Fig. 4. (A) ECL curve of this proposed aptasensor at different concentrations of AFM1: 0.03 pg mL⁻¹, 0.3 pg mL⁻¹, 3 pg mL⁻¹, 0.03 ng mL⁻¹, 0.3 ng mL⁻¹, 3 ng mL⁻¹, 30 ng mL⁻¹, and 0.3 μg mL⁻¹ (from a to h). (B) The corresponding calibration plot of the AFM1 aptasensor. (C) Stability of the proposed aptasensor towards different concentrations of AFM1. (D) Selectivity of the aptasensor towards AFM1 (3 ng mL⁻¹) against interferents: AFB1, AFB2, kanamycin, glucose, melamine, and a mixture (containing the above interferents and 3 ng mL⁻¹ AFM1). The concentration of each interferent was 3 μg mL⁻¹.