Sensitivity and Selectivity on Aptamer-Based Assay: The Determination of Tetracycline Residue in Bovine Milk

Figure 7

Optimization of the concentration of RNA aptamer: (•) 0.1 μg mL⁻¹, (∘) 0.07 μg mL⁻¹, (▾) 0.05 μg mL⁻¹, and (▵) 0.02 μg mL⁻¹ with the concentration of TC-HRP conjugate, 1 μg mL⁻¹.