Figure 5.

(a) Fluorescence recovery of the biosensor with the introduction of different amounts of AFM₁ (6, 30, 60, 90, 120, 150, 300, 600, 900, 1200 pg/mL) in 100-diluted milk sample. (b) The linear relationship between the fluorescence recovery (at 520 nm) and the concentration of AFM₁ within the range of 6–150 pg/mL in diluted milk, data were presented as average ±SD from three independent measurements. All experiments were performed in the presence of 80 nM 5′-FAM-labeled AFM₁ aptamer and 0.060 mg/mL PdNPs under excitation at 480 nm.