 ng mL⁻¹), cTnI (10 ng mL⁻¹), IgG (10 ng mL⁻¹), Mb (10 ng mL⁻¹), PSA (1 ng mL⁻¹), and mixture (containing all the above analytes). AFP, alpha-fetoprotein; cTn1, cardiac troponin I; IgG, immunoglobulin G; Mb, myoglobin.

(C) Stabilization of the ECL emission (0.1 nM).

(D) Reproducibility of five independent immunosensors (0.1 nM).

See also Figures S17, Table S1.